[vsnet-campaign-sn 519] classifications of recent SNe

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

Dear SN watchers,

  In addition of two discovery, IAUC 8031 informed the spectroscopic
classifications of two recent SNe by the UCB team.

SN 2002jj:
In [vsnet-campaign-sn 513] (Dec. 5):
>SN2002jj  20020814.5 <190:C  KAI
>SN2002jj  20021001.4 <180:C  KAI
>SN2002jj  20021024.4  165:C  KAI
>SN2002jj  20021103.4  165:C  KAI
>SN2002jj  20021203.4  165:C  KAI
>
># IC 340, a host galaxy of SN 2002jj (3:39:29:55, -13:06:55.8
># (J2000.0), offset = 7"E, 2"S), is a lenticular (S0^0^:) galaxy.
># There is a bright (mag about 14) foreground star about 15" east of
># the nucleus of IC 340.  SN is located between the nucleus and this
># foreground star.  The KAIT discovery image can be seen at:  
># http://astron.berkeley.edu/~bait/2002/sn2002jj.gif .  The expected
># maximum for typical SN Ia is mag about 15.6.  
>#
># Lenticular galaxies are believed to produce SNe Ia only.  On the
># other hand, the reported magnitudes suggest that it does not like SN
># Ia but it can be of type IIP in the plateau phase, though it seems
># somewhat brighter than typical SNe II.  It is urged to determine
># whether it is genuine SN. 

  This SN was turned out to be a type Ic SN, about one month after
maximum on Dec. 12.  Such a slow evolution of the light curve is quite
exceptional for type Ic SN.  The follow-up magnitude estimates is very
urged.

SN 2002jm:
In [vsnet-campaign-sn 517] (Dec. 11):
>SN2002jm  20021123.5 <185:C  KAI
>SN2002jm  20021207.5  175:C  KAI
>SN2002jm  20021209.5  175:C  SCH
>
># IC 603, a host galaxy of SN 2002jm (10:19:25.20, -5:39:14.5
># (J2000.0), offset = 3"E, 7"N), is a disk ((R)SB(r)A:) galaxy.  The
># SN is superimposed on the bright bulge region.  The expected maximum
># for typical unreddened SN Ia is mag about 16.1, which seems not the
># case. 

  It seems to be a subluminous SN Ia about 3 weeks after maximum.  

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

VSNET Home Page

Return to Daisaku Nogami

---

vsnet-adm@kusastro.kyoto-u.ac.jp