[vsnet-alert 4320] SN 2000M in NGC 6398

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

kohji@kusastro.kyoto-u.ac.jp,l49b302@center.wakayama-u.ac.jp,l49b304@center.wakayama-u.ac.jp,yanagi@oao.nao.ac.jp

Dear SN watchers,

  As announced in IAUC 7373, M. Migliardi, the CROSS team, Itary, has
discovered an apparent SN in NGC 6389 on the image taken on Feb.
27.17.  The position measured by the undersigned is: R.A. =
17h32m39s.61, Decl = +16o23'54".9 (2000.0), which is about 2" west and
13" south from the nucleus of tilted Sbc galaxy NGC 6398.  W. Li has
confirmed it on Mar. 1.5 UT and report the position end figures as
39s.67, 54".1.  K. Ayani, using Bisei 1.01-m, and A. Tomita (Wakayama
Univ.) et al., using Okayama 1.88-m, are also did the confirmation
around Mar 1.9 UT. 

It is enbedded the innermost part of the disk, so the extinction by
the host galaxy would somewhat be large.  The reddening by our Galaxy
is not so large (A_V = 0.33 by Schlegel et al. 1998).

Another SN, 1992ab of type II, was occured in this galaxy, which was
observed as R = 17.  It was found during POSS2, so can be seen in DSS2
R images.  It was far from the nucleus of NGC 6389 (80"E, 20"S).  

If SN 2000M is of typical type Ia and without extinction, it can be
rise to 15 mag or so.  It is discovered at 16.5-17.0 mag and now 16.8
mag (W. Li), from which (and from the position) it is probable that
it is of type Ib/c/II.  The spectral confirmation is urged, and
also is photometry followup.

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

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