[vsnet-campaign-sn 320] type of recent SNe

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

Dear SN watchers,

  The CfA team took spectrum of recent SNe, which can be seen at:
http://cfa-www.harvard.edu/cfa/oir/Research/supernova/RecentSN.html. 

  From this page, the recently determined types of SNe other than
2002C and 2002E (vsnet-campaign-sn 319) are summarized.

SN 2002D: 
I wrote in [vsnet-campaign-sn 315]:
>#   name     host name  (type) exp.Iamax Note
>#  SN 2002D  NGC  594    Sbc:   16.0

It was turned out to be of type II.  The discovery magnitude (mag
about 16.8) is somewhat brighter than the typical SN II.

SN 2002F:
I wrote (ibid):
>#   name     host name  (type) exp.Iamax Note
>#  SN 2002F  UGC 2885  SA(rs)c  16.7   bright foreground stars

It is also of type II, possibly in the earlier phase than SN 2002D. 

SN 2002G: 
I wrote (ibid):
>#   name     host name  (type) exp.Iamax Note
>#  SN 2002G CGCG 189-024  E     17.3   

It is of type Ia before maximum, as expected from the morphology of
the host galaxy.  The spectrum shows a notable absorption around 580
nm (Si II), which is typical for the intrinsically dim SN Ia.  On the
other hand, the discovery magnitude is near to the expected maximum
for typical SN Ia.  It may means that the distance of the host reduced
from its recession velocity is overestimated.

SN 2002H:
I wrote in [vsnet-campaign-sn 317]:
># The host galaxy of SN 2002H = MCG -02-35-11 is a lenticular (S0 pec)
># galaxy.  The expected maximum for typical SN Ia is mag about 16.6.

It is also of type Ia, but past maximum.  

SN 2002I:
I wrote (ibid):
># The host galaxy of SN 2002I = IC 4229 (barred-spiral = (R')SB(r)b
># pec:) also produced SN II 2001ae (mag 17.3 at discovery = 2001 Mar.
># 15.5, IAUC 7597, 7599).  The expected maximum for typical SN Ia is
># mag about 16.6. 

It is also of type Ia past maximum, and on the later phase than SN
2002H. 

Then, every SN discovered this year is spectroscopically classified,
except the dim SN 2002B behind the LMC and the most recent SN 2002J.

Thanks to D. Bishop for pointing me to this page!

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

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