CBAT
As stated elsewhere at this CBAT website, novae in M31 are relatively common (unlike their counterparts in the Magellanic Clouds or the Milky Way, which have only a few observed novae each year). There are roughly a couple dozen novae to be discovered (brighter than about mag 20) in M31 each year [cf., e.g., Capaccioli et al. 1989, A.J. 97, 1622; Hatano et al. 1997, Ap.J. 487, L45; Aguirre 2000, Sky Tel. 99(6), 80]. For this reason, we generally do not announce M31 novae on IAUCs unless they are brighter than about mag 15 or there is spectroscopic confirmation. Historical precedent has been therefore to publish announcements of all novae discoveries in the Milky Way and in the Magellanic Clouds on IAUCs, but not all discoveries of novae in M31. Occasionally, as space permits, the IAUCs will publish some information on newly discovered novae in M31, particularly if they include detailed information that include precise astrometry and spectroscopic data; brighter novae in M31 (i.e., those of mag 15 or brighter; cf. Sharov 1989, Sov. Astron. Lett. 15, 5) will naturally receive stronger attention.
But traditionally, for many decades, M31 novae discoveries have been announced in the main astronomical literature in groups, representing novae discovered over spans of a year or often many years (e.g., Sharov and Alksnis 1997, Astronomy Letters 23, 540), and the IBVS are another proper location for publishing novae discoveries in other galaxies more promptly. This webpage was begun in 2004 to address the reports of apparent M31 novae sent to the CBAT (only reports sent in 2004 and thereafter are listed here); most of these will not appear on IAU Circulars, but some may appear on CBETs. To warrant inclusion here, we go by the same rules that govern assignment of supernova and nova designations -- namely, that multiple nights of observations must be reported (excepting where multiple observatories report confirming observations on a single night, or spectroscopy is immediately available). This page is patterned after the CBAT's Unconfirmed Supernovae webpage. Note that David Bishop's website contains images for many of these objects.
The observations of apparent novae in M31 are listed below in plain ASCII text (with NO tabs!) in a 98-column format. The designation scheme is M31N YYYY-MMa, where YYYY is the year and MM is the 2-digit month of discovery, and 'a' is a lower-case letter (a, b, c, etc.) representing the order of discovery within that month; note that multiple lines for the same object are tabulated when there is more than one independent discovery of a particular nova (i.e., one line per discovery report). Note the following template to guide you in producing a similar list to send for inclusion.
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M31N DATE (UT) R.A. (2000.0) Decl. Mag. OFFSET REPORTER
YYYY-MMa YYYY MM DD.DDD hh mm ss.ss +oo '' ""." MM.MLx rrrD rrrD Person sending text
Above, the date (given as year, month, date in Universal Time) should be given to 0.01 or 0.001 day, with leading zeroes if appropriate, in columns 12-25. The right ascension (columns 28-38) and declination (columns 40-50) should be given to full precision (0s.01 in R.A. and 0".1 in Decl.), with leading zeroes if appropriate. The magnitude should be given to tenths in columns 53-56, with column 57 for the bandpass (and column 58 for any additional bandpass character); use usual upper- and lower-letter band letters, "H" for H-alpha narrowband magnitudes, and use "U" for unfiltered CCD. The offset (columns 60-64 for right ascension and columns 66-70 for declination) of the new object from the center of M31 should be given in arc seconds for both R.A. and Decl., with the values given to 0".1 and the directional letters (E = east = 90 degrees clockwise from north toward south, and W = west for R.A. offsets; N = north and S = south for Decl. offsets) specified. The person(s) who actually send the e-mail with the discovery should be placed (first initial, full last name) in columns 75-93. Columns 95-98 contains the number for the note that will contain additional information (including the name of the survey, any other contributing astronomers, and important succinct details regarding reference images and their dates and limiting magnitudes, etc.); the appropriate sequential designation number and letter will be added by the webmaster.
For reference, the nucleus or core of M31 is located at R.A. = 0h42m44s.32, Decl. = +41o16'08".53 (equinox 2000.0), according to a measurement by Weidong Li.
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M31N DATE (UT) R.A. (2000.0) Decl. Mag. OFFSET REPORTER
2000-08a 2000 08 06.233 00 42 47.47 +41 15 07.5 17.0H 36E 61S K. Hornoch
2000-08b 2000 08 06.233 00 42 46.76 +41 12 51.8 17.9H 28E 197S K. Hornoch
2003-07a 2003 07 14.989 00 42 02.93 +41 05 01.5 18.7R 468W 667S K. Hornoch
2004-01a 2004 01 22.699 00 43 08.63 +41 15 36.4 18.5R 274E 32S K. Hornoch
2004-03a 2004 03 03.767 00 42 36.21 +41 15 37.9 17.4R 92W 31S K. Hornoch
2004-03b 2004 03 14.772 00 43 06.72 +41 11 58.5 18.1R 253E 250S K. Hornoch
2004-05a 2004 05 18.061 00 42 37.55 +41 10 16.4 17.8R 76W 352S K. Hornoch
2004-05b 2004 05 18.061 00 42 37.04 +41 14 28.5 17.2R 82W 100S K. Hornoch
2004-05c 2004 05 18.061 00 43 04.04 +41 23 42.6 18.8R 222E 454N K. Hornoch
2004-06a 2004 06 08.040 00 42 22.31 +41 13 44.9 17.2R 248W 144S K. Hornoch
2004-06b 2004 06 22.003 00 42 41.30 +41 14 04.2 17.9R 34W 124S K. Hornoch
2004-06c 2004 06 22.021 00 42 49.02 +41 19 17.8 18.0R 53E 189N K. Hornoch
2004-07a 2004 07 30.00 00 42 43.99 +41 17 31.6 16.0H 4W 83N M. Fiaschi
2004-08a 2004 08 02.974 00 42 20.62 +41 16 09.5 17.4R 267W 1N K. Hornoch
2004-08b 2004 08 06.997 00 43 26.84 +41 16 40.8 17.8R 479E 32N K. Hornoch
2004-09a 2004 09 03.018 00 42 40.25 +41 14 42.9 17.5R 46W 86S K. Hornoch
2004-10a 2004 10 09.335 00 42 51.84 +41 16 18.2 18.6R 85E 10N K. Hornoch
2004-10b 2004 10 09.335 00 42 47.24 +41 15 54.6 19.6R 33E 14S K. Hornoch
2004-11a 2004 11 04 00 42 42.8 +41 18 31 18.0U 13W 143N M. Armstrong
2004-11a 2004 11 05.847 00 42 42.76 +41 18 28.0 16.6R 18W 140N K. Hornoch
2004-11a 2004 11 07.492 00 42 42.82 +41 18 26.8 16.5U H. Yamaoka
2004-11a 2004 11 08.9 00 42 42.88 +41 18 28.6 16.5U 17W 145N F. Manzini
2004-11a 2004 11 05.847 00 43 07.43 +41 18 04.4 16.7R 260E 116N K. Hornoch
2004-11b 2004 11 07.492 00 43 07.40 +41 18 04.3 17.7U H. Yamaoka
2004-11c 2004 11 15.8 00 42 32.27 +41 19 25.2 16.2U 142W 206N F. Manzini
2004-11c 2004 11 16.82 00 42 32.27 +41 19 25.2 17.0U 142W 206N A. Dimai
2004-11d 2004 11 24.718 00 42 45.63 +41 16 32.8 17.0R 15E 24N K. Hornoch
2004-11e 2004 11 25.889 00 43 31.84 +41 09 43.2 17.6H 536E 385S M. Fiaschi
2004-11e 2004 11 29.796 00 43 31.85 +41 09 42.6 17.6R 536E 386S K. Hornoch
2004-11f 2004 11 25.889 00 42 47.20 +41 16 19.7 17.6H 32E 11N M. Fiaschi
2004-12a 2004 12 30.730 00 42 28.05 +41 09 55.6 16.8R 184W 373S K. Hornoch
2005-01a 2005 01 07.891 00 42 28.38 +41 16 36.2 17.9R 180W 28N K. Hornoch
2005-01a 2005 01 10.925 00 42 28.34 +41 16 37.6 15 U R. Arbour
2005-02a 2005 02 18.77 00 42 52.76 +41 14 29.0 17.7U 128E 99S M. Migliardi
2005-05a 2005 05 16.066 00 42 54.84 +41 16 51.5 17.2R 119E 43N K. Hornoch
2005-05b 2005 05 19.452 00 42 47.15 +41 15 35.7 20.0R 32E 33S K. Hornoch
2005-06a 2005 06 14.181 00 42 28.40 +41 16 50.8 17.7R 180W 42N K. Hornoch
2005-06a 2005 06 17.722 00 42 28.35 +41 16 51.0 17.5U K. Itagaki
2005-06b 2005 06 14.181 00 41 37.22 +41 13 11.7 18.1R 757W 177S K. Hornoch
2005-06c 2005 06 27.008 00 42 31.35 +41 16 20.9 16.3H 146W 12N M. Fiaschi
2005-06c 2005 06 23.210 00 42 31.39 +41 16 20.7 16.6R 146W 12N K. Hornoch
2005-07a 2005 07 27.909 00 42 50.71 +41 20 40.2 18.4R 72E 272N K. Hornoch
2005-09a 2005 09 13.0 00 42 52.30 +41 19 58.3 18.0R 90E 229N E. Ovcharov
2005-09a 2005 09 13.9 00 42 52.27 +41 19 59.0 16.1U 93E 240N F. Manzini
2005-09b 2005 09 01.23 00 38 49.52 +40 19 54.1 18.0U 2647E 3374S R. Quimby
2005-09c 2005 09 22.17 00 38 54.63 +40 27 34.2 16.3U 2590E 2914S R. Quimby
2005-10a 2005 10 11.15 00 44 20.7 +41 23 11 16.7U 1087E 422N R. Quimby
2005-10a 2005 10 12.979 00 44 20.80 +41 23 10.9 15.2H 1087E 422N M. Fiaschi
2005-10b 2005 10 26.824 00 42 42.18 +41 18 00.1 18.2R 24W 112N K. Hornoch
2006-01a 2006 01 05.08 00 41 50.42 +40 42 22.5 17.2U 608W 2026S R. Quimby
2006-02a 2006 02 02.748 00 42 50.68 +41 15 49.1 18.0R 72E 19S K. Hornoch
2006-04a 2006 04 28.7725 00 43 13.38 +41 16 58.8 16.7U S. Nakano
2006-04a 2006 04 26.273 00 43 13.38 +41 16 58.9 15.9U W. Pietsch
2006-06a 2006 06 01.7387 00 43 11.76 +41 13 45.0 18.0U S. Nakano
2006-06b 2006 06 06.018 00 42 32.76 +41 16 49.2 18.6R 130W 41N K. Hornoch
2006-08a 2006 08 15.5707 00 44 32.45 +41 35 42.7 17.9U S. Nakano
2006-09a 2006 09 03.5202 00 42 33.18 +41 10 06.9 16.4U S. Nakano
2006-09b 2006 09 14.876 00 42 41.60 +41 14 45.7 17.0R 31W 83S K. Hornoch
2006-09b 2006 09 17.0374 00 42 41.45 +41 14 44.6 17.1R 33W 85S V. Burwitz
2006-09c 2006 09 18.5831 00 42 42.38 +41 08 45.5 16.6U S. Nakano
2006-09c 2006 09 18.14 00 42 42.3 +41 08 46.1 16.7U 23W 442S R. Quimby
2006-10a 2006 10 25.812 00 41 43.23 +41 11 45.9 18.7R 689W 263S K. Hornoch
2006-10b 2006 10 31.583 00 39 27.47 +40 51 09.8 16.6U S. Nakano
2006-10b 2006 10 31.09 00 39 27.38 +40 51 09.8 16.4U 2220W 1499S Anonymous
2006-11a 2006 11 25.4677 00 42 56.81 +41 06 18.4 17.5U S. Nakano
2006-11b 2006 11 19.115 00 42 44.05 +41 15 02.2 18.9R 3W 66S A. Riffeser
2006-11c 2006 11 30.808 00 41 33.23 +41 10 12.3 17.3R 802W 356S K. Hornoch
2006-12a 2006 12 20.857 00 42 21.09 +41 13 45.3 17.8R 257W 138S A. Riffeser
2006-12a 2006 12 23.674 00 42 21.06 +41 13 45.6 17.5R 262W 143S K. Hornoch
2006-12b 2006 12 26.825 00 42 11.14 +41 07 43.8 18.0R 375W 505S K. Hornoch
2006-12c 2006 12 26.825 00 42 43.25 +41 17 47.9 17.6R 12W 99N K. Hornoch
2006-12d 2006 12 26.825 00 42 44.08 +41 15 02.1 17.5R 3W 66S K. Hornoch
2007-01a 2007 01 20.881 00 42 51.14 +41 14 33.2 17.5R 77E 95S K. Hornoch
2007-01a 2007 01 21.747 00 42 51.13 +41 14 33.1 17.3R 77E 95S E. Ovcharov
2007-02a 2007 02 07.09 00 40 59.02 +40 44 52.7 17.2U 1187W 1876S R. Quimby
2007-02b 2007 02 03.798 00 41 40.32 +41 14 33.5 16.7R 722W 95S K. Hornoch
2007-02c 2007 02 09.862 00 42 39.96 +41 17 21.9 17.2R 49W 73N K. Hornoch
2007-02d 2007 02 24.484 00 44 14.35 +41 36 59.8 16.7U S. Nakano
2007-03a 2007 03 04.763 00 42 53.60 +41 12 09.8 15.8R 105E 239S K. Hornoch
2007-05a 2007 05 18.060 00 43 02.61 +41 14 41.5 18.5R 206E 87S K. Hornoch
2007-06a 2007 06 14.022 00 41 58.33 +41 14 10.6 19.1R 519W 118S E. Ovcharov
2007-06a 2007 06 15.053 00 41 58.40 +41 14 10.9 19.4R 518W 118S K. Hornoch
2007-06b 2007 06 19.4 00 42 33.14 +41 00 25.9 16.8U 126W 943S (R. Quimby)
2007-07a 2007 07 05.050 00 43 04.05 +41 17 08.3 16.6R 222E 60N V. Burwitz
2007-07a 2007 07 06.989 00 43 04.07 +41 17 07.9 17.8R 223E 59N K. Hornoch
2007-07b 2007 07 11.019 00 42 45.84 +41 18 02.7 18.6R 17E 114N E. Ovcharov
2007-07b 2007 07 10.042 00 42 45.89 +41 18 04.2 17.5H 18E 116N W. Pietsch
2007-07c 2007 07 19.007 00 43 03.29 +41 14 52.9 18.8R 214E 76S V. Burwitz
2007-07c 2007 07 23.569 00 43 03.26 +41 14 53.0 16.7U S. Nakano
2007-07c 2007 07 23.682 00 43 03.23 +41 14 53.4 16.8U S. Nakano
2007-07d 2007 07 24.046 00 42 59.49 +41 15 06.5 19.4R 171E 62S V. Burwitz
2007-07e 2007 07 26.940 00 42 43.26 +41 17 43.1 16.8U 11W 96N V. Burwitz
2007-07e 2007 07 26.960 00 42 43.29 +41 17 44.1 18.0R 11W 96N V. Burwitz
2007-07e 2007 07 28.097 00 42 43.23 +41 17 44.1 16.4U 11W 96N V. Burwitz
2007-07e 2007 07 29.101 00 42 43.24 +41 17 42.9 16.9U 11W 96N V. Burwitz
2007-08a 2007 08 06.3 00 40 54.40 +40 53 50.3 16.1U 1239W 1338S R. Quimby
2007-08b 2007 08 14.969 00 41 49.41 +41 04 02.6 19.4R 620W 726S K. Hornoch
2007-08c 2007 08 30.018 00 42 29.37 +41 18 25.0 17.8R 168W 136N W. Pietsch
2007-08c 2007 08 30.987 00 42 29.37 +41 18 25.0 17.6R 169W 136N K. Hornoch
2007-08d 2007 08 24.081 00 39 30.27 +40 29 14.2 18.7R 2190W 2814S W. Pietsch
2007-10a 2007 10 05.6064 00 42 55.93 +41 03 22.0 16.0U S. Nakano (Itagaki)
2007-10a 2007 10 05.7310 00 42 55.93 +41 03 22.4 16.6U S. Nakano (Nishiyama)
2007-10a 2007 10 05.7477 00 42 55.93 +41 03 21.9 16.4U S. Nakano (Kadota)
2007-10a 2007 10 05.868 00 42 55.91 +41 03 21.3 16.5R E. Ovcharov
2007-10a 2007 10 06.104 00 42 55.95 +41 03 22.0 17.1U 131E 766S W. Pietsch
2007-10b 2007 10 13.255 00 43 29.47 +41 17 14.1 18.0R 509E 65N V. Burwitz
2007-10b 2007 10 13.259 00 43 29.45 +41 17 13.8 17.8R 509E 65N V. Burwitz
2007-10b 2007 10 13.720 00 43 29.53 +41 17 13.8 18.5R 510E 65N K. Hornoch
2007-11a 2007 11 02.280 00 42 37.29 +41 17 10.3 16.9R 79W 62N W. Pietsch
2007-11b 2007 11 01.35 00 43 52.99 +41 03 36.2 19.3R 774E 752S V. Burwitz
2007-11b 2007 11 06.809 00 43 52.94 +41 03 36.0 19.7R 774E 753S E. Ovcharov
2007-11c 2007 11 13.047 00 43 04.11 +41 15 53.6 17.8R 223E 15S K. Hornoch
2007-11c 2007 11 13.27 00 43 04.14 +41 15 54.3 17.4R 223E 14S V. Burwitz
2007-11c 2007 11 13.442 00 43 04.13 +41 15 54.1 17.1U S. Nakano
2007-11c 2007 11 13.55 00 43 04.14 +41 15 54.2 16.6U S. Nakano
2007-11d 2007 11 17.569 00 44 54.59 +41 37 40.1 17.1U S. Nakano
2007-11d 2007 11 16.511 00 44 54.60 +41 37 40.0 17.7U S. Nakano
2007-11d 2007 11 19.522 00 44 54.62 +41 37 39.9 15.1U S. Nakano (Itagaki)
2007-11e 2007 11 28.390 00 45 47.75 +42 02 03.7 16.5U S. Nakano (Itagaki)
2007-11f 2007 11 28.716 00 41 31.52 +41 07 13.1 17.8R 821W 535S E. Ovcharov
2007-11f 2007 12 04.19 00 41 31.61 +41 07 14.1 18.4R 821W 534S W. Pietsch
2007-11g 2007 11 28.716 00 44 15.88 +41 13 51.1 18.7R 1032E 137S E. Ovcharov
2007-11g 2007 10 29.27 00 44 15.80 +41 13 50.3 18.8R 1032E 138S W. Pietsch
2007-12a 2007 12 05.523 00 44 03.51 +41 38 41.1 18.3U S. Nakano
2007-12a 2007 12 05.666 00 44 03.55 +41 38 41.2 17.8U S. Nakano (Kadota)
2007-12b 2007 12 09.528 00 43 19.95 +41 13 46.6 16.1U S. Nakano
2007-12b 2007 12 10.734 00 43 19.98 +41 13 46.4 17.0R 402E 142S K. Hornoch
2007-12c 2007 12 14.382 00 45 09.54 +41 20 07.1 16.8U S. Nakano (Itagaki)
2007-12c 2007 12 13.76 00 45 09.58 +41 20 07.6 16.4U 1637E 239N W. Pietsch
2007-12c 2007 12 15.415 00 45 09.55 +41 20 07.9 16.9U S. Nakano (Kadota)
2007-12d 2007 12 17.574 00 41 54.94 +41 09 47.5 16.8U S. Nakano
2007-12d 2007 12 18.19 00 41 54.96 +41 09 47.3 17.2R 557W 382S M. Henze
2007-12d 2007 12 18.664 00 41 54.94 +41 09 47.4 17.8U S. Nakano (Kadota)
2008-01a 2008 01 20.21 00 42 58.54 +41 14 44.1 17.2R 161E 85S V. Burwitz
2008-01a 2008 01 20.21 00 42 58.55 +41 14 44.5 17.5g 160E 84S A. Rau
2008-01b 2008 01 19.11 00 44 53.56 +41 53 04.7 17.6U 1457E 2216N F. Yuan
2008-02a 2008 02 07.17 00 42 30.40 +41 09 53.9 18.2R 157W 376S M. Henze
2008-02a 2008 02 08.17 00 42 30.38 +41 09 53.8 17.0R 157W 376S M. Henze
2008-02a 2008 02 08.448 00 42 30.40 +41 09 54.5 17.4U S. Nakano
2008-02a 2008 02 08.726 00 42 30.39 +41 09 53.7 17.0R 157W 375S K. Hornoch
2008-02b 2008 02 13.4361 00 43 08.87 +41 35 55.6 17.6U S. Nakano
2008-02b 2008 02 16.4291 00 43 08.86 +41 35 55.8 17.6U S. Nakano
2008-02b 2008 02 17.4374 00 43 08.89 +41 35 55.7 17.4U S. Nakano
2008-03a 2008 03 01.4351 00 42 10.06 +40 57 48.7 18.0U V. Burwitz (Nishiyama/Kabashima)
2008-03a 2008 03 02.8317 00 42 10.08 +40 57 48.7 15.2U 393W 1100S V. Burwitz
2008-03b 2008 03 07.756 00 42 34.24 +41 16 44.9 17.7R 114W 36N K. Hornoch
2008-03b 2008 03 08.13 00 42 34.21 +41 16 44.4 17.1R 114W 35N M. Henze
NOTES:
(2000-08a) Discovered by Hornoch (see M31N 2004-03a) and D. Carter on archival images
taken by D. Carter using 2.5-m Isaac Newton telescope at La Palma in 2000; images were
downloaded from public ING archive. H_alpha magnitudes by Hornoch (except otherwise
noted): 2000 July 27.217 UT, 18.7: (prediscovery 2.5-m INT image obtained by Watson);
Aug. 6.233, 17.09; 6.241, 16.96; 2004 Dec. 18.068, [22 (3.5-m WIYN telescope R-band
image obtained by P. Garnavich). Hornoch could not find a record of this object
in any searches of papers or WWW pages devoted to novae in M31.
(2000-08b) Discovered by Hornoch (see M31N 2004-03a) and D. Carter on archival images
taken by D. Carter using 2.5-m Isaac Newton telescope at La Palma in 2000. Images
were downloaded from public ING archive. H_alpha magnitudes by Hornoch (except
otherwise noted): 2000 July 27.217 UT, 17.5 (prediscovery 2.5-m INT image obtained
by Watson); Aug. 6.233, 17.91; 6.241, 17.90; 2004 Dec. 18.068, [22 (3.5-m WIYN
telescope R-band image obtained by P. Garnavich). Hornoch could not find a record
of this object in any searches of papers or WWW pages devoted to novae in M31.
(2003-07a) Discovery by Hornoch (see M31N 2004-03a) in mid-2004 on archival images taken by
L. Sarounova and P. Kusnirak at Ondrejov (O) and by Hornoch at Lelekovice (L); R-band
magnitudes: 2002 Sept. 13.136 UT, [20.6 (O); 2003 July 9.025, [18.7 (L); 11.038,
18.3: (L); 14.989, 18.7: (L); 19.034, 19.0 (O); 20.014, 18.4 (L); 25.974, 17.9 (L);
26.020, 18.2 (O); 26.980, 17.6 (L); 27.049, 18.0 (O); Aug. 4.909, 18.7 (O);
5.981, 18.7 (L); 7.989, 18.8 (L); 15.959, 18.7: (L); 22.980, 19.2: (L);
23.971, 18.7 (L); 26.930, 18.9: (L); Sep. 6.043, 18.7 (O); 14.828, [18.5 (L);
21.822, 18.6: (L); 30.825, [19.1 (L); 2004 July 16.988, [20.0 (L).
(2004-01a) Discovery by Hornoch (see M31N 2004-03a). R-band magnitudes by Hornoch unless
noted otherwise: Jan. 23.717, 18.5; 23.718, 18.4; Feb. 11.748, 17.8; 12.770, 18.1;
Mar. 3.767, 18.9; 5.750, 19.2; 14.772, 19.4; 17.766, 19.9 (P. Kusnirak, Ondrejov
Observatory); 17.769, 19.6.
(2004-03a) Kamil Hornoch, Lelekovice, Czech Republic, 0.35-m reflector + ST-6V CCD.
Discovery from co-added 540-sec R-band frames. Hint of the new object is present on
images from Feb. 24.801 and 25.738 UT. Apparent nova is not present on many older
images from years 2002-2004 (the last one was taken on Feb. 20.740, limiting mag 18.8).
Coadded broadband 29 H-alpha 30-sec images taken on Mar. 5.779 also show well the
new object. R-band magnitudes by Hornoch unless noted otherwise: Feb. 11.748, [19.0;
20.740, [18.8; 24.801, 18.8: (hint of object); 25.738, 19.0 (hint); Mar. 3.767, 17.4;
3.801, 17.3; 5.750, 17.8; 14.772, 19.3; 17.766, 19.5 (P. Kusnirak, Ondrejov Observatory).
(2004-03b) Discovered by Hornoch (see M31N 2004-03a) on co-added 900-sec R-band frames.
R-band magnitudes by Hornoch unless noted otherwise: Mar. 3.767, [19.8; 5.750, 19.5:
(hint of new object); 17.766, 19.2 (P. Kusnirak, Ondrejov Observatory); 17.769, 19.5:.
Nothing visible at this position on numerous Ondrejov images from 2003 (limiting mag
R = 21) or on Hornoch's images back to 2002.
(2004-05a) Discovered by Hornoch (see M31N 2004-03a) and P. Kusnirak on ten 120-sec R-band
images taken with the Ondrejov Observatory 0.65-m reflector (+ AP7p CCD camera).
Not present on previous images from years 2003 and 2004 taken at Ondrejov and at
Lelekovice (the last previous one taken at Ondrejov on Mar. 17.766 UT with limiting
mag R = 20.5). Positions and magnitudes was measured from coadded 1200-sec R-band
image. Confirmed on Ondrejov CCD frames taken on May 19.060.
R-band magnitudes: Mar. 17.766, [20.5; May 19.060, 17.0; 20.063, 17.2; June 14.025, 19.0;
15.041, 18.9 (Kusnirak).
(2004-05b) Details as for M31N 2004-05a. R-band magnitudes: Mar. 17.766 UT, [20.5; May
19.060, 17.2; 20.063, 18.1; June 14.025, 18.8:; 15.041, 19.0: (Kusnirak).
(2004-05c) Details as for M31N 2004-05a. R-band magnitudes: Mar. 17.766 UT, [20.5; May
19.060, 19.0:; 20.063, 18.4; June 14.041, [19.2; 15.041, 19.3: (Kusnirak).
(2004-06a) Discovered by Hornoch (see M31N 2004-03a). R-band magnitudes from Hornoch
images unless otherwise noted: May 31.061, [18.9; June 9.039, 17.3 (P. Kusnirak,
Ondrejov); 14.025, 18.0; 15.041, 17.8 (Kusnirak); 22.003, 18.8; 25.017, 18.9.
(2004-06b) Discovered by Hornoch (see M31N 2004-03a). R-band magnitudes by Hornoch
unless otherwise noted: June 8.040 UT, [19.4; 14.025, 18.6 (prediscovery); 15.041, 18.1
(prediscovery, P. Kusnirak); 22.003, 17.9; 27.001, 18.0; 30.005, 18.0; July 7.006, 18.1.
H. Yamaoka reports a marginal detection by K. Itagaki on an unfiltered
CCD image taken on June 17 at mag about 18.0 (but not detected on images from
2003 June 17 and Oct. 27).
(2004-06c) Discovered by Hornoch (see M31N 2004-03a). R-band magnitudes: June
15.041 UT, [20.0; 22.021, 18.0; 27.026, 17.4; 30.005, 18.4; July 7.006, 19.3.
(2004-07a) Discovered by Marco Fiaschi, Dario Tiveron, and Francesco Di Mille at
Astronomical Observatory "G. Colombo", Padova, Italy, on CCD images taken with
an H_alpha filter (FWHM = 6.3 nm) and a 0.41-m f/4.84 Newtonian reflector.
An image of the same field taken with an H_alpha filter on Feb. 9 showed nothing
at this position (limiting mag 18). Reference stars for H_alpha photometry are
from Ciardullo et al. (1987, Ap.J. 318, 520). Fiaschi et al. used the "modus
operandi" as for their previous discoveries of M31 novae (cf. IAUC 7709).
(2004-08a) Discovery by Hornoch (see M31N 2004-03a) and L. Sarounova on co-added 840-sec
R-band CCD frames taken with Ondrejov 0.65-m reflector (+ Apogee AP7p CCD camera).
Nothing visible at this location back to 2002 in images to limiting mag R = 20.5.
R-band magnitudes: July 30.970, [19.0; Aug. 3.923, 17.7; 4.919, 18.3.
(2004-08b) Discovery by Hornoch (see M31N 2004-03a) and P. Kusnirak on co-added 1260-sec
R-band frames taken with the 0.65-m reflector (+ Apogee AP7p CCD camera) at Ondrejov.
R-band magnitudes (O = Ondrejov images; L = Lelekovice images): Aug. 2.974 UT, [20.5
(O); 3.960, 19.4: (L); 4.901, 19.0 (L); 6.997, 17.8 (O); 7.905, 17.6 (L); 7.982, 17.3 (O);
9.070, 17.8 (O); 10.005, 18.5 (L); 10.893, 18.2 (L); 10.956, 17.9 (L); 12.057, 18.3
(O); 15.943, 17.8 (L); 17.870, 17.8 (L); 18.910, 17.9 (L); 19.086, 17.7 (O); 19.875,
17.9 (L); 22.929, 17.8 (L); 23.902, 17.7 (L); 24.060, 17.6 (O); 28.842, 18.3 (L);
28.899, 18.1 (L); 31.915, 18.6 (L); 31.964, 18.5 (L); Sept. 3.018, 18.6 (O); 3.812, 18.7
(L); 3.868, 18.7 (L); 4.819, 19.0 (L); 5.058, 18.9 (O); 5.862, 19.0 (L); 6.930, 19.0 (L);
8.929, 18.3 (L); 8.953, 18.4 (L); 9.071, 18.5 (O); 9.863, 18.4 (L); 9.893, 18.3 (L);
10.884, 18.5; 13.953, 18.6; 16.832, 19.3; 17.835. 19.3; 21.830, 19.5:; 26.790, 19.5.
V-band magnitude: Aug. 24.063, 17.6 (O). Published with spectroscopic confirmation
on IAUC 8404.
(2004-09a) Discovery by Hornoch (see M31N 2004-03a) and M. Wolf on co-added 720-sec R-band
frames taken with the 0.65-m reflector + CCD (Apogee AP7p camera) at Ondrejov (O).
Apparent nova was confirmed on my prediscovery images from Lelekovice (L), but is not
present on many older images from years 2002-2004 down to R = 20. R-band magnitudes:
Aug. 24.060 UT, [19.8 (O); 28.899, [19.1 (L); 31.915, 18.3 (L); 31.938, 18.0 (L);
31.952, 17.8 (L); Sept. 3.018, 17.5 (O); 3.812, 17.7 (L); 3.868, 17.6 (L); 4.841, 18.2
(L); 5.058, 18.1 (O); 5.862, 18.1 (L); 5.900, 18.2 (L); 6.930, 18.0 (L); 8.929, 18.2
(L); 8.953, 18.1 (L); 9.071, 18.2 (O); 9.863, 18.3 (L); 9.893, 18.4 (L); 10.884, 18.5;
13.953, 18.7; 16.832, 18.7; 17.835. 19.2:; 21.830, 18.9:; 26.790, 19.5:. Published
with spectroscopic confirmation on IAUC 8404.
(2004-10a) Discovery by Hornoch (see M31N 2004-03a), Peter Garnavich, X. Zhang, and T.
Pimenova on co-added 420-sec R-band and 360-sec S-Vilnius-band CCD frames taken with
the 1.83-m Vatican Advanced Technology Telescope at Mt. Graham. Nothing visible to
mag R = 21.5 on images from 2003. Strong H_alpha emission. R-band magnitudes:
Oct. 10.302, 18.6.
(2004-10b) Same details as for M31N 2004-10a. R-band magnitudes: Oct. 10.302, 19.1.
(2004-11a) Mark Armstrong, Rolvenden, Kent, England. Nothing visible at this
position on images from 2003 Aug. 8 or 2004 Oct. 5 (limiting mag 19.5).
Astrometry for Armstrong's report by Martin Mobberley.
K. Hornoch's (see M31N 2004-03a) independent discovery from R-band CCD frames.
Additional R-band magnitudes: Oct. 10.3, [22 (VATT image; cf. 2004-10a); 22.908, [21
(Ondrejov image); Nov. 5.890, 16.5; 7.852, 17.0; 11.904, 18.1; 14.805, 18.2;
15.718, 18.4; 24.718, 19.0; 25.773, 19.2; 29.796, 19.4:; 29.817, 19.6:.
Yamaoka reports observations from K. Itagaki (Teppo-cho, Yamagata, Japan, apparently
unfiltered CCD images), that he evidently made in response to posting at CBAT website.
Also, discovered by Federico Manzini, Stazione Astronomica di Sozzago,
Novara, Italy (MPC code A12): during SAS Supernova Search with the SAS 0.4-m telescope.
An SAS image of M31 taken on Sept. 27.9 shows nothing at the position of the apparent
nova (limiting mag about 19.0). Astrometry for Manzini's report by Raoul Behrend
(Geneva Observatory). Confirmed on CCD images by Alessandro Dimai (Col Drusci
Observatory, Italy) on Nov. 9.9 at mag about 16.2. Manzini's original offset was
11" west, 94" north. Nothing visible to mag about 19.0 on SAS images from Sept. 27.9.
A. V. Filippenko, M. Ganeshalingam, and F. J. D. Serduke, University of California,
Berkeley, report that inspection of CCD spectra (range 330-1000 nm), obtained on
Nov. 19 UT with the Shane 3-m reflector at Lick Observatory, reveals that this object
is indeed a nova. Very strong H_alpha emission is present, with FWHM about 2500
km/s. Considerably weaker H_beta, Fe II, and other emission lines are visible, as well.
(2004-11b) K. Hornoch's (see M31N 2004-03a, above) discovery from R-band CCD frames.
Additional R-band magnitudes: Oct. 10.3, [22 (VATT image; cf. 2004-10a); 22.908, [21
(Ondrejov image); Nov. 5.890, 16.6; 7.852, 17.1; 11.904, 17.4; 14.805, 17.3;
15.718, 17.2; 24.718, 17.5; 25.773, 17.6; 29.796, 17.9; 29.817, 17.9.
Yamaoka report of observations by Itagaki (see M31N 2004-11a). Rapid
decline seems apparent.
A. V. Filippenko, M. Ganeshalingam, and F. J. D. Serduke, University of California,
Berkeley, report that inspection of CCD spectra (range 330-1000 nm), obtained on
Nov. 19 UT with the Shane 3-m reflector at Lick Observatory, reveals that this object
is indeed a nova. Very strong H_alpha emission is present, with FWHM about 2500
km/s. Considerably weaker H_beta, Fe II, and other emission lines are visible, as well.
(2004-11c) Discovery by Federico Manzini (see M31N 2004-11a, above), confirmed on CCD
images taken on Nov. 16.83 (at mag 16.8). Astrometry by Behrend. Nothing visible
to mag about 19.0 on SAS images from Sept. 27.9.
Apparent independent discovery by Dimai (see M31N 2004-11a), 0.5-m telescope in
course of CROSS program. Six images taken during Nov. 16.83-16.86 UT. Nothing
visible to mag about 18.5 on CROSS image taken on Nov. 9.9.
(2004-11d) Discovered by Hornoch (see M31N 2004-03a) on co-added 420-sec and 1200-sec R-band
frames. R-band magnitudes by Hornoch: Nov. 15.718 UT, [18.5:; 24.718, 17.0:; 25.773,
17.3:; 29.796, 17.6:. Confirmed on co-added 2560-sec broad band H_alpha image taken on
Nov. 24.84 UT. Nothing visible at this position on numerous Lelekovice and Ondrejov images
back to 2002. Object has strong H_alpha emission, because is about 1 mag brighter in
broad band H_alpha filter than other field stars with the same R-band magnitude.
Additional H_alpha-filter image by Hornoch on Nov. 25.730 shows object at about the
same brightness as previous day.
(2004-11e) Discovered by Hornoch (see M31N 2004-03a) on co-added 640-sec R-band frames.
R-band magnitudes by Hornoch: Oct. 10.348 UT, [22 (VATT image; cf. 2004-10a);
Nov. 11.917, [19.5; 29.796, 17.6; 29.839, 17.6. Confirmed on co-added 1040-sec
broad band H_alpha image taken on Nov. 29.868. Nothing visible at this position on
numerous Lelekovice and Ondrejov images back to 2002. Object has very strong H_alpha
emission, being about 1.6 mag brighter in a broadband H_alpha filter than other
field stars with the same R-band magnitude. Discovery reported to CBAT on 11/29/04.
Independent discovery by Marco Fiaschi, Dario Tiveron, and Francesco Di Mille
(see M31N 2004-07a, above). An image of the same field taken with an H_alpha filter on July
7 showed nothing at this position (limiting mag 18). Discovery reported to CBAT on 12/1/04.
(2004-11f) Discovered by Fiaschi, Tiveron, and De Mille (see M31N 2004-07a, above).
Additional H_alpha magnitudes: 2004 July 7, [18; Dec. 7.712, 18.5:.
(2004-12a) Discovered by Hornoch (see M31N 2004-03a) on co-added 600-sec R-band frames;
confirmed on co-added 1040-sec R-band images taken on Dec. 30.767 UT. Nothing visible
at this position on numerous Lelekovice and Ondrejov images back to 2002. R-band
magnitudes by Hornoch: 2004 Dec. 18.068 UT, [22 (3.5-m WIYN telescope image
obtained by P. Garnavich); 21.856, 19.2 (prediscovery); 30.730, 16.8; 30.767, 16.9;
2005 Jan. 6.793. 18.1; 7.891, 18.1; 9.724, 18.3; 9.926, 18.4; 10.776, 18.5; 11.719,
18.4; 13.712, 18.8; 15.702, 18.6; 15.924, 18.8; 16.900, 18.8; 23.734, 19.4:; 5.731, 19.7.
(2005-01a) Discovery report published on IAUC 8461. Spectroscopic confirmation published
on IAUC 8462. Follow-up photometry published on IAUC 8479.
(2005-02a) Discovery by Marco Migliardi at Col Drusci Observatory with 0.5-m telescope
(communicated by A. Dimai) in the course of the CROSS program. Five unfiltered CCD
images obtained Feb. 18.77-18.78 UT. Nothing visible at this position on CROSS images
taken on 2004 Nov. 9.9 (limiting mag about 18.5). Confirmed on images taken on Feb.
22.75-22.76 at mag 18.0.
(2005-05a) Discovered by K. Hornoch (see M31N 2004-03a) and P. Kusnirak on seven 120-sec
R-band images taken with the Ondrejov Observatory 0.65-m reflector (+ AP7p CCD camera).
R-band magnitudes by Hornoch: Jan. 2.821 UT, [19.8; Mar. 20.765, [19.0:;
May 16.066, 17.2; 18.461, 18.42 (VATT image from P. Garnavich and B. Tucker);
19.452, 18.35 (Garnavich and Tucker); 20.042, 18.4 (image taken with the 0.65-m
telescope at Ondrejov by Hornoch); 21.039, 18.4 (Hornoch). This object shows very
strong H_alpha emission, because is about 1.6 mag brighter in S-Vilnius filter than
other field stars with the same R-band magnitude. Nothing visible at this position
on numerous Lelekovice and Ondrejov images back to 2002.
(2005-05b) Discovery by K. Hornoch (see M31N 2004-03a), P. Garnavich, and B. Tucker
on co-added 420-sec R-band and 240-sec S-Vilnius-band CCD frames taken with
the 1.83-m Vatican Advanced Technology Telescope at Mt. Graham. Nothing visible
on archival images from years 2003-2004 down to R = 22. Strong H_alpha emission.
Additional R-band magnitudes: 2004 Oct. 10.302 UT, [22; 2005 Feb. 4.172, [21.5;
May 18.461, 20.2 (poor conditions).
(2005-06a) Discovery by K. Hornoch (see M31N 2004-03a) and D. Mackey on six co-added
120-sec R-band and two co-added 300-sec H_alpha CCD frames taken by D. Mackey
with the 2.5-m Isaac Newton Telescope (INT) at La Palma. Nothing visible on archival
images from the years 2003-2004 down to mag R = 22. Independent discovery by
Koichi Itagaki (Teppo-cho, Yamagata, Japan; communicated via Syuichi Nakano, Sumoto,
Japan) on six unfiltered CCD survey frames taken on June 17 with a 0.60-m f/5.7
reflector; nothing visible at this location on a frame taken by Itagaki on
June 8.704 (limiting red mag 19.0). Additional R-band magnitudes reported by
Hornoch: 2004 Dec. 18.068 UT, [22 (3.5-m WIYN telescope R-band image obtained by
P. Garnavich); 2005 June 6.443, [20.8 (2.1-m Kitt Peak telescope image obtained
by B. Mueller); 14.181, 17.7. H_alpha magnitudes: 2000 Aug. 6.233, [20
(2.5-m INT H_alpha image obtained by D. Carter); 2005 June 14.195, 17.6.
(2005-06b) Discovery by K. Hornoch (see M31N 2004-03a) and D. Mackey on six co-added
120-sec R-band and two co-added 300-sec H_alpha CCD frames taken by D. Mackey
with the 2.5-m Isaac Newton Telescope (INT) at La Palma. Nothing visible on archival
images from the years 2003-2004 down to mag R = 22. Additional R-band magnitudes
reported by Hornoch: 2004 Dec. 18.068 UT, [22 (3.5-m WIYN telescope R-band image
obtained by P. Garnavich); 14.181, 18.1. H_alpha magnitudes: 2000 Aug. 6.233, [20
(2.5-m INT H_alpha image obtained by D. Carter); 2005 June 14.195, 17.3.
(2005-06c) Discovered by Marco Fiaschi, Luca Corona, Norman Stefani, and Ebrahim
Amini Biparva at the Astronomical Observatory 'G. Colombo' near Padova, Italy,
on CCD images taken with a 41-cm f/4.84 Newtonian reflector and through an H_alpha
filter (6.3-nm FWHM). Independent discovery by K. Hornoch (see M31N 2004-03a)
and N. Walton on Sloan r-band CCD frames taken by Walton with the 2.5-m Isaac
Newton Telescope (INT) at La Palma; nothing visible at this location on archival
images from the years 2003-2004 down to mag R = 22. Additional R-band magnitudes
reported by Hornoch: 2004 Dec. 18.068 UT, [22 (3.5-m WIYN telescope R-band image
obtained by P. Garnavich); 2005 June 14.181, [20.5 (2.5-m INT R-band image obtained
by D. Mackey); 24.198, 17.25. Z. Kereszty (Gyorujbarat, Hungary) reports the
following magnitudes obtained on July 17.916: V = 17.7, R = 17.6.
(2005-07a) Discovered by Hornoch (see M31N 2004-03a, above) on co-added 920-sec R-band frame.
Additional R-band magnitudes by Hornoch: July 2.347 UT, [21.7 (image obtained by
T. Farnham using 4-m Mayall telescope at Kitt Peak); 12.993, [19.5 (image obtained
by P. Kusnirak at Ondrejov); 23.929, [19.0; 27.909, 18.4; 29.919, 17.4. Nothing visible
at this position on numerous Lelekovice and Ondrejov images back to 2002.
(2005-09a) Discovered by Federico Manzini (Stazione Astronomica di Sozzago, Novarra,
Italy) in the course of the SAS Supernova Search with the 0.4-m telescope on five
unfiltered CCD images taken on Sept. 13.9 (precise position measured by Raoul Behrend,
Geneva Observatory). Images taken on Sept. 14.1 by Roberto Crippa (Tradate, Italy),
confirm the presence of the new object. SAS images of M31 taken on Aug. 7.9, 9.9,
and 12.9 show nothing at the position of the apparent nova (limiting mag about 19.0).
H. Yamaoka (Kyushu University) reports the following prediscovery red magnitudes from
CCD frames taken by K. Itagaki: Sept. 9.560, [19.0; 13.533, 17.4; 13.534, 17.3.
Evgeni Ovacharov (Astronomy Department, Sofia University) reports his astrometry,
offsets, and magnitude (tabulated above) from four CCD frames taken with the 50-cm
Schmidt telescope at NAO Rozhen, Bulgaria.
(2005-09b) Discovered by R. Quimby, P. Mondol, P. Hoeflich, and J. C. Wheeler,
University of Texas; and C. Gerardy, Imperial College, on unfiltered CCD images
taken with the 0.45-m ROTSE-IIIb telescope at the McDonald Observatory. Approximate
magnitudes: Aug. 31.23 UT, [18.7, Sept. 1.23, 18.0; 2.23, 16.5; 15.19, 17.1.
D. C. Leonard, California Institute of Technology, reports that a CCD spectrum
obtained at the 5-m Palomar Hale telescope (+ double spectrograph in polarimetry
mode; range 470-900 nm) on Sept. 7 UT shows several features characteristic of a young
nova entering the early nebular phase, such as strong Balmer emission lines lacking
P-Cyg absorption, Na I 589.4-nm, and several strong Fe II emission lines (including
those at 492.3 and 501.8 nm). He I features are weak or absent. The FWHM of H-alpha
is 4400 km/s. The observed line peaks are blueshifted from the rest wavelengths by
about -700 km/s, making an association with M31 plausible.
(2005-09c) Discovered by R. Quimby et al. (see M31N 2005-09b, above). Additional approximate
ROTSE-IIIb magnitudes: Sept. 20.18 UT, [17.6; 23.21, 16.0. Spectroscopic confirmation
reported by P. Reig et al. (http://www.astronomerstelegram.org/?read=618).
(2005-10a) Dicovered by R. Quimby, M. Sellers, P. Hoeflich, J. C. Wheeler, and C. Gerardy
(see M31N 2005-09b, above). Additional approximate ROTSE-IIIb magnitudes: Oct. 10.15, [17.3;
12.12, 16.2. Discovered independently by Marco Fiaschi, Fiorangela La Forgia, and
Elisa Portaluri (see M31N 2005-06c, above).
(2005-10b) Discovered by Hornoch (see M31N 2004-03a) and M. Wolf on co-added 900-sec
R-band frame taken by M. Wolf. R-band magnitudes by Hornoch: Oct. 9.362 UT, [21
(image taken by P. Garnavich and C. Kennedy using 1.83-m VATT at Mt. Graham); 14.808,
[18.8; 16.816, 17.6; 19.735, 17.9; 26.781, 17.9; 26.824, 18.2 (image taken by M. Wolf
at Ondrejov). Nothing visible at this position on numerous Lelekovice and Ondrejov images
back to 2002.
(2006-01a) Discovered by R. Quimby, F. Castro, M. Sellers, P. Hoeflich, E. L. Robinson,
and J. C. Wheeler, University of Texas; and A. Shafter, San Diego State University
(see M31N 2005-09b, above). Additional approximate ROTSE-IIIb magnitudes: 2005 Dec. 31.08
UT, [17.8; 2006 Jan. 9.08, 16.9; 14.08, 15.9; 19.09, 17.0. The object increased
irregularly in brightness for ten days to Jan. 14, its light curve suggestive of either
a nova or a bright, unusual variable star such as a luminous blue variable.
(2006-02a) Discovered by K. Hornoch (see M31N 2004-03a) and M. Wolf on co-added 600-sec
R-band frame taken by M. Wolf with the 0.65-m telescope at Ondrejov. R-band magnitudes
by Hornoch: 2005 Dec. 6.227 UT, [22 (image taken by P. Garnavich and J. Gallagher using
the 1.83-m VATT at Mt. Graham); 2006 Jan. 29.734, [19.5 (K. Hornoch, Lelekovice, Czech
Rep.); Feb. 2.748, 18.0 (image taken by M. Wolf at Ondrejov); 4.764, 19.2 (K. Hornoch,
Lelekovice); 4.846, 19.03 (image obtained by M. Burleigh and S. Casewell using 2.5-m Isaac
Newton Telescope at La Palma; position end figures measured by Hornoch: 50s.68, 49".9).
Nothing is visible at this position on numerous Lelekovice and Ondrejov images back to 2002.
(2006-04a) Discovered by Koichi Itagaki, Teppo-cho, Yamagata, Japan, on seven 60-s
unfiltered frames taken around Apr. 28.77 UT with a 0.60-m f/5.7 reflector (limiting mag
19.5). Nothing was visible at this location on his many past frames including one taken
on 2005 Oct. 27 (limiting magnitude 20.5) and on the most recent survey frame from 2006
March 6. Confirming observation on Apr. 29.76 shows the nova at mag 17.0. Communicated
by S. Nakano, Sumoto, Japan. [Report received on Apr. 28]
Independent discovery by W. Pietsch, Max-Planck-Institut fuer Extraterrestrische Physik
(MPE); V. Burwitz, MPE and Observatorio Astronomico de Mallorca (OAM); and J. Rodriguez and
A. Garcia, OAM, on rgb and unfiltered CCD images with the "Bradford Robotic Telescope Galaxy"
(365-mm f/11 Schmidt-Cassegrain reflector + 0.67 focal reducer and FLI MaxCAM ME2 camera
with 1000 x 1000 pixels) at the Tenerife Observatory. Additional magnitudes (using R
magnitudes from USNO-B1 catalogue): Mar. 12.865 UT, [17.5 (rgb); Apr. 28.263, 16.1; May
7.154, 17.3 (OAM 0.35-m f/10 Schmidt-Cassegrain reflector + SBIG STL-1001 camera).
[NOTE: Pietsch's report was received on May 8.]
(2006-06a) Discovered by Koichi Itagaki, Teppo-cho, Yamagata, Japan on ten or more survey
frames taken around June 1.74 UT (limiting mag 20.0) using a 0.60-m reflector + unfiltered
CCD (communicated by S. Nakano). The star had no motion during 30 min and nothing was
visible at this location on his recent survey frames from May 21 (limiting mag 19.5).
A CCD frame taken by Itagaki on June 3.7355 shows the new object at mag 17.9 and position
end figures 11s.77, 44".7.
(2006-06b) Discovered by K. Hornoch (see M31N 2004-03a), P. Kusnirak and P. Garnavich et al.
a on co-added 1380-sec R-band CCD frame taken with the 0.65-m telescope at Ondrejov and
on a co-added 180-sec R-band CCD frame taken with the 1.83-m VATT at Mt. Graham. R-band
magnitudes by Hornoch: 2005 Dec. 6.227 UT, [22 (image taken by P. Garnavich and J.
Gallagher using 1.83-m VATT at Mt. Graham); 2006 Jan. 29.734, [19.5 (K. Hornoch, Lelekovice);
Feb. 4.846, [22 (image obtained by M. Burleigh and S. Casewell using the 2.5-m Isaac Newton
Telescope at La Palma); May 14.065, 18.5 (K. Hornoch, Ondrejov, prediscovery); June 6.018,
18.6 (image taken by P. Kusnirak, Ondrejov); 6.467, 18.84 (image taken by P. Garnavich et al.,
1.83-m VATT at Mt. Graham). Nothing visible at this position on numerous Lelekovice and
Ondrejov images back to 2002.
(2006-08a) Discovered by K. Itagaki (Teppo-cho, Yamagata, Japan, 0.60-m f/5.7 reflector) on
unfiltered CCD images (communicated by S. Nakano, Sumoto, Japan). Position given as R.A. =
0h44m32s.45 +/- 0s.02, Decl. = +41o35'42".8 +/- 0".2 (equinox 2000.0). Itagaki provides the
following additional unfiltered magnitudes for the apparent nova: Aug. 6, [19.3; 13, [18.7;
16.518, 18.0; 19.568, 17.2; 20.575, 17.3; 24.585, 19.0; Sept. 15.584, 18.3.
(2006-09a) Discovered by K. Itagaki (Teppo-cho, Yamagata, Japan, 0.60-m f/5.7 reflector) on
unfiltered CCD images (communicated by S. Nakano, Sumoto, Japan). Position given as R.A. =
0h42m33s.16 +/- 0s.02, Decl. = +41o10'06".8 +/- 0".1 (equinox 2000.0). Itagaki provides the
following unfiltered magnitudes for the apparent nova: Sept. 1.588 UT, [20.0; 3.5161, 16.5;
3.5202, 16.4; 3.5384, 16.3; 3.5505, 16.2; 3.5631, 16.1; 3.5768, 16.0; 3.5976, 16.1; 3.6497,
16.2; 3.7915, 16.3; 3.7998, 16.4; 4.4994, 17.2; 4.5381, 17.3; 4.7858, 17.4; 5.5678, 17.8;
5.7057, 17.9; 5.7540, 18.0; 5.7580, 18.1. K. Kadota (Ageo, Saitama-ken, Japan) reports
position end figures 33s.16, 07".0, and unfiltered CCD mag 16.2, from an image taken on
Sept. 3.6606 with a 0.25-m f/5.0 reflector. Details on CBET 615.
(2006-09b) Discovered by K. Hornoch (see M31N 2004-03a) on co-added 360-sec R-band CCD frame
taken with the 0.35-m telescope at Lelekovice, Czech Republic; apparent nova is visible
on single 60-sec images used for co-added image. R-band magnitudes by Hornoch: 2006 June
6.467 UT, [21.1 (P. Garnavich and A. Karska, 1.83-m VATT at Mt. Graham); Sept. 13.066,
[20.0 (M. Wolf, 0.65-m reflector at Ondrejov); 14.876, 17.0 (K. Hornoch, 0.35-m reflector
at Lelekovice). Nothing visible at this position on numerous Lelekovice and Ondrejov images
back to 2002.
Independent discovery by Vadim Burwitz, W. Pietsch, A. Stefanescu, and F. Schrey,
Max-Planck-Institut fuer extraterrestrische Physik; with D. Hatzidimitriou, P. Reig, G.
Papamastorakis, Department of Astrophysics, University of Crete, on four 75-sec R-filtered CCD
images obtained at the 1.3-m Ritchey-Chretien f/7.5 telescope at Skinakas Observatory, Crete,
Greece using the Roper CCD Camera (with a SITE 1000x1000 chip). Positional uncertainty
given as 0".11. A previous image from 2006 Sept. 14.0465 UT shows no object at the
position of the nova (limiting magnitude 18.8); magnitudes are from a photometric solution
using R magnitudes of the Massey M31 catalogue.
(2006-09c) Discovered by Koichi Itagaki (Teppo-cho, Yamagata, Japan) on eight frames taken
around 2006 Sept. 18.583 UT with 30- to 60-sec exposures (limiting magnitude 20.0) using
a 0.60-m f/5.7 reflector + unfiltered CCD. Additional CCD magnitudes from Itagaki:
Sept. 15.53, [20.0; 18.806, 16.5. K. Kadota (Ageo, Saitama-ken, Japan) reports that an
unfiltered CCD image taken with a 0.25-m f/5.0 reflector on Sept. 18.6476 shows the new
object at mag 16.8 and position end figures 42s.36, 46".0 (limiting mag 18.1; magnitudes
from Tycho-2 Catalogue). Itagaki's measures of his Sept. 18.806 image yields position end
figures 42s.39, 45".5. Above information on 2006-09c from Japanese observers all communicated
(forwarded) by S. Nakano (Sumoto, Japan).
Independently discovered by R. Quimby (University of Texas) from unfiltered CCD images
taken on Sept. 18.14 UT with the 0.45-m ROTSE-IIIb telescope at the McDonald Observatory.
The new object was not detected in ROTSE-IIIb data from Sept. 12.45 (limiting mag about 16.9).
A finding chart for the transient can be found at:
http://grad40.as.utexas.edu/~quimby/tss/charts/nova9.png
(2006-10a) Discovered by K. Hornoch (see M31N 2004-03a) on co-added 600-sec R-band CCD frames
taken with the 0.35-m telescope at Lelekovice under excellent conditions. R-band magnitudes
by Hornoch: 2006 Feb. 4.846 UT, [22 (image obtained by M. Burleigh and S. Casewell using
2.5-m INT at La Palma); Oct. 17.830, [20.1 (K. Hornoch, 0.35-m at Lelekovice); 22.751, 19.2
(Hornoch, prediscovery); 25.812, 18.7 (Hornoch); 25.970, 18.6 (P. Kusnirak, 0.65-m reflector
at Ondrejov). Nothing visible at this position on numerous Lelekovice and Ondrejov images
back to 2002.
(2006-10b) Discovered by Koichi Itagaki (Teppo-cho, Yamagata, Japan; communicated via S.
Nakano, Sumoto, Japan, on Oct. 31 UT) on his unfiltered CCD frames taken around Oct. 31.583
UT using a 0.60-m f/5.7 reflector (limiting magnitude 20.5). Nothing visible at this location
on Itagaki's image from Oct. 30.530 (limiting mag 20.0). Itagaki adds that the apparent
nova faded to mag 17.5 by Nov. 1.424 (when he measured position end figures 27s.47, 09".9).
Independently discovered by R. Quimby and F. Castro (University of Texas) on unfiltered
CCD images taken around Oct. 31.09 (at mag about 16.4) and Nov. 1.08 UT (at mag about 16.7)
with the 0.45-m ROTSE-IIIb telescope at the McDonald Observatory; nothing visible at this
position in ROTSE-IIIb data from Oct. 29.08 (limiting mag about 17.3). A finding chart for
the transient can be found at: http://grad40.as.utexas.edu/~quimby/tss/charts/nova11.png
(communicated to the CBAT on Nov. 1 UT). [reported anonymously]
(2006-11a) Discovered by Koichi Itagaki (Teppo-cho, Yamagata, Japan; communicated via S.
Nakano, Sumoto, Japan) on unfiltered CCD frames taken with a 0.60-m f/5.7 reflector.
Additional magnitudes by Itagaki: Nov. 21.657 UT, [19.5; 24.668, 17.9 (prediscovery);
25.494, 17.4. Itagaki provides position end figures 56s.81, 18".5 from his Nov. 24 image,
and 56s.79, 18".6 from his Nov. 25.494 image. K. Kadota (Ageo, Japan, 0.25-m f/5.0 reflector
+ unfiltered CCD) reports mag 17.3 on Nov. 25.627, with position end figures 56s.78, 18".6.
(2006-11b) Discovered A. Riffeser (University Observatory, Munich) and S. Geier on
three 300-sec R-filtered CCD images obtained at the 0.8-m Ritchey-Chretien f/12.4
telescope at Wendelstein Observatory, Germany, using the MONochromatic Image CAmera
with a Tektronix (SITe) TK1024 1kx1k chip. Positional uncertainty given as 0".2. A
previous image from 2006 Nov. 16.9903 UT shows no object at the position of the nova
(limiting magnitude 19.6). Confirming observations by Vadim Burwitz and Wolfgang Pietsch,
Max-Planck-Institut fuer Extraterrestrische Physik, Garching; and Kirill Antonyuk, Crimean
Astrophysical Observatory (CrAO); R-band magnitudes obtained from images obtained by
Antonyuk with the CrAO AZT-11 1.25-m telescope: Nov. 18.784, [20.5; 19.739, 18.5; 20.703,
18.7. Position end figures 44s.06, 01".9 (FLI 1024x1024-pixel CCD camera binned to 512x512
pixels; plate scale 0".69/binned-pixel). The R-filter magnitudes for each night were
determined from the sum of five stacked R-filter images (each 180 sec long, giving a total
exposure time of 900 sec); comparison-star magnitudes from the Massey catalogue.
(2006-11c) Discovered by K. Hornoch (see M31N 2004-03a), M. Wolf, and P. Zasche on co-added
720-sec R-band CCD frames taken by M. Wolf and P. Zasche with the 0.65-m telescope at
Ondrejov. R-band magnitudes measured by Hornoch: 2006 Nov. 8.824 UT, [19.8 (observer
Hornoch, 0.35-m telescope at Lelekovice); 15.796, [19.8 (Lelekovice); 30.808, 17.3 (M. Wolf
and P. Zasche, 0.65-m telescope at Ondrejov); Dec. 1.885, 18.1 (P. Kusnirak, 0.65-m telescope
at Ondrejov). Nothing visible at this position on numerous Lelekovice and Ondrejov images
back to 2002.
(2006-12a) Discovered by Arno Riffeser, S. Wilke, and C. Ries (University Observatory, Munich)
on two 300-sec R-band CCD images obtained by Wilke and Ries at the 0.8-m Ritchey-Chretien
f/12.4 telescope at Wendelstein Observatory (Germany) using the MONochromatic Image CAmera
with a Tektronix (SITe) TK1024 1000x1000 chip with 24-micron-square pixels; positional
uncertainty given as 0".1. Additional R-band magnitudes for the apparent nova: 2006 Dec.
14.88 UT, [21.7; 15.943, 19.6.
Discovered independently by K. Hornoch (see notes for M31N 2004-03a, above) on
co-added 660-sec R-band CCD frame (the apparent nova is visible also on single 60-sec
images used for co-added image) taken with the 0.35-m telescope at Lelekovice. R-band
magnitudes by Hornoch: 2006 Feb. 4.846 UT, [22 (image obtained by M. Burleigh and S.
Casewell using 2.5-m INT at La Palma); Dec. 14.712, [20.2 (Hornoch). Nothing visible at
this position on numerous Lelekovice and Ondrejov images back to 2002.
(2006-12b) Discovered by K. Hornoch (see M31N 2004-03a, above) on a co-added 2100-sec R-band
CCD frame taken with the 0.35-m telescope at Lelekovice. R-band magnitudes by Hornoch:
2006 Feb. 4.846 UT, [22 (image obtained by M. Burleigh and S. Casewell using 2.5-m INT at
La Palma); Dec. 14.712, [20.2 (Hornoch, 0.35-m telescope at Lelekovice); 23.674, 18.8 (Hornoch;
prediscovery); 27.722, 18.0 (Hornoch). Nothing visible at this position on numerous
Lelekovice and Ondrejov images back to 2002.
(2006-12c) Discovered by K. Hornoch (see 2004-03a) on co-added 2100-sec and 780-sec
R-band CCD frames taken with the 0.35-m telescope at Lelekovice. R-band magnitudes by
Hornoch: 2006 Feb. 4.846 UT, [22 (image obtained by M. Burleigh and S. Casewell,
2.5-m INT at La Palma); Dec. 14.712, [19.9 (K. Hornoch, 0.35-m telescope at Lelekovice);
23.674, [19.0 (Hornoch); 26.857, 17.6 (Hornoch); 27.722, 17.7 (Hornoch). Nothing visible
at this position on numerous Lelekovice and Ondrejov images back to 2002.
(2006-12d) Discovered by K. Hornoch (see 2004-03a) on co-added 2100-sec and 780-sec R-band
CCD frames taken with the 0.35-m telescope at Lelekovice. R-band magnitudes by Hornoch:
2006 Feb. 4.846 UT, [22 (image obtained by M. Burleigh and S. Casewell, 2.5-m INT at La Palma);
Dec. 14.712, [19.9 (K. Hornoch, 0.35-m telescope at Lelekovice); 23.674, [19.0 (Hornoch);
26.857, 17.6 (Hornoch); 27.722, 17.5 (Hornoch). Nothing visible at this position on numerous
Lelekovice and Ondrejov images back to 2002.
(2007-01a) Discovered by K. Hornoch (see 2004-03a) on co-added 1740-sec R-band CCD frame
taken with the 0.35-m telescope at Lelekovice; visible on single 60-s images used for the
co-added image. R-band magnitudes by Hornoch, from his own images unless otherwise noted:
2006 Feb. 4.846 UT, [22 (image obtained by M. Burleigh and S. Casewell using 2.5-m INT at
La Palma); Dec. 23.674, [19.9; 26.825, [20.1; 2007 Jan. 14.694, 18.4 (prediscovery); 14.726,
18.3 (prediscovery); 20.881, 17.5; 21.831, 17.0. Nothing visible at this position on
numerous Lelekovice and Ondrejov images back to 2002.
E. Ovcharov and A. Valcheva, Astronomy Department, Sofia University, report the precise
position and magnitude tabulated above from an R-band 300-sec CCD frame taken with the
50/70-cm Schmidt telescope at NAO Rozhen, Bulgaria.
(2007-02a) Discovered by R. Quimby and F. Castro (University of Texas) from
unfiltered CCD images taken around Feb. 7.09 (at mag about 17.2) and 8.09 UT
(mag about 16.3) with the 0.45-m ROTSE-IIIb telescope at the McDonald
Observatory. The new object was found by subtracting a co-addition of
ROTSE-IIIb images taken between 2004 Nov. and Dec. (limiting mag about 18.8),
and it was not detected in ROTSE-IIIb data from 2007 Feb. 6.09 (limiting mag
about 17.5). A finding chart for the transient can be found at:
http://grad40.as.utexas.edu/~quimby/tss/charts/nova12.png
(2007-02b) Discovered by K. Hornoch (see 2004-03a) on co-added 480-sec R-band CCD frame
taken with the 0.35-m telescope at Lelekovice. The new object is well visible on single
60-sec images used for co-added image. R-band magnitudes by Hornoch: 2006 Feb. 4.846
UT, [22 (image obtained by M. Burleigh and S. Casewell using 2.5-m INT at La Palma);
2007 Jan. 27.775, [19.9 (K. Hornoch); Feb. 3.798, 16.7 (Hornoch); 9.862, 17.3 (Hornoch);
14.795, 17.5 (Hornoch).
Nothing visible at this position on numerous Lelekovice and Ondrejov images back to 2002.
(2007-02c) Discovered by K. Hornoch (see 2004-03a) on co-added 1140-sec R-band CCD frame
taken with the 0.35-m telescope at Lelekovice. The new object is well visible on single
60-sec images used for co-added image. R-band magnitudes by Hornoch: 2006 Feb. 4.846 UT,
[22 (image obtained by M. Burleigh and S. Casewell using 2.5-m INT at La Palma); 2007
Jan. 27.775, [19.7 (Hornoch); Feb. 3.798, [19.1 (Hornoch); 9.862, 17.2 (Hornoch); 14.795,
18.3 (Hornoch); 14.815, 18.4 (Hornoch).
Nothing visible at this position on numerous Lelekovice and Ondrejov images back to 2002.
(2007-02d) Discovered by Koichi Itagaki (Teppo-cho, Yamagata, Japan) on ten unfiltered CCD
survey frames taken around Feb. 24.48 UT using a 0.60-m f/5.7 reflector; additional
magnitudes: Feb. 20.445, [19.0; 22.461, [16.5; 25.402, 17.2. Communicated by S. Nakano
(Sumoto, Japan).
(2007-03a) Discovered by K. Hornoch (see 2004-03a) on two co-added 720-sec R-band CCD
frames taken with the 0.65-m telescope at Ondrejov. The new object is visible very well
on single 60-sec images used for co-added images. R-band magnitudes by Hornoch: 2006
Feb. 4.846 UT, [22 (image obtained by M. Burleigh and S. Casewell using 2.5-m INT at La
Palma); 2007 Mar. 2.795, [20.0 (K. Hornoch, 0.65-m telescope at Ondrejov); 4.763, 15.8
(Hornoch); 4.774, 15.8 (Hornoch); 5.852, 16.3 (K. Hornoch, 0.65-m telescope at Ondrejov).
Nothing visible at this position on numerous Lelekovice and Ondrejov images back to 2002.
(2007-05a) Discovered by K. Hornoch (see 2004-03a) on co-added 960-sec R-band CCD
frame taken with the 0.65-m telescope at Ondrejov. Nova is visible on single 60-sec images
used for co-added images. R-band magnitudes by Hornoch: 2006 Feb. 4.846 UT, [22 (image
obtained by M. Burleigh and S. Casewell using 2.5-m INT at La Palma); 2007 Mar. 10.764,
[20.0 (K. Hornoch, 0.65-m telescope at Ondrejov); 15.767, [19.8 (image obtained by M. Wolf
using 0.65-m telescope at Ondrejov); May. 18.060, 18.5 (Hornoch); 19.060, 18.6 (Hornoch);
19.069, 18.4 (Hornoch). Nothing visible at this position on numerous Lelekovice and
Ondrejov images back to 2002.
(2007-06a) Discovered by Evgeni Ovcharov (Sofia University) and Antoniya Valcheva
(Institute of Astronomy; Sofia University) on R-band CCD frames taken with the 50/70-cm
Schmidt telescope at the National Astronomical Observatory, Rozhen, Bulgaria, via three
co-added 300-sec exposures. Discovered independently by K. Hornoch (see 2004-03a) and M.
Wolf on co-added 1260-sec R-band CCD frame taken with the 0.65-m telescope at Ondrejov;
the new object is visible on single 90-sec images used for co-added image, but nothing
visible at this position on numerous Lelekovice and Ondrejov images back to 2002.
Additional R-band magnitudes: 2006 Feb. 4.846 UT, [22 (image obtained by M. Burleigh and
S. Casewell using 2.5-m Isaac Newton Telescpoe at La Palma; reported by Hornoch); 2007
Mar. 10.774, [20.3 (K. Hornoch, 0.65-m reflector at Ondrejov); May 21.068, [19.5 (Hornoch);
June 12.051, [19.5 (Hornoch); 15.012, 18.9 (Ovcharov and Valcheva); 16.040, 19.7 (image
obtained by P. Kusnirak with the 0.65-m telescope at Ondrejov; reported by Hornoch);
19.028, 19.9: (Hornoch).
(2007-06b) Discovered by R. Quimby, P. Mondol, and J. Craig Wheeler, University of Texas;
E. Rykoff, F. Yuan, and C. Akerlof, University of Michigan; A. Shafter, San Diego State
University; and E. Ofek and M. Kasliwal, California Institute of Technology, on unfiltered
CCD images taken with the 0.45-m ROTSE-IIIb telescope at the McDonald Observatory.
The nova is coincident with the catalogued globular cluster in M31 known as Bol 111.
Also imaged at mag 16.9 on June 21.4 UT; estimated astrometric uncertainty +/- 0".3 in each
coordinate. Photometry from the Palomar 1.52-m telescope indicates that the source (including
light from the globular cluster) faded in the i band by 0.24 mag between June 21.374 and
22.469. A spectrum (range 420-890 nm) obtained on June 22.44 with the 9.2-m Hobby-Eberly
Telescope (+ Marcario Low-Resolution Spectrograph) by M. Shetrone and V. Riley shows that the
object is a nova: Broad emission features including H-alpha (HWZI about 3100 km/s), H-beta,
and H-gamma were detected, and the presence of N III 464.0-nm, blended with He II 468.6-nm,
suggests membership in the He/N class of novae. The lines are blueshifted by about 400 km/s,
consistent with the lineshift observed for Bol 111. A finding chart can be found at
http://grad40.as.utexas.edu/~quimby/tss/charts/nova13.png
(2007-07a) Discovered by D. Hatzidimitriou, Department
of Astrophysics, University of Crete (UC); V. Burwitz, S. Duscha, G. Kanbach, and W.
Pietsch, Max-Planck-Institut fuer Extraterrestrische Physik; and P. Reig and G.
Papamastorakis, UC, on four consecutive dithered R-filter CCD images obtained on July
5 with the 1.3-m Ritchey-Chretien f/7.5 telescope at Skinakas Observatory (Crete,
Greece) using the Roper CCD camera (with a SITE 1000-by-1000 chip). The position
uncertainty is given as +/- 0".1. The magnitudes by Hatzidimitriou et al. are from a
photometric solution using R magnitudes of the Massey M31 catalogue. R-band magnitudes:
2006 Feb. 4.846 UT, [22 (image obtained by M. Burleigh and S. Casewell using 2.5-m Isaac
Newton Telescope at La Palma); 2007 June 24.028, [20.3 (image obtained by P. Kusnirak
using 0.65-m telescope at Ondrejov Observatory); July 3.037, [19.9 (Hatzidimitriou et al.;
stacked image); 5.0481, 16.7 (Hatzidimitriou et al.); 5.0497-5.0528, 16.6
(Hatzidimitriou et al.); 6.989, 17.8 (K. Hornoch, 0.65-m telescope at Ondrejov Observatory).
(2007-07b) Discovered by Evgeni Ovcharov (Sofia University)
and Antoniya Valcheva (Institute of Astronomy, Sofia University) on three co-added 300-sec
R-band exposures obtained with the 50/70-cm Schmidt telescope at the National Astronomical
Observatory, Rozhen, Bulgaria.
Confirmed with prediscovery observations by a group including D. Hatzidimitiou, Department
of Astrophysics, University of Crete (UC); Wolfgang Pietsch, V. Burwitz, A. Stefanescu, and
H. Steine, Max-Planck-Institut fuer Extraterr. Physik, Garching; and P. Reig and G.
Papamastorakis, UC, as part of a monitoring campaign of the M31 central region for optical
nova candidates, using the 1.3-m Ritchey-Chretien f/7.5 telescope at Skinakas Observatory,
Crete, with a Roper CCD Camera (SITE 1000x1000 chip with 24-micron-square pixels) and
standard Johnson-R and broad (75-Angstroem) H_alpha filters. The object's identity as a
nova is confirmed, as it shows up as a bright H_alpha source. The following magnitudes are
determined from a photometric solution using R magnitudes of the Massey M31 catalogue for
both the H_alpha and R images: July 8.053, [H_alpha] = 18.0 +/- 0.3; July 9.058, R = [18.4;
July 10.042, [H_alpha] = 17.5 +/- 0.2; July 11.010, R = 17.7 +/- 0.1; July 11.042, [H_alpha]
= 17.1 +/- 0.1. The object was rising in H_alpha at least 3 days prior to its discovery
by Ovcharov and Valcheva. The position above by Hatzidimitiou et al. has an estimated
uncertainty of +/- 0".2. Note that the nova appeared to be 0.9 mag brighter in R than reported
by Ovcharov and Valcheva for about the same time on July 11.
(2007-07c) Discovered by a group including Vadim Burwitz,
Max-Planck-Institut fuer Extraterrestrische Physik (MPE) and Observatori Astronomic de
Mallorca (OAM); D. Hatzidimitriou, Department of Physics, University of Crete (UC);
A. Stefanescu, H. Steinle, and W. Pietsch, MPE; A. Manousakis, P. Reig, and G.
Papamastorakis, UoC; S. Cikota and A. Cikota, Observatorio Astronomico de La Sagra;
and S. Sanchez, OAM, on four consecutive dithered R-filter CCD images obtained on July
19.007, 19.009, 19.010, and 19.012 UT (with corresponding R magnitudes of 18.8, 18.7,
18.8, 18.5) at the 1.3-m Ritchey-Chretien f/7.5 telescope at Skinakas Observatory in Crete
using an Andor DZ436-BV CCD Camera (with a Marconi 2000x2000 chip with 13.5-micron-square
pixels). The apparent nova was also detected on three H_alpha images; a stacked image
centered at July 19.070 yields a corresponding H_alpha magnitude 18.3. The position above
has an estimated uncertainty of +/- 0".1. A stacked image from 2007 July 18.014 shows
no object at the position of the presumed nova (limiting R magnitude about 20.5). All
magnitudes given are from a photometric solution using R magnitudes in the Massey M31
catalogue. The apparent nova also appears at R = 18.5 on July 19.094 in stacked, unfiltered
images (thirty-two 30-sec frames) obtained with the 0.35-m f/2 reflector (+ SBIG ST-10 CCD
camera with a Kodak 2000x1500 chip with 6.8-micron-square pixels) of the Observatorio
Astronomico de La Sagra, Spain.
Discovered apparently independently by Koichi Itagaki, Teppo-cho, Yamagata, Japan
(communicated by S. Nakano, Sumoto), on unfiltered CCD survey frames taken around July
23.57 UT using a 0.60-m f/5.7 reflector. Nothing is visible at this location on a
frame taken on July 8.68 (limiting mag 19.0). A confirming unfiltered CCD image was
obtained on July 23.682 by K. Kadota (Ageo, Saitama-ken) with a 0.25-m f/5.0 reflector;
photometry via Tycho-2 catalogue.
(2007-07d) Discovered by W. Pietsch, Max-Planck-Institut fuer Extraterrestrische Physik
(MPE); V. Burwitz, MPE and Observatorio Astronomico de Mallorca (OAM); D. Hatzidimitriou,
Department of Physics, University of Crete (UC); H. Steinle, MPE; A. Slowikowska, UC;
A. Stefanescu, MPE; P. Reig and G. Papamastorakis, UC; S. Cikota and A. Cikota,
Observatorio Astronomico de La Sagra; S. Sanchez, OAM; and F. Haberl, G. Sala, and J.
Greiner, MPE, on images obtained at the 1.3-m Ritchey-Chretien f/7.5 telescope at Skinakas
Observatory, Crete, Greece, using an Andor DZ436-BV CCD camera (with a Marconi 2000 x 2000
chip with 13.5-micron-sq. pixels) and a Johnson standard R filter (four 100-s stacked
images) and a broad H-alpha filter (three 300-s stacked images). Astrometry measurement
with estimated uncertainty of 0".2. Additional R-band magnitudes for the apparent nova:
July 22.072 UT, [19.7; 25.942, 19.1; 26.972, 18.8; 28.084, 18.6. U-band magnitudes: July
28.097, 18.3; 29.101, 17.6. H-alpha magnitudes: July 19.070, [18.7; 29.071, 17.4.
All these magnitudes are from a photometric solution using R magnitudes of the Massey M31
catalogue. Unfiltered magnitudes from 240-s images obtained with a 0.45-m f/2.8 reflector
(+ SBIG STL-11000E CCD camera; 3008 pixels x 2674 pixels, each 9 x 9 microns square) at
the Observatorio Astronomico de La Sagra, Spain: July 28.097, 18.3; 29.101, 17.6
(photometric solution based on USNO-B1.0 catalogue). Magnitudes with the Swift UVOT
from approximately-1600-s UVW2-filter images: July 18.91, [20.9 (3-sigma); 24.19, [20.23
(3-sigma); 25.56, 20.10 +/- 0.30; 26.46, 20.23 +/- 0.31; 27.50, 20.08 +/- 0.28; 28.50,
20.15 +/- 0.33.
(2007-07e) Discovered by Vadim Burwitz and his group [see 2007-07d, above] on R-band images
with the 1.3-m Ritchey-Chretien f/7.5 telescope (+ Andor DZ436-BV CCD camera; 2000 x 2000,
13.5-micron x 13.5-micron pixels) at Skinakas Observatory; the Massey catalogue R-band data
were used for the photometric and astrometric solutions. Additional R-band magnitudes for
2007-07e: July 28.072, 17.3; 29.014, 17.2. Unfiltered thirty-one 60-sec stacked images
were obtained at the Observatorio Astronomico de La Sagra, Spain, with the 0.35-m f/2.0 telescope
(+ ST-10XME CCD camera; 2100 x 1500, 6.8-micron x 6.8-micron pixels); USNO-B1 catalogue R-band
data used for the photometric and astrometric solutions on July 26.940 (mag 16.8).
Unfiltered 240-sec images were also obtained with a 0.45-m f/2.8 reflector (+ STL-11000M CCD
camera; 4000 x 2700, 9-micron x 9-micron pixels); the USNO-B1 catalogue R-band data were
again used for the photometric and astrometric solutions for July 28.097 (mag 16.4) and
July 29.101 (mag 16.9).
(2007-08a) Discovered by R. Quimby, F. Castro, and J. C. Wheeler, University of Texas; and
F. Yuan and C. Akerlof, University of Michigan, on unfiltered CCD images taken around
Aug. 6.3 UT (at mag about 18.1) with the 0.45-m ROTSE-IIIb telescope at the McDonald
Observatory. Additional approximate ROTSE-IIIb magnitudes for 2007-08a: July 25.44,
[18.5; Aug. 8.3, 17.6; 9.33, 18.6. A finding chart for 2007-08a can be found at URL
http://grad40.as.utexas.edu/~quimby/tss/charts/nova14.png.
(2007-08b) Discovered by K. Hornoch (see 2004-03a) on a co-added 900-sec R-band CCD
frame taken with the 0.65-m telescope at Ondrejov; the apparent nova is visible on
single 180-sec images used for the co-added image. R-band magnitudes by Hornoch: 2006
Feb. 4.846 UT, [22 (image obtained by M. Burleigh and S. Casewell using 2.5-m INT at La
Palma); 2007 July 7.006, [20.0 (K. Hornoch, 0.65-m at Ondrejov); Aug. 14.969, 19.4
(Hornoch); 17.844, 19.6 (K. Hornoch, 0.65-m at Ondrejov). Nothing visible at this
position on numerous Lelekovice and Ondrejov images back to 2002.
(2007-08c) Discovered by A. Stefanescu, W. Pietsch, and V. Burwitz, Max-Planck-Institut
fuer Extraterrestrische Physik; D. Hatzidimitriou, Department of Physics, University of
Crete (UC); J. Poepsel, S. Binnewies, and H. Ruder, Mount Skinakas, Crete; and G.
Papamastorakis, UC, in ten stacked R-filtered CCD images (each with 60-sec exposure)
obtained on Aug. 30.018 UT at the 60-cm f/3 Ganymed telescope located at Skinakas
Observatory, Crete, Greece, using a STL11000M CCD camera. The object was confirmed
at mag 17.7 on CCD images with the same telescope using a broad H-alpha filter (four
120-s stacked images) obtained on Aug. 30.029. The position obtained for the nova
has an estimated uncertainty of 0".3. A stacked R image with the same instrumental
set-up onb Aug. 24.025 shows no object at the position of the nova candidate brighter
than the limiting R magnitude of about 19.2. All magnitudes given are from a photometric
solution using R magnitudes of the USNO-B1 catalogue. An additional stacked R image
(eight 60-s frames) with the same telescope on Aug. 31.038 confirms the nova at mag 17.5.
Discovered independently by K. Hornoch and M. Wolf, Ondrejov Observatory, on co-added
840-sec R-band CCD frame taken by Wolf with the 0.65-m telescope at Ondrejov. The apparent
nova is visible on single 120-sec images used for co-added image. R-band magnitudes by
Hornoch: 2006 Feb. 4.846 UT, [22 (image obtained by M. Burleigh and S. Casewell using
the 2.5-m INT at La Palma); 2007 Aug. 17.861, [19.7 (Hornoch, 0.65-m telescope at
Ondrejov); 30.987, 17.6 (image obtained by Wolf using 0.65-m telescope at Ondrejov).
Nothing visible at this position on numerous Lelekovice and Ondrejov images back to 2002.
F. Di Mille, Department of Astronomy, Padova University; N. Bonhomme, O. Ozdarcan,
C. Ruhland, and K. Stoyanov, School of the Network of European Observatories in the North
(NEON; cf. IAUC 7664), Asiago; and H. Navasardyan and E. Giro, Istituto Nazionale di
Astrofisica Osservatorio Astronomico di Padova, report that a spectrum (range 360-750 nm;
2.7-nm resolution) of M31N 2007-08c, obtained on Sept. 8.94 UT with AFOSC, confirms that
this object is indeed a nova; the spectrum shows strong H_alpha and weak H_beta and Fe
II (42) lines. The H_alpha line reveals a double-component profile that can be fitted
with two Gaussians having FWHM of about 1000 km/s, separated by about 1500 km/s. A
similar profile is also visible in the H_beta line.
(2007-08d) Discovered by W. Pietsch et al. (see information for 2007-08c, above) on nine
stacked 60-sec R-band images (mag 18.7) on Aug. 24.081 and four stacked 120-sec 12-nm
H-alpha-filtered images on Aug. 24.093 (mag 18.1) obtained with the 60-cm f/3 Ganymed
telescope. Confirming CCD images with the same instrument yielded magnitudes R = 18.1 on
Aug. 30.065 (seven 60-sec stacked images) and [H-alpha] = 18.2 on Aug. 30.076 (four 120-sec
stacked images). The positional uncertainty was given as 0".3; the apparent nova is
located 36'30" west and 46'54" south of the core of M31, in the outer disk of the galaxy.
All magnitudes given are from a photometric solution using R magnitudes from the USNO-B1
catalogue. No object is visible at the position of the apparent nova on either the
Digitized Sky Survey red image from 1989 Oct. 1 or the Kitt Peak 4-m telescope images of
M31 (Field 8) of the "Local Group" survey by Massey et al. (2006, AJ 131, 2478) from 2000
Oct. 2 (limiting R magnitude about 21.5).
(2007-10a) Discovered by Koichi Itagaki, Teppo-cho, Yamagata, Japan, on unfiltered CCD
survey frames taken around Oct. 5.606 UT using a 0.60-m f/5.7 reflector; communicated by
S. Nakano, Sumoto, Japan. Additional magnitudes by Itagaki: Oct. 2.505, [20.0; 5.735,
R = 16.3 (position end figures 55s.94, 22".0). Discovered independently by Koichi Nishiyama
(Kurume, Fukuoka-ken, Japan) and Fujio Kabashima (Miyaki-cho, Saga-ken, Japan) on five
unfiltered CCD frames (limiting mag 19.3) taken around Oct. 5.73 using a 40-cm f/9.8 reflector
(again communicated by Nakano). Additional magnitudes from Nishiyama and Kabashima:
Oct. 2 and 3, [19; 5.756, 16.7; and nothing visible at this position on the Digitized Sky
Survey. Confirming unfiltered CCD images by K. Kadota, Ageo, Japan, were taken around Oct.
5.75 using a 0.25-m f/5.0 reflector. Confirmed by Evgeni Ovcharov (Sofia University) and
Antoniya Valcheva (Institute of Astronomy) on three co-added 300-sec exposures R-band images
obtained with the 50-/70-cm Schmidt telescope (+ SBIG STL-11000M CCD camera) at the National
Astronomical Observatoryo, Rozhen, Bulgaria, on Oct. 5.868 (R = 16.5) and 6.070 (R = 16.8).
Nothing visible at this position on an image from Oct. 5.024 (limiting mag R about 20.0).
Discovered independently by Wolfgang Pietsch, Max-Planck-Institut fuer Extraterrestrische
Physik (MPE); V. Burwitz, MPE and Observatorio Astronomico de Mallorca (OAM); R. Stoss,
Astronomisches Rechen-Institut, Heidelberg and OAM; A. Updike and D. Hartmann, Clemson
University; and P. Milne and G. Williams, University of Arizona, on five stacked 60-sec
white-light CCD images obtained with the 30-cm f/9 Schmidt-Cassegrain REMO2 telescope of
the Observatori Astronomic de Mallorca (Costitx, Spain) with an SBIG STL-1001E CCD camera.
The object was confirmed on R-band CCD images obtained with the robotic 60-cm telescope
(+ E2V CCD 2000x2000 Livermore Optical Transient Imaging System "Super-LOTIS") located at
Steward Observatory, Kitt Peak, on two sets of eight, 60-sec stacked images, yielding
magnitudes 17.1 and 17.2 on Oct. 6.336 and 6.429, respectively. All magnitudes given are
obtained from a photometric solution using R magnitudes of the Massey M31 catalogue. Nothing
is visible at the position of the apparent nova on Super-LOTIS images from 2007 Oct. 4.338
(limiting magnitude R about 19.8). An OAM image from Oct. 7.108 yields R = 17.4 and
position end figures 55s.94, 22".1.
(2007-10b) Discovered by Vadim Burwitz and W. Pietsch, Max-Planck-Institut fuer
Extraterrestrische Physik; A. Updike and D. Hartmann, Clemson University; and P. Milne
and G. Williams, University of Arizona, on stacked 60-sec R-band CCD images obtained with
the robotic 60-cm telescope with "Super-LOTIS" (Livermore Optical Transient Imaging System,
with an E2V CCD, located at Steward Observatory, Kitt Peak). In addition to the tabulated
position above, they also give position end figures 29s.48, 13".5 (citing an uncertainty
of 0".2, though these three positions clearly show greater deviation than 0".2); all
magnitudes given are obtained from a photometric solution using R magnitudes of the Massey
M31 catalogue. No object is visible at the position of the apparent nova on Super-LOTIS
images from 2007 Oct. 12.398 (limiting R magnitude about 19.8).
Discovered independently by K. Hornoch (see 2004-03a) and P. Kusnirak on a co-added
900-sec R-band CCD frame taken with the 0.65-m telescope at Ondrejov (apparent nova faintly
visible on single 90-sec images used for co-added image). R-band magnitudes by Hornoch:
2006 Feb. 4.846 UT, [22 (image obtained by M. Burleigh and S. Casewell using 2.54-m INT
at La Palma); 2007 Oct. 8.735, [19.4 (K. Hornoch, 0.65-m telescope at Ondrejov); 13.720, 18.5
(K. Hornoch and P. Kusnirak, 0.65-m telescope at Ondrejov). Nothing visible at this position
on numerous Lelekovice and Ondrejov images back to 2002.
(2007-11a) Discovered by W. Pietsch and V. Burwitz, Max-Planck-Institut fuer
Extraterrestrische Physik, Garching; A. Updike, Clemson University (CU); P. Milne
and G. Williams, University of Arizona; and D. Hartmann, CU, on stacked R-band CCD
images obtained with the robotic 60-cm telescope (+ E2V 2000x2000 CCD) of the Livermore Optical
Transient Imaging System (Super-LOTIS) located at Steward Observatory, Kitt Peak.
on Nov. 2.28 and 2.37 UT with respective magnitudes of 16.9 and 17.0. Positional uncertainty
0".2. All measured magnitudes are obtained from a photometric solution using R magnitudes
from the Massey M31 catalogue. No object is visible (limiting R magnitude about 19.5) at
the position of the apparent nova on Super-LOTIS images from Nov. 1.27 and 1.36. Stacked
Super-LOTIS images on Nov. 3.27 and 3.35 yield magnitudes 17.6 and 17.7.
(2007-11b) Discovered by V. Burwitz and W. Pietsch, Max-Planck-Institut fuer
Extraterrestrische Physik; A. Updike, Clemson University (CU); P. Milne and G. Williams,
University of Arizona; and D. H. Hartmann, CU, and reported as "a slow optical nova candidate"
on eight stacked 60-sec R-band CCD images obtained with the Super-LOTIS set-up at Kitt Peak
(see information for 2007-11a, above). The new object was first clearly detected on Nov. 1.35
at R = 19.3, and by Nov. 9.37 it had brightened to R = 18.9. Estimated uncertainty in the
position is 0".3. Nothing visible at the location of 2007-11b on Super-LOTIS images obtained
on Oct. 13 (limiting R mag about 19.5).
Discovered independently by Evgeni Ovcharov, Sofia University; and Antoniya Valcheva,
Institute of Astronomy, on co-added 300-sec R-band CCD exposures taken with the 50/70-cm
Schmidt telescope (+ SBIG STL-11000M CCD camera) at the National Astronomical Observatory,
Rozhen, Bulgaria. Additional R-band magnitudes: Oct. 6.070 UT, [20.0:; 6.809, 19.7;
8.853, 18.6.
(2007-11c) Discovered by Koichi Itagaki (Teppo-cho, Yamagata, Japan; communicated by Syuichi
Nakano, Sumoto, Japan) on unfiltered CCD survey frames taken around Nov. 13.44 UT using
a 0.60-m f/5.7 reflector (tabulated position above for Nov. 13.442 is by Itagaki). Nothing
visible at this location on a frame taken by Itagaki on Nov. 8.468 (limiting mag 19.3).
Unfiltered CCD magnitude estimates for M31N 2007-11c by K. Nishiyama and F. Kabashima using
a 0.40-m reflector (communicated by Nakano): Nov. 14.546-14.570, 16.6-16.7; the Nov. 13.55
position tabulated above is an average of four measurements by Nishiyama and Kabashima from
these same images.
Independently discovered by V. Burwitz, W. Pietsch, and M. Henze, Max-Planck-Institut
fuer Extraterrestrische Physik; A. Updike, Clemson University (CU); P. Milne and G.
Williams, University of Arizona; and D. H. Hartmann, CU, on stacked 60-sec R-band CCD images
obtained with Super-LOTIS (see the notes for M31N 2007-11a, above). Additional R magnitudes:
Nov. 12.38, [19.5:; 13.38, 17.5.
Independently discovered by K. Hornoch (see 2004-03a, above) on co-added 450-sec R-band
CCD image taken under poor conditions with the 0.65-m telescope at Ondrejov; the apparent
nova is faintly visible on single 90-sec images used for the co-added image. Additional
R-band magnitudes measured by Hornoch: 2006 Feb. 4.846 UT, [21.5 (image obtained by M.
Burleigh and S. Casewell using 2.54-m INT at La Palma); 2007 Nov. 10.975, [20.1 (K. Hornoch,
0.65-m telescope at Ondrejov); 11.887, 19.7 (Hornoch, prediscovery; co-added 1350-sec R-band
image taken with the 0.65-m telescope at Ondrejov). Nothing is visible at this position on
numerous Lelekovice and Ondrejov images back to 2002.
(2007-11d) Discovered by Koichi Nishiyama (Kurume, Fukuoka-ken, Japan) and Fujio Kabashima
(Miyaki-cho, Saga-ken, Japan) on seven 20-sec unfiltered CCD frames taken around Nov. 17.57
UT using a 40-cm f/9.8 reflector (limiting magnitude 19.1). Nothing is visible at this
location on the Digitized Sky Survey. Additional magnitudes for M31N 2007-11d by Nishiyama
and Kabashima: Nov. 14.551, [19.2; 16.511, 17.7; 17.569, 16.9; 17.591, 17.0; 17.594, 16.9;
20.385, 14.9; 20.397, 15.0; 20.461, 15.1; 20.599, 15.1; 20.507, 15.3; 21.626, 15.3; 23.537,
15.8; 24.599, 16.0; 25.573, 16.2. The tabulated data above for 2007-11d on Nov. 16 and 17
are by Nishiyama and Kabashima; the tabulated data above for Nov. 19 are by K. Itagaki with
a 0.50-m f/6.0 reflector + unfiltered CCD (all data communicated by S. Nakano, Sumoto, Japan).
Announced on IAUC 8898.
(2007-11e) Discovered by Koichi Itagaki (Teppo-cho, Yamagata, Japan) on unfiltered CCD
survey frames taken around Nov. 28.39 UT using a 0.60-m f/5.7 reflector. Additional
magnitudes from Itagaki: Nov. 25.372, [19.0; 29.483, 16.6. Position end figures
measured from Nov. 29 frame: 47s.75, 03".7. Communicated by S. Nakano (Sumoto, Japan).
W. Pietsch et al. (details given as for 2007-12c, below) show M31N 2007-11e at
mag 17.7 on Dec. 13.77 UT.
(2007-11f) Discovered by Evgeni Ovcharov (Sofia University) and Antoniya Valcheva (Institute
of Astronomy) in five co-added 300-sec R-band exposures obtained with the 50/70-cm Schmidt
telescope (+ SBIG STL-11000M CCD camera) at the National Astronomical Observatory in Rozhen,
Bulgaria. Nothing is visible at the position of the apparent nova on images from Oct. 6.070
and Nov. 8.853 UT (limiting R magnitude about 20.0).
W. Pietsch, V. Burwitz, and M. Henze, Max-Planck-Institut fuer Extraterrestrische
Physik; A. Updike, Clemson University (CU); P. Milne and G. Williams, University of Arizona;
and D. H. Hartmann, CU, report, on behalf of the Super-LOTIS collaboration, that 2007-11f was
covered at the edge of their field-of-view in eight stacked 60-sec R-band CCD images obtained
with the Super-LOTIS set-up at Kitt Peak (see information for 2007-11a, above). The
tabulated astrometry above has an estimated uncertainty of 0".3. Nothing is visible at the
position of 2007-11f on Super-LOTIS images from Nov. 25.24 and earlier (limiting R magnitude
about 18.6).
(2007-11g) Discovered by Evgeni Ovcharov (Sofia University) and Antoniya Valcheva (Institute
of Astronomy) in five co-added 300-sec R-band exposures obtained with the 50/70-cm Schmidt
telescope (+ SBIG STL-11000M CCD camera) at the National Astronomical Observatory in Rozhen,
Bulgaria. Nothing is visible at the position of the apparent nova on images from Oct. 6.070
and Nov. 8.853 UT (limiting R magnitude about 20.0).
W. Pietsch, V. Burwitz, and M. Henze, Max-Planck-Institut fuer Extraterrestrische
Physik; A. Updike, Clemson University (CU); P. Milne and G. Williams, University of Arizona;
and D. H. Hartmann, CU, report, on behalf of the Super-LOTIS collaboration, that 2007-11g was
present in many prediscovery eight stacked 60-sec R-band CCD images obtained with the
Super-LOTIS set-up at Kitt Peak (see information for 2007-11a, above), suggesting that
2007-11g appears to be a slow nova. Available Super-LOTIS magnitudes: Oct. 30.38 UT, 18.8;
Nov. 1.38, 19.0; 4.32, 18.8; 4.37, 19.2; 5.31, 18.9; 5.37, 18.6; 6.37, 18.5; 7.37, 18.8;
8.37, 18.9; 9.37, 18.7; 10.37, 18.6; 12.26, 18.7; 13.27, 18.8; 14.26, 18.7; 14.34, 18.9;
15.26, 18.7; 15.34, 19.1; 17.26, 18.6; 17.34, 18.8; 18.25, 18.3; 18.34, 18.5; 19.25, 18.9;
19.34, 18.6. The tabulated astrometry above has an estimated uncertainty of 0".3. Nothing
is visible at the position of 2007-11g on Super-LOTIS images from Oct. 15.32 and earlier
(limiting R magnitude about 19.2).
(2007-12a) Discovered by Koichi Nishiyama (Kurume, Fukuoka-ken, Japan) and Fujio Kabashima
(Miyaki-cho, Saga-ken, Japan) on eight 30-sec unfiltered CCD frames taken around Dec. 5.52
UT with a 40-cm f/9.8 reflector (limiting magnitude 20.1); mean position from measuring six
frames: R.A. = 0h44m03s.52 +/- 0s.03, Decl. = +41o38'41".4 +/- 0".3 (equinox 2000.0).
Additional magnitudes from the discoverers: Dec. 5.524, 18.1; 5.531, 18.3; 5.533, 18.2;
5.546, 18.0; 5.563, 18.2; 8.585, 16.7; 8.586, 16.5. Nothing is visible at this location on
the discoverers' images from Dec. 3.428 (limiting mag 20.0) and 4.483 (limiting mag 19.7), and
nothing is present on the Digitized Sky Survey (no limiting magnitude or bandpass provided).
K. Nishiyama and N. Hashimoto, Bisei Spaceguard Center, report that they obtained 60-sec
unfiltered CCD exposures with a 1.0-m f/3.0 reflector (limiting magnitude 19.5), yielding
position end figures 03s.56 +/- 0s.04, 40".6 +/- 0".6, and magnitude 17.6-17.8; nothing is
visible at this location on a Bisei image from Nov. 20 UT (limiting mag 20). K. Kadota (Ageo,
Saitama-ken, Japan, 0.25-m f/5.0 reflector) reports position end figures 03s.55, 41".2
and mag 17.8 from an unfiltered CCD image obtained on Dec. 5.666. All the above information
from Japanese observers for 2007-12a communicated by S. Nakano (Sumoto, Japan).
(2007-12b) Discovered by Koichi Nishiyama (Kurume, Fukuoka-ken, Japan) and Fujio Kabashima
(Miyaki-cho, Saga-ken, Japan) on five unfiltered 30-sec CCD frames taken around Dec. 9.53 UT
using a 40-cm f/9.8 reflector (limiting magnitude 19.1). Mean position from measurements of
six frames for 2007-12b: R.A. = 0h43m19s.94 +/- 0s.01, Decl. = +41o13'46".6 +/- 0".1
(equinox 2000.0). Nothing is visible at this location on their past frames taken on
Dec. 5.529 and Dec. 8.574 (limiting mag 19.6 and 18.9, respectively), and nothing visible
on Digitized Sky Survey. Magnitudes for 2007-12b during Dec. 9.528-9.569: 16.1-16.2.
An unfiltered CCD frame taken on Dec. 9.638 by K. Kadota (Ageo, Saitama-ken, Japan, 0.25-m
f/5.0 reflector; limiting magnitude 19.0) yields position end figures 19s.95, 46".5 and
mag 16.3 (noting also that nothing is visible at this position on DSS images). All Japanese
data above for 2007-12b communicated by Syuichi Nakano (Sumoto, Japan).
Discovered independently by K. Hornoch (see 2004-03a) on a co-added 990-sec R-band CCD
frame taken with the 0.65-m telescope at Ondrejov, 2007-12b being well visible on single
90-sec images used for the co-added image. R-band magnitudes by Hornoch: 2006 Feb. 4.846
UT, [21.5 (image obtained by M. Burleigh and S. Casewell using 2.54-m INT at La Palma);
2007 Nov. 13.047, [19.1 (K. Hornoch, 0.65-m reflector at Ondrejov); Dec. 10.734, 17.0 (Hornoch).
Nothing is visible at this position on numerous Lelekovice and Ondrejov images back to 2002.
W. Pietsch et al. (details given as for 2007-12c, below) show M31N 2007-12b at
mag 17.1 on Dec. 13.77 UT.
(2007-12c) Discovered by Koichi Itagaki (Teppo-cho, Yamagata, Japan) on unfiltered CCD
survey frames taken around Dec. 14.38 UT using a 0.30-m f/7.8 reflector + unfiltered CCD at
his Takanezawa station in Tochigi-ken, Japan; his frame from Dec. 14.638 yields position
end figures 09s.58, 07".3, and mag 17.0. Confirmed by K. Kadota (Ageo, Japan, 0.25-m f/5.0
reflector + unfiltered CCD) as tabulated above. Kadota reports that a faint star is
visible close to this location at mag 19.6 on Digitized Sky Survey R-band plates from 1986
and 1989, suggesting that this might not be a nova in M31; a fits image from 1989
Oct. 1 (1.22-m Schmidt telescope; poor image) yields position end figures 09s.49, 07".8.
All data from Japanese observers for 2007-12c communicated by S. Nakano (Sumoto, Japan).
Discovered independently by W. Pietsch, Max-Planck-Institut fuer Extraterrestrische Physik
(MPE); V. Burwitz, MPE and Observatorio Astronomico de Mallorca (OAM); M. Henze, MPE; N.
Morales, Observatorio La Sagra (OLS); and J. Nomen, OAM and OLS, on three stacked 120-sec
unfiltered CCD images obtained with a 0.45-m f/2.8 reflector (+ SBIG STL-11000M CCD Camera;
3008 pixels x 2674 pixels, each pixel being 9 microns x 9 microns) at the Observatorio
Astronomico de La Sagra in Spain on Dec. 13.76. The position for the nova candidate has
an estimated uncertainty of 0".2. All magnitudes given were obtained from a photometric
solution using R magnitudes from the USNO-B1 catalogue. No object is visible (limiting
magnitude of about 18.0) at the position of 2007-12c on images with the same camera on Dec.
6.78, but it was visible at mag 16.8 on ten stacked 300-sec unfiltered CCD images obtained
with a 0.30-m f/2.8 reflector (+ Apogee Alta U16 CCD camera; 4000 x 4000 pixels, with each
pixel being 9 microns x 9 microns) at the same site on Dec. 12.95.
(2007-12d) Discovered by Koichi Nishiyama (Kurume, Fukuoka-ken, Japan) and Fujio Kabashima
(Miyaki-cho, Saga-ken, Japan) on five unfiltered CCD 30-sec frames taken around Dec. 17.57
UT using a 40-cm f/9.8 reflector (limiting magnitude 19.2). Six measurements of 2007-12d
from exposures taken during Dec. 17.57-18.44 yields position end figures 54s.94 +/- 0s.02,
47".6 +/- 0".5. Nothing is visible at this position on the Digitized Sky Survey.
Additional magnitudes for 2007-12d from Nishiyama and Kabashima: Dec. 15.468, [18.1;
16.514, [19.1; 17.575, 16.8; 17.631, 16.4; 17.632, 16.5; 17.633, 16.7; 18.439, 17.7. K.
Kadota, Ageo, Japan, provides the above-tabulated position and magnitude for 2007-12d from
an unfiltered CCD image taken with a 0.25-m f/5.0 reflector. The above information from
Japanese observers for 2007-12d were communicated by S. Nakano (Sumoto, Japan).
Discovered independently by M. Henze, V. Burwitz, and W. Pietsch, Max-Planck-Institut fuer
Extraterrestrische Physik; A. Updike and D. Hartmann, Clemson University; and P. Milne and
G. Williams, University of Arizona, on two sets of eight 60-sec stacked R-band CCD
exposures obtained with the Super-LOTIS set-up at Kitt Peak (see information for 2007-11a,
above). Additional Super-LOTIS magnitudes for 2007-12d: Dec. 17.19, [18.5:; 18.30, 17.4.
Positional uncertainty given as 0".3. All magnitudes given are obtained from a photometric
solution using R magnitudes of Massey's M31 catalogue (no reference citation provided, but
possibly the same as cited for 2007-08d, above: Massey et al. 2006, AJ 131, 2478).
(2008-01a) Discovered by V. Burwitz, M. Henze, and W. Pietsch, Max-Planck-Institut fuer
Extraterrestrische Physik, Garching; A. Updike and D. Hartmann, Clemson University; and
P. Milne and G. Williams, University of Arizona, on two sets of stacked (twelve 60-sec)
R-band CCD images obtained with the Super-LOTIS set-up at Kitt Peak (see information for
2007-11a, above, for details). Additional approximate Super-LOTIS magnitudes for 2008-01a:
Jan. 19.21 (and earlier), [18.5; 21.21, 17.9. Positional uncertainty stated as 0".3. All
magnitudes given are obtained from a photometric solution using R magnitudes of Massey's
M31 catalogue (no reference citation provided, but possibly the same as cited for 2007-08d,
above: Massey et al. 2006, AJ 131, 2478).
An observation made by Arne Rau and Mansi M. Kasliwal (Astronomy Department,
California Institute of Technology) with the Palomar 60-inch telescope is also tabulated above.
(2008-01b) Discovered by F. Yuan, D. Chamarro, and M. D. Sisson, University of Michigan;
R. Quimby, California Institute of Technology; C. Akerlof, University of Michigan; and
J. C. Wheeler, University of Texas (on behalf of the ROTSE collaboration) on unfiltered CCD
images taken with the ROTSE-IIIb telescope at McDonald Observatory (positional uncertainty
< 1"). ROTSE-III approximate magnitudes: 2007 Aug. 10, [19.2; Oct. 22, [19.6; 2008 Jan.
16.07 UT, [17.8; 19.11, 17.6; 21.08, 17.3; 22.13, 17.4. The object is not well resolved
in the ROTSE-III images, but was clearly revealed by subtracting co-additions of images
taken between 2007 Aug. 10 and Oct. 22. A finding chart of the transient can be
found at website URL http://www.rotse.net/rsvp/j004453.6+415305/index.html
(2008-02a) Discovered by M. Henze, W. Pietsch, and V. Burwitz, Max-Planck-Institut fuer
Extraterrestrische Physik; A. Updike and D. Hartmann, Clemson University; and P. Milne
and G. Williams, University of Arizona, on twelve stacked 60-s R-band CCD images obtained
with the Super-LOTIS set-up at Kitt Peak (see information for 2007-11a, above, for details).
The object is clearly visible on several of the individual 60-s images from Feb. 7;
positional uncertainty 0".3. Additional Super-LOTIS R magnitudes: Feb. 6.17, [19.0:;
8.17, 17.0. All magnitudes given are obtained from a photometric solution using R
magnitudes of the Local Group Survey M31 catalogue (Massey et al. 2006, A.J. 131, 2478).
Discovered independently by Koichi Nishiyama (Kurume, Fukuoka-ken, Japan) and Fujio
Kabashima (Miyaki-cho, Saga-ken, Japan) on seven 30-sec unfiltered CCD frames taken around
Feb. 8.447 UT with a 0.40-m f/9.8 reflector (limiting magnitude 18.9). Additional magnitudes:
Feb. 6.343, [18.8; 7.427, 18.6. Nothing is visible at this position on the Digitized Sky Survey.
R-band magnitudes from Kamil Hornoch, Ondrejov Observatory 0.65-m telescope: 2008
Feb. 8.726 UT, 17.0; 9.758, 16.9.
(2008-02b) Discovered by Koichi Nishiyama (Kurume, Fukuoka-ken, Japan) and Fujio Kabashima
(Miyaki-cho, Saga-ken, Japan) on seven 30-s frames taken around Feb. 13.436 UT using a 0.40-m
f/9.8 reflector (+ unfiltered CCD; limiting magnitude 19.2); nothing visible at this position
on their frame taken on Feb. 10.474 (limiting mag 18.9) or on the Digitized Sky Survey.
Additional magnitudes from Nishiyama and Kabashima: Feb. 12.474, 17.9 (prediscovery;
limiting mag 18.7); 16.43, 17.6 (limiting mag 19.7); 17.44, 17.4 (limiting mag 19.4).
(2008-03a) Discovered by Koichi Nishiyama and Fujio Kabashima (Miyaki-Argenteus, Japan),
who reported directly to Vadim Burwitz, Max-Planck-Institut fuer Extraterrestrische Physik
(MPE) and Observatorio Astronomico de Mallorca, but not to the Central Bureau; Burwitz sent
the CBAT the limited information from Nishiyama and Kabashima, along with a confirmation
report from his own group (which includes also W. Pietsch and M. Henze, MPE; and N. Morales,
Observatorio La Sagra): Five stacked 120-sec unfiltered CCD images obtained with a
0.45-m f/2.8 reflector (+ SBIG STL-11000M CCD camera; 3008 pixels x 2674 pixels, each
pixel being 9 microns x 9 microns) at the Observatorio Astronomico de La Sagra in Spain
on Mar. 2.832 UT; the position for the apparent nova has an estimated uncertainty of 0".3.
All magnitudes given are obtained from a photometric solution using R magnitudes of the
Local Group Survey M31 catalogue (Massey et al. 2006, A.J. 131, 2478). No object is
visible at the position of 2008-03a on images with the same camera on 2008 Feb. 10.78
(limiting magnitude about 18.5).
(2008-03b) Discovered by K. Hornoch (see 2004-03b) on co-added 900-sec and 1170-sec
R-band CCD frames taken with the 0.65-m telescope at Ondrejov. The new object is well
visible on single 90-sec images used for co-added images. R-band magnitudes of 2008-03b
by Hornoch with the same instrument: 2008 Feb. 8.726 UT, [20.0; 12.721, [19.8; Mar.
2.746, 19.4: (prediscovery, marginal detection); 2.754, 19.4: (prediscovery, marginal
detection); 7.756, 17.7; 7.770, 17.8. Nothing visible at this position on numerous
Lelekovice and Ondrejov images back to 2002.
Martin Henze, W. Pietsch, and V. Burwitz, Max-Planck-Institut fuer Extraterrestrische
Physik; A. Updike and D. Hartmann, Clemson University; and P. Milne and G. Williams,
University of Arizona, confirm Hornoch's discovery using three sets of ten 60-s stacked
R-band CCD images obtained with the robotic 60-cm Super-LOTIS telescope at Kitt Peak,
yielding these magnitudes for 2008-03b: Mar. 4.13 UT, 18.2; 7.13, 17.3; 8.13, 17.1.
These magnitudes were obtained from a photometric solution using R magnitudes of the
Local Group Survey M31 catalogue (Massey et al. 2006, A.J. 131, 2478).
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