[vsnet-campaign-sn 377] spectral types of recent SNe

[Hitoshi YAMAOKA <yamaoka@rc.kyushu-u.ac.jp>]

Dear SN watchers,

  IAUC 7851 informed the spectral types of several recent SNe.

SN 2002bn:

In [vsnet-obs 38871]:
># UGC 6527, the referred host of SN 2002bn, is a name for the compact
># group of galaxies constructed by three members.  This group is a
># part of Arp 322 = HCG (Hickson) 56, which include 5 or more
># galaxies.  The apparent host is UGC 6527 NED03 = HCG 56B, a edge-on
># SB0 galaxy.  The expected maximum for typical SN Ia is mag about
># 16.8, which is not too far from the observed value. 

  This SN turned out to be a type Ia, four weeks after maximum on Mar.
9.28 (CfA group).   

SN 2002bo:

In [vsnet-campaign-sn 376]:
>  Other than Gunma observation, the Asiago group and the CfA group
>reported the spectrum with the same conclusion.  The CfA group notes
>about the narrow Na I D absorption (EW = 0.3 nm) at the velocity of
>the host galaxy, which indicates the large reddening.  They also quote
>about the Ti absorption features, which suggest that it may be a
>subluminous SN Ia.  The followup photometry is quite encouraged,
>because it would greatly help the research for the SNe Ia of
>subluminous class.  

  The UCB group also observed this SN, but report a lack of Ti
features.  They comments on the strong Si II 585 nm feature, which is
also typical for subluminous SN Ia.

Sincerely Yours,
Hitoshi Yamaoka, Kyushu Univ., Japan
yamaoka@rc.kyushu-u.ac.jp

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