Electronic Telegram No. 2597
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
CBAT Director:  Daniel W. E. Green; Hoffman Lab 209; Harvard University;
 20 Oxford St.; Cambridge, MA  02138; U.S.A.
e-mail:  cbatiau@eps.harvard.edu (alternate cbat@iau.org)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network


APPARENT NOVA IN M31:  M31N 2010-12c
     Further to CBET 2594, the report by T. Yusa referred to Kabashima and
Nishiyama, whose independent discovery is detailed below; the object has been
given the designation M31N 2010-12c to denote its outburst now, even though it
may possibly refer to a new outburst of the object whose outburst was
designated M31N 2010-01a (cf. CBETs 2124, 2127, 2136, 2187).
     Koichi Nishiyama, Kurume, Japan; and Fujio Kabashima, Miyaki, Japan,
report their independent discovery of M31N 2010-12c at mag 16.4 on six 40-s
unfiltered CCD frames (limiting magnitude 19.2) taken around Dec. 16.526 UT
using a Meade 200R 0.40-m f/9.8 reflector (+ SBIG STL1001E camera).  The
measure the variable's position to be R.A. = 0h42m56s.65, Decl. = +41d17'21".5
(equinox 2000.0), which is 139" east and 73" north of the center of the
galaxy M31.  Nothing is visible at this position on their past frames taken
on Dec. 11.446 (limiting magnitude 19.2) and 14.476 (limiting mag 19.0) or
on the Digitized Sky Survey from 1986 Nov. 27 (limiting red mag 18.9) and
1993 Oct. 21 (limiting infrared mag 17.9).  The note that the nearest star
in the M31 catalogue (http://www.lowell.edu/users/massey/lgsurvey.html) is
only 0".5 away (position end figures 56s.69, 21".8; magnitudes V = 21.7, B =
22.5, R = 21.0).


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2010 CBAT
2010 December 19                 (CBET 2597)              Daniel W. E. Green