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[vsnet-campaign-sn 712] SNe classifications

Dear SN watchers,

  The CfA team made the classifications of three recent SNe.  The
spectra can be seen at:
http://cfa-www.harvard.edu/cfa/oir/Research/supernova/RecentSN.html . 

SN 2003ir:
In [vsnet-campaign-sn 706] (Oct. 14):
>SN2003ir  20030408.2 <190:C  KAI
>SN2003ir  20031011.5  180:C  KAI
>SN2003ir  20031012.5  180:C  KAI
># SN 2003ir (7:11:08.18, +25:54:55.0 (J2000.0), offset = 15"E, 1"S) is
># hosted by UGC 3726, a spiral (S?) galaxy at a low Galactic latitude
># (b = 15o).  There are many foreground stars around this galaxy; a
># mag 12 star is located about 25" NE of the nucleus of UGC 3726.  The
># expected maximum for typical SN Ia is mag about 16.9. 

  It is a normal type II SN.

SN 2003iu:
In [vsnet-campaign-sn 710] (Oct. 19):
>SN2003iu  20030901.0  <190:C  ARM
>SN2003iu  20030923.0  <195:C  ARM
>SN2003iu  20031016.07  164:C  ARM
>SN2003iu  20031017.106 164:C  ARM
># SN 2003iu (1:55:24.55, +21:17:06.4 (J2000.0), offset = 2"W, 4"S) is
># hosted by UGC 1393, a lenticular (S0-:) galaxy.  With regard to the
># recession velocity of the host galaxy (12320 km/s by the NED), the
># discovery magnitude is quite bright even as a SN Ia.  Further
># photometry and the spectral classification is urged.

  It is a type Ia SN near maximum on Oct. 20.38 UT.  The shallowness
of Si II 635nm line may indicate that it would be a luminous SN Ia.

SN 2003iw:
In [vsnet-campaign-sn 710] (Oct. 19):
>SN2003iw  20030915.0  <195:C  Bol
>SN2003iw  20030923.0  <195:C  Bol
>SN2003iw  20031007.0  <195:C  Bol
>SN2003iw  20031017.95  176:C  Bol
>SN2003iw  20031018.304 176:C  Bol
>SN2003iw  20031018.873 171:C  ARM
># SN 2003iw (21:39:43.03, +6:17:03.0 (J2000.0), offset = 22"W, 8"S) is
># hosted by NGC 7102, a barred-spiral (SB(rs)b?) galaxy.  There are
># many foreground stars superimposed on NGC 7102, so the
># identification needs care.  The expected maximum for typical SN Ia
># is mag about 15.9.

  It has a blue and almost featureless continuum with a week feature
around 650 nm (Oct. 20.14 UT).  It is possibly a type II SN caught at
the very early phase.

Sincerely Yours,
Hitoshi Yamaoka, Kyushu Univ., Japan

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