[IAUC] CBET 1636: 20081229 : SUPERNOVA 2008in IN M61

[IAUC mailing list]

                                                  Electronic Telegram No. 1636
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS en CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT en CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html


SUPERNOVA 2008in IN M61
     S. Nakano, Sumoto, Japan, reports the discovery by Koichi Itagaki
(Teppo-cho, Yamagata, Japan) of an apparent supernova (mag 14.9) on unfiltered
CCD frames (limiting mag 18.0) obtained on Dec. 26.79 and 27.695 UT using a
0.30-m f/8 reflector at his Takanezawa station (Tochigi-ken).  The new
object is located at R.A. = 12h22m01s.77 +/- 0s.01, Decl. = +4o28'47".5 +/-
0".4 (equinox 2000.0), which is 102" east and 22" north of the center of M61
(= NGC 4303).  Nothing is visible at this location on his past frame taken on
2000 Mar. 27 (limiting magnitude 19.0).  Nakano adds that K. Kadota (Ageo,
Japan, 0.25-m f/5 reflector) found mag 15.1 and position end figures 01s.77,
48".3 for 2008in from an unfiltered CCD image taken on Dec. 27.680 (limiting
mag 17.7).  Following posting on the Central Bureau's unconfirmed-objects
webpage, W. Wells (Oklahoma City, remotely using a 30.5-cm Dall-Kirkham
Cassegrain telescope near Mayhill, NM, U.S.A.) reports the following
magnitudes for 2008in on Dec. 28.458:  V = 14.3, R = 13.2.  SN 2006ov also
appeared in this galaxy (cf. CBET 756, 757; also discovered by Itagaki).


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2008 CBAT
2008 December 29                 (CBET 1636)              Daniel W. E. Green