[vsnet-campaign-sn 172] SN 2001bb and other SNe

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

Dear SN watchers,

  New bright SNe are discovered.  IAUC 7614 reports three SN
discovery, and among them, the brightest one SN 2001bb can become
brighter than mag 16. 

  M. Schwartz, on behalf of LOTOSS colllaboration (Mike and KAIT),
discovered SN 2001bb on Apr 29.3 (mag about 16.5) and confirmed one
day later when SN became mag 0.2 brighter.  The position is R.A. =
13h43m25s.31, Decl. = -29o48'13".1 (2000.0), which is about 16".8 west
and 1".4 south of the nucleus of the tilted spiral (SA(s)bc?) galaxy
IC 4319.  There are several foreground stars on the west side of this
galaxy, so the identification needs care.

  The expected maximum of the typical SN Ia on this galaxy is about
15.6, and it seems that SN 2001bb is in the rising phase.  The
follow-up photometry and type-determining spectroscopy is urged. 

  The other two are also britht.  SN 2001ba in MCG -05-28-1 (SN
location: R.A. = 11h38m01s.76, Decl. = -32o19'51".0 (2000.0), offset
19"E 22"S) is discovered on Apr 27.8 at about mag 16, and is turned
out to be of SN Ia.  It seems to be at the maximum.  SN 2001az in UGC
10483 (SN position: R.A. = 16h34m27s.71, Decl. = +76o01'46".8
(2000.0), offset 5" due west) is discovered on Apr 27.39 at mag 17.1.
The recession velocity of the host galaxy is unknown.  

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

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