Return to Home Page
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 yamaoka@rc.kyushu-u.ac.jp
Return to the Daisaku
vsnet-adm@kusastro.kyoto-u.ac.jp
