List of supernovae discovered in 2008 identified by the CfA SN Group [SNe in previous years (2007, 2006,etc) ]

All supernovae are indentified using the Supernova Identification (SNID) code of Blondin & Tonry (2007) [ADS,astro-ph].

If you would like to receive announcements for supernovae identified by the CfA SN group, please contact: Peter Challis pchallis@cfa.harvard.edu

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SN 2009

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SN 2009lh(Ia)

Nov 23 2009 UT, MMT Blue Channel spectrum with a comparison to type Ia spectrum of sn1989B at 13 days past maximum brightness.

SN 2009lm(IIP)

Nov 23 2009 UT, MMT Blue Channel spectrum with a comparison to type IIP spectrum of sn2004dj at maximum brightness.

SN 2009lo(IIP)

Nov 23 2009 UT, MMT Blue Channel spectrum with a comparison to type IIP spectrum of sn2005cs at 2 days after maximum brightness.

SN 2009ln(IIP)

Nov 23 2009 UT, MMT Blue Channel spectrum with a comparison to type IIP spectrum of sn2003et at +12 days after maximum brightness.

SN 2009lk(IIp)

Nov 23 2009 UT, MMT Blue Channel spectrum with a comparison to type IIP spectrum of sn2003et at +25 days after maximum brightness.

SN 2009lg(Ia)

Nov 23 2009 UT, MMT Blue Channel spectrum with a comparison to type Ia spectrum of sn2003du at +10 days after maximum brightness.

SN 2009le(Ia)

Nov 15 2009 UT, FAST Spectrum with a comparison to type Ia spectrum of sn2003du at -10 days before maximum brightness.

SN 2009lf(Ia)

Nov 15 2009 UT, FAST spectrum with a comparison to type Ia spectrum of sn2005bo at -8 days before maximum brightness.

SN 2009lb(IIP)

Nov 11 2009 UT, FAST spectrum with a comparison to type IIP spectrum of sn2006bp at +3 days after maximum brightness.

SN 2009iz(Ib)

Sept 20 2009 UT, MMT Blue Channel spectrum with a comparison to type Ib-pec spectrum of sn2005bf at -8 days before maximum brightness.

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.

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SN 2008

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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.

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