[vsnet-alert 3622] SN 1999el in NGC 6951

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

cf: [vsnet-chart 213] Chart of SN1999el
http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/Mail/vsnet-chart/msg00213.html
cf: [vsnet-chat 2369] Host galaxy of SN1999el
http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/Mail/vsnet-chat/msg02369.html

Dear SN watchers, 

  The Beijing (BAO) team has discovered very nearby supernova.  The
reported magnitudes shows that it is in very early stage and still
rising, and from its type (IIn) the bright (13 mag or so) maximum is
expectable.   

  SN 1999el was discovered on Oct. 20.45 UT.  The location is: R.A. =
20h37m17s.83, Decl. = +66o06'11".5 (2000.0), estimated by the BAO
group. The estimated offsets by KAIT team was 21".7 east and 8".6
south of the nucleus of NGC 6951, which is quite close to that by the
BAO group (21".8 east and 8".4 south).  KAIT team noted that there are
two bearby foreground stars; whose offsets from the nucleus are
23".9E, 8.4"S (brighter one, mag about 17.3) and 19".4E, 8".8S (dimmer
one, mag about 18.6).  The new object exist between these two.  
The reported magnitudes are around 15.0 mag on Oct. 20 -- 22.

  The host galaxy NGC 6951 is type SABbc, and SN 1999el is overposed
the innermost part of the disk.  There are many sorrounding foreground
stars.  The recession velocity of this galaxy (about 1300 km/s) shows
that it is on about the Virgo distance.  

  The spectrum of SN 1999el reveals that it is of type IIn SN in very
early stage.  The maximum luminosities of SNeIIn is very spread:
someone (e.g. SN 1998ee, 1999E) is as bright as SNeIa (M_max = -19 --
-20), and other (e.g. SN 1999bw; see vsnet-alert 2885) is quite dim
(M_max > -14).   If SN 1999el is among the formers, it will reach 13
mag or such.  The followup photometry and specrtoscopy is extremely
encouraged for resolving the nature of these curious supernovae.

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

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