|
If you would like to receive announcements for supernovae identified by the
CfA SN
group, please contact: Peter Challis pchallis@cfa.harvard.edu
SN 2009
-
SN 2009ds (Ia)
[CBET
1784]
-
Apr 30, 2009 UT, FAST spectrum
with a comparison to type Ia spectrum of sn2009du at -6 days before
maximum brightness.
-
SN 2009do (Ia)
[CBET
1778]
-
Apr 27, 2009 UT, FAST spectrum
with a comparison to type Ia spectrum of sn1996X at 2 days After
maximum brightness.
-
SN 2009bz (II)
[CBET
1748]
-
Mar 30, 2009 UT, FAST spectrum
with a comparison to type IIP spectrum of sn1999em at -1 days before
maximum brightness.
-
SN 2009bv (Ia) in IC 4199
[CBET
1742]
-
Mar 28, 2009 UT, FAST spectrum
with a comparison to type Ia spectrum of sn2003du at -7 days before
maximum brightness. Note: sn1991T @ max is also a good match
-
SN 2009an (Ia) in NGC 4332
[CBET
1707]
-
Feb 28, 2009 UT, FAST spectrum
with a comparison to type Ia spectrum of sn2002bo at -5 days before
maximum brightness.
-
SN 2009al (Ia)
[CBET
1705]
-
Feb 27, 2009 UT, FAST spectrum
with a comparison to type Ia spectrum of sn1992A at -5 days before
maximum brightness.
-
SN 2009P (II) in PGC 34730
[CBET
????]
-
Jan 31, 2009 UT, FAST spectrum
with a comparison to type IIP spectrum of sn2004et at -2 days before
maximum brightness.
-
SN 2009N (II) in NGC 4487 z=0.001
[CBET
????]
-
Jan 25, 2009 UT, FAST spectrum
with a comparison to type IIP spectrum of sn2005cs at +2 days after
maximum.
-
SN 2009B (II) in UGC 4423 z=0.011
[CBET
????]
-
Jan 02, 2009 UT, FAST spectrum
with a comparison to type II spectrum at +5 days after explosion.
-
SN 2009D (Ia) in MCG -03-10-052 z=0.025
[CBET
????]
-
Jan 02, 2009 UT, FAST spectrum
with a comparison to type Ia spectrum at -7 days after explosion.
-
SN 2009C (IIb) in UGC 12433
[CBET
????]
-
Jan 02, 2009 UT, FAST spectrum
with a comparison to type IIb spectrum at 7 days after explosion.
SN 2008
-
SN 2008ip (IIn) in NGC 4846 z=0.015
[CBET
1641]
-
Jan 01, 2009 UT, FAST spectrum
with a comparison to sn1998S (IIn) spectrum at 2 days after explosion.
-
SN 2008io in MCG -02-33-17
[CBET
1640]
-
Dec 30, 2008 UT, FAST spectrum
with a comparison to a Ia spectrum at 50 days after explosion.
-
SN 2008im (Ib??) in PNG 014286 z=0.0083
[CBET
1635]
-
Dec 29, 2008 UT, FAST spectrum
with a comparison to a sn1983V (Ib) spectrum.
Dec 29, 2008 UT, FAST spectrum
with a comparison to a sn1999dn (Ib) spectrum.
-
SN 2008ij (II) in NGC 6643
[CBET
1627]
-
Dec 19, 2008 UT, MMT spectrum shows a
type-II very early after explosion.
-
SN 2008if (II) in MCG -01-24-10
[CBET
1624]
-
Dec 19, 2008 UT, FLWO 1.5m spectrum shows a
type-II very early after explosion.
-
SN 2008ie (IIb) in NGC 1070
[CBET
1623]
-
Dec 19, 2008 UT, FLWO 1.5m spectrum shows a
type-IIb about a week after max.
-
SN 2008hv (Ia) NGC 2765
[CBET
1604]
-
Dec 3, 2008 UT, FLWO 1.5m spectrum shows a
type-Ia about 14 to 9 days before max.
-
SN 2008hs (Ia) NGC 910
[CBET
1599]
-
Dec 1, 2008 UT, FLWO 1.5m spectrum shows a
type-Ia most likely a SN 1991bg type or normal Ia -8 days
-
SN 2008hm (Ia) UGC 12682
[CBET
1594]
-
Nov 30, 2008 UT, FLWO 1.5m spectrum shows a
type-Ia about a week before maximum light.
-
SN 2008hh (Ic) UGC 12682
[CBET
1580]
-
Nov 23, 2008 UT, FLWO 1.5m spectrum shows a
type-Ic about maximum light.
-
SN 2008ha (Ia?) UGC 12682
[CBET
1576]
-
Nov 18, 2008 UT, FLWO 1.5m spectrum shows a
type-Ia similar to the peculiar supernova 2002cx.
The spectrum is
similar to SN 2002cx (Li et al. 2003, PASP 115, 453) at 10 days past maximum
light -- but with a velocity about 3000 km/s lower.
Considering the extremely low absolute magnitude and low ejecta velocity,
which imply a very low total energy release, Foley et al. wonder if 2008ha is
a true supernova that destroyed the progenitor star; if it is, then 2008ha is
possibly the least luminous supernova ever observed.
-
SN 2008gj (Ic) NGC 7321
[CBET
1546]
-
Oct 20, 2008 UT, FLWO 1.5m spectrum shows a
type-Ic supernova at about +12 days after maximum light.
-
SN 2008fy (Ia)
[CBET
1525]
-
Oct 1, 2008 UT, MMT Blue channel shows a
type-Ia supernova at about maximum light
-
SN 2008fx (Ia)
[CBET
1525]
-
Oct 1, 2008 UT, MMT Blue Channel shows a
type-Ia supernova at about 10 days after max.
-
SN 2008fu (Ia)
[CBET
1519]
-
Sept 26, 2008 UT, FLWO 1.5m spectrum shows a
type-Ia supernova at about maximum light. z=0.052
-
SN 2008fk (Ia)
[CBET
1499]
-
Sept 4, 2008 UT, FLWO 1.5m spectrum shows a
type-Ia supernova at about maximum light.
-
SN 2008fi (IIb)
[CBET
1499]
-
Sept 4, 2008 UT, FLWO 1.5m spectrum shows a
type-IIb supernova at about maximum light.
-
SN 2008fj (UGC10759) (Ia)
[CBET
1495]
-
Sept 4, 2008 UT, FLWO 1.5m spectrum shows a
type-Ia supernova at about maximum light.
SNID indicates
that 2008fj is most similar to the subluminous type-Ia supernova 1991bg at
2 days past maximum. UGC 10759 is at a redshift of 0.02714 (Marzke et al.
1996, A.J. 112, 1803).
-
SN 2008el (PGC 70567) (II)
[CBET 1458]
-
August 1, 2008 UT, FLWO 1.5m spectrum shows this
type-II supernova around maximum light, compared with
2004et at a similar age.
-
SN 2008ek (IC 1181) (Ia-91bg)
[CBET 1454]
-
July 30, 2008 UT, MMT 6.5m spectrum shows this
subluminous type-Ia supernova around maximum light, compared with
2007al at a similar age.
-
SN 2008ej (UGC 276) (II)
[CBET 1455]
-
July 30, 2008 UT, MMT 6.5m spectrum shows this
highly-reddened type-II supernova.
Here is the
same spectrum dereddened by 1 mag.
-
SN 2008dx (Anon. galaxy) (Ia)
[CBET 1427]
-
June 12, 2008 UT, FLWO 1.5m spectrum shows this
subluminous type-Ia supernova around one week before maximum light, compared with
2000cn at a 9 days before maximum.
-
SN 2008dt (NGC 6261) (Ia)
[CBET 1424]
-
July 1, 2008 UT, FLWO 1.5m spectrum shows this type-Ia supernova around
one week before maximum light, compared with SN 2005cf at 11 days before maximum.
-
SN 2008do (UGC 8179) (II)
[CBET 1414]
-
June 24, 2008 UT, Magellan Clay 6.5m spectrum shows this
young type-II supernova at two weeks past explosion, compared with
2004et at a similar age.
-
SN 2008dn (UGC 11946) (II)
[CBET 1418]
-
June 28, 2008 UT, FLWO 1.5m spectrum shows this
type-II supernova at one month past explosion, compared with
1999gi at a similar age.
-
SN 2008di (SDSS J121642.18+410223.7) (II)
[CBET 1422]
-
June 27, 2008 UT, FLWO 1.5m spectrum shows this
type-II supernova at 3-4 weeks past explosion, compared with
2004et at a similar age.
-
SN 2008dh (Anon. galaxy) (Ia)
[CBET 1409]
-
June 12, 2008 UT, FLWO 1.5m spectrum shows this
type-Ia supernova around maximum light, compared with
1994D at a one week past maximum.
-
SN 2008cz (AGC 211492) (Ia)
[CBET 1404]
-
June 10, 2008 UT, FLWO 1.5m spectrum shows this
type-Ia supernova around 2-3 weeks past maximum light, compared with
1994D at a similar age.
-
SN 2008cy (MCG -02-39-016) (II)
[CBET 1403]
-
June 9, 2008 UT, FLWO 1.5m spectrum shows this
young type-II supernova at one week past explosion, compared with
1999em at a similar age.
-
SN 2008cw (Anon. galaxy) (IIb)
[CBET 1408]
-
June 6, 2008 UT, MMT 6.5m spectrum shows this
type-IIb supernova around one week past maximum light, compared with
1993J at a similar age. SN 2008cw was originally classified as a
peculiar type-Ib supernova similar to SN 2005bf by Yuan et al. in
CBET 1395
-
SN 2008cu (UGC 11419) (IIn)
[CBET 1396]
-
June 4, 2008 UT, FLWO 1.5m spectrum shows this
type-IIn supernova past maximum light.
-
SN 2008cg (FGC 1965) (IIn)
[CBET 1368]
-
May 8, 2008 UT, FLWO 1.5m spectrum shows this
type-IIn supernova, compared with a spectrum of 1999Z taken on UT 1999
Feb. 9. Filippenko et al. (CBET 1420)
report that 2008cg could be the result of a type-Ia supernova exploding within a dense circumstellar
envelope, such as 2002ic and 2005gj.
-
SN 2008ce (NGC 4428) (II)
[CBET 1364]
-
May 4, 2008 UT, FLWO 1.5m spectrum shows this
type-II supernova several weeks past explosion.
-
SN 2008cd (NGC 5038) (Ia)
[CBET 1362]
-
April 30, 2008 UT, FLWO 1.5m spectrum shows this
reddened type-Ia supernova around maximum light. The spectrum
is heavily contaminated by the underlying host galaxy.
-
SN 2008bx (MCG +07-31-004) (II)
[CBET 1359]
-
April 29, 2008 UT, FLWO 1.5m spectrum shows this
young type-II supernova.
-
SN 2008bt (NGC 3404) (Ia-91bg)
[CBET 1337]
-
April 15, 2008 UT, FLWO 1.5m spectrum shows this
subluminous type-Ia supernova around maximum light, compared with
1991bg at a similar age.
-
SN 2008bl (UGC 9317) (II)
[CBET 1318]
-
March 29, 2008 UT, FLWO 1.5m spectrum shows this
young type-II supernova.
-
SN 2008bg (Anon. galaxy) (Ia)
[CBET 1308]
-
March 15, 2008 UT, FLWO 1.5m spectrum shows this
type-Ia supernova around maximum light, compared with 1994ae
at a similar age.
-
SN 2008az (UGC 10721) (II)
[CBET 1295]
-
March 10, 2008 UT, FLWO 1.5m spectrum shows this
type-IIP supernova around 3-4 weeks past explosion, compared with
1999em at a similar age.
-
SN 2008ax (NGC 4990) (II-pec -> IIb)
[CBET 1285]
-
March 4, 2008 UT, FLWO 1.5m spectrum shows this
young peculiar type-II supernova, compared with 1987A at 2 days past explosion.
Note that 2008X1 has been dereddened by 0.6 mag in this plot.
NEW: He lines have developped in the optical spectrum,
hence a new IIb classification.
-
SN 2008aw (NGC 4939) (II)
[CBET 1282]
-
March 4, 2008 UT, FLWO 1.5m spectrum shows this
young type-II supernova.
-
SN 2008at (UGC 5645) (Ia)
[CBET 1287]
-
March 5, 2008 UT, FLWO 1.5m spectrum shows this
type-Ia supernova around one week past maximum, compared with 2001ep
at a similar age.
-
SN 2008as (ESO 567- G057) (Ia)
[CBET 1276]
-
March 1, 2008 UT, Magellan Clay 6.5m spectrum shows this
type-Ia supernova around one month past maximum light, compared with 1996X
at a similar age.
-
SN 2008aq (MCG -02-33-020) (II/IIb?)
[CBET 1271]
-
February 28, 2008 UT, FLWO 1.5m spectrum shows this
type-II/IIb supernova around one week before maximum, compared with 2006T
at a similar age.
-
SN 2008ao (CGCG 524-054) (Ic)
[CBET 1274]
-
February 29, 2008 UT, FLWO 1.5m spectrum shows this
type-Ic supernova around maximum, compared with 1994I
at a similar age.
-
SN 2008an (UGC 10936) (Ic)
[CBET 1271]
-
February 28, 2008 UT, FLWO 1.5m spectrum shows this
type-Ic supernova around maximum, compared with 1994I
at a similar age.
-
SN 2008af (UGC 9640) (Ia)
[CBET 1253]
-
February 11, 2008 UT, FLWO 1.5m spectrum shows this
type-Ia supernova around one week past maximum, compared with 1992A
at a similar age.
-
SN 2008ae (IC 577) (Ia-pec)
[CBET 1250]
-
February 10, 2008 UT, FLWO 1.5m spectrum shows this
peculiar type-Ia supernova around one week before maximum, compared with 2005hk
at a similar age.
-
SN 2008Z (Anon. galaxy) (Ia)
[CBET 1246]
-
February 9, 2008 UT, FLWO 1.5m spectrum shows this
type-Ia supernova before maximum light, compared with 2003du at 6 days before maximum.
-
SN 2008Y (MCG +9-19-39) (Ia)
[CBET 1246]
-
February 9, 2008 UT, FLWO 1.5m spectrum shows this
type-Ia supernova around maximum light, compared with 2005cf at 5 days past maximum.
-
SN 2008X (NGC 4141) (IIP)
[CBET 1242,
CBET 1300]
-
February 8, 2008 UT, FLWO 1.5m spectrum shows this
type-IIP supernova around 3-4 weeks past explosion.
-
SN 2008U (UGC 8917) (II)
[CBET 1242,
CBET 1300]
-
February 8, 2008 UT, FLWO 1.5m spectrum shows this
possible "supernova impostor" (LBV). It could also be a type-IIn in its early stages
or a low-luminosity type-IIP past the recombination phase (A. Pastorello, priv. comm.)
NEW: Re-analysis of the same data show that 2008U is in fact a type-II during the
hydrogen recombination phase (see CBET 1300).
-
SN 2008G (UGC 2851) (IIP)
[CBET 1209]
-
January 14, 2008 UT, FLWO 1.5m spectrum shows this
type-II supernova around three weeks past explosion, compared with 2004et.
-
SN 2008F (MCG -01-8-15) (IIP)
[CBET 1209]
-
January 14, 2008 UT, FLWO 1.5m spectrum shows this
type-II supernova around one week past explosion, compared with 1999gi.
-
SN 2008D (NGC 2770) (Ic-broad)
[CBET 1204,
CBET 1205]
-
January 11, 2008 UT, MMT 6.5m spectrum shows this
peculiar type-Ic supernova around maximum light, compared with
1990aa and 1998bw.
-
SN 2008B (NGC 5829) (IIn)
[CBET 1201]
-
January 10, 2008 UT, FLWO 1.5m spectrum shows this
type-IIn supernova around maximum light, compared with 2000eo
at a similar age.
-
SN 2008A (NGC 634) (Ia-pec)
[CBET 1198]
-
January 5, 2008 UT, FLWO 1.5m spectrum shows this
peculiar type-Ia supernova around one week before maximum, compared with 2005hk
at a similar age.
Back to top
|
