SN2003U 20020910.0 <190C Bol SN2003U 20030127.153 180C Bol SN2003U 20030128.069 180C Bol # A host galaxy of SN 2003U (17:22:45.66, +62:09:50.4 (J2000.0), # offset = 13"E, 7"S) is a face-on barred-spiral (SBcd) galaxy NGC # 6365A, which is making a probably interacting pair NGC 6365 = Arp 30 # with a northern egde-on Sdm galaxy NGC 6365B. The expected maximum # for typical SN Ia is mag about 17.0. SN 2003M: In [vsnet-campaign-sn 544] (Jan. 26): >># The position of the new object is 12:13:21.00, +21:38:48.4 >># (J2000.0), which is about 38" east and 44" north of the nucleus of >># an elliptical (E) galaxy UGC 7224. Several small galaxies are seen >># around this galaxy. The expected maximum for typical SN Ia is mag >># about 16.7. > > The Asiago team reported that the spectrum of SN 2003M taken on Jan. >25.00 UT shows a strong resemblance with SN Ic 1994I. The SN is >physically associated with UGC 7224, though it is very far (about >30kpc) from its nucleus. SN Ic is thought to be a core-collapse one, >and such core-collapse SN in an early-type galaxy is very exceptional. The CfA team took a spectrum of SN 2003M on Jan. 26.38. They report that it is an unusual type-Ia SN, resembling a dim SN Ia 1991bg 3 weeks after maximum light. Their spectrum can be seen at: http://cfa-www.harvard.edu/cfa/oir/Research/supernova/spectra/sn2003m-20030126.flm.gif It resembles the spectra of SNe 1999gh and 2001P available in the same site. SN 2002gz: In [vsnet-campaign-sn 502] (Nov. 11, 2002): > IAUC 8014 informed the spectra of recent two SNe by the UCB team: >both spectra were taken on Nov. 9 UT with Keck II 10-m. > >># SN 2002gz (2:34:10.36, -0:53:18.2, J2000.0) is located at about 4" >># east and 1" south of an apparent host dim galaxy. > > It is indeed a SN with a blue continuum and very broad undulations, >but the classification is uncertain. It can be of type IIb because of >possible H-alpha emission and He I absorption. The recession velocity >is measured as about 25000 km/s. The Las Campanas Observatory spectra of this object taken between 2002 Oct. 29 and 2003 Jan. 10 suggest that it has evolved into normal type Ic supernova, though it shows some difference in the earlier dates. It did not show evidence for strong He I lines, so type IIb classification is unlikely. The reporters (M. Hamuy, M. Phillips and J. Maza) proposed that, if the undulation near H-alpha is indeed due to the hydrogen, this object should be called as "type IIc".