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Dear SN watchers, IAUC 8078 informed the classifications of recent SNe by the CfA team. SN 2003ao: In [vsnet-campaign-sn 559] (Feb. 12): >SN2003ao 20021202.4 <190:C KAI >SN2003ao 20030130.4 173:C KAI >SN2003ao 20030210.4 173:C KAI > ># SN 2003ao (9:45:48.46, -14:22:14.0 (J2000.0), offset = 2"E, 8"S) is ># hosted by NGC 2993, a disturbed spiral (Sa pec) galaxy making an ># interacting pair Arp 245 with NGC 2992. The SN is superimposed on ># the central bulge region. The expected maximum for typical SN Ia is ># mag about 14.4, but the reported magnitudes suggest it is probably a ># core-collapse event in its plateau phase. It is really a type II SN, whose spectrum taken on Feb. 22.30 is consistent with the plateau phase of normal SN II. SN 2003ar: In [vsnet-campaign-sn 561] (Feb. 15): >SN2003ar 20030123.0 <195C Bol >SN2003ar 20030206.162 179C Bol >SN2003ar 20030214.142 168C Bol > ># SN 2003ar (16:02:08.11, +70:24:55.5 (J2000.0), offset = 5"E, 6"S) is ># hosted by MCG +12-15-47, which is probably identified with poorly ># coordinated NGC 6071, an early-type (E or S0) galaxy. The expected ># maximum for typical SN Ia is mag about 16.7. A spectrum taken on Feb. 22.50 shows that it is SN Ia two or three weeks after maximum. SN 2003as: In [vsnet-campaign-sn 561] (Feb. 15): SN2003as 20030126.0 <190C Bol >SN2003as 20030213.909 168C Bol >SN2003as 20030124.765 168C Bol > ># SN 2003as (5:28:45.81, +49:52:59.1 (J2000.0), offset = 10"E, 2"S) is ># hosted by MCG +08-10-7, a spiral galaxy near the Galactic plane (b = ># 8o.4). The expected maximum for typical SN Ia is mag about 17.6 in ># R (the Galactic extinction is introduced according to Schlegel et al. ># (1998)), but unfiltered CCD observation would make a brighter ># magnitude because of the infrared leak. It is turned out to be a type-IIn SN. It seemd to belong the luminous class, or "type IIn hypernova". Followup photometries are very urged. SN 2003at: In [vsnet-campaign-sn 563] (Feb. 17): >SN2003at 20030215.150 172C ARM >SN2003at 20030217.062 172C ARM > ># SN 2003at (16:38:47.81, +66:01:23.7 (J2000.0), offset = 3"E, 13"N) ># is hosted by MCG +11-20-23, a dim spiral? galaxy. It seems to be ># a foreground galaxy of the cluster Abell 2218. There is a dim (mag ># about 18) foreground star about 21" due south of the nucleus of MCG ># +11-20-23. It is a somewhat young type-II SN on Feb. 22.52. Sincerely Yours, Hitoshi Yamaoka, Kyushu Univ., Japan yamaoka@rc.kyushu-u.ac.jp
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