[IAUC] CBET 2448: 20100906 : APPARENT NOVA IN M31: M31N 2010-09a

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                                                  Electronic Telegram No. 2448
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 en eps.harvard.edu (alternate cbat en iau.org)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network


APPARENT NOVA IN M31:  M31N 2010-09a
     Syuichi Nakano, Sumoto, Japan, reports the discovery by Koichi Itagaki
(Teppo-cho, Yamagata) of an apparent nova (mag 17.2) in M31 on unfiltered CCD
frames (limiting magnitude 20.5) taken on Sept. 4.552 UT using a 0.60-m f/5.7
reflector (+ Bitran BT-214E camera).  The new object is located at R.A. =
0h42m23s.32 +/- 0s.03, Decl. = +42o17'08".6 +/- 0".3 (equinox 2000.0).
Additional magnitudes for M31N 2010-09a measured by Itagaki:  1986 Nov. 27,
[21.0 (Digitized Sky Survey red plate); 2007 Oct. 13, 20.0; 2010 Aug. 21.631,
[19.0; Sept. 1.666, 17.8 (pre-discovery); 5.490, 18.1 (limiting mag 20.5).
The discovery image is visible at http://www.k-itagaki.jp/images/pn-m-31.jpg.
Nakano also forwards a confirming report by T. Yusa (Osaki) on Sept. 5.500,
in which an unfiltered CCD image taken with a 0.30-m f/9.9 Cassegrain telescope
(+ BSTL-1001E camera) shows M31N 2010-09a at mag 17.5 and with position end
figures 23s.29, 08".9.


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                         (C) Copyright 2010 CBAT
2010 September 6                 (CBET 2448)              Daniel W. E. Green