[IAUC] CBET 2483: 20101007 : APPARENT NOVA IN M31: M31N 2010-10a

Mie Sep 14 16:19:42 ART 2011

                                                  Electronic Telegram No. 2483
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 2010-10a
     Koichi Nishiyama, Kurume, Japan; and Fujio Kabashima, Miyaki, Japan,
report the discovery of a possible nova (mag 17.9) in M31 on seven 40-s
unfiltered CCD frames (limiting magnitude 19.6) taken around Oct. 05.551 UT
using a Meade 200R 0.40-m f/9.8 reflector (+ SBIG STL1001E camera).  They
confirmed the variable on images (limiting mag 19.7) taken on Oct. 6.538,
when the new object had brightened to mag 17.1.  The apparent nova, designated
M31N 2010-10a, is located at R.A. = 0h42m45.82, Decl. = +41d24'22".0
(equinox 2000.0), which is 17" east and 493" north of the center of the galaxy
M31.  Nothing is visible at this position on their past frames taken on Sept.
30.560 and Oct. 1.542 (limiting magnitude 19.2) or on the Digitized Sky Survey
from 1986 Nov. 27 (limiting red mag 18.7) and 1993 Oct. 21 (limiting infrared
mag 17.9).  T. Yusa, Osaki, Japan, reports that M31N 2010-10a was at mag 17.3
on unfiltered CCD frames (limiting mag 19.3) taken on Oct. 6.188, remotely
using a 0.25-m f/3.4 reflector (+ SBIG ST-10XME camera) at the RAS Observatory
near Mayhill, NM, U.S.A.; he measured position end figures 45s.82, 22".3
(offset 16" east, 497" north).  Yusa's image is posted at the following
website URL:  http://space.geocities.jp/yusastar77/PNinM31_101006.htm.


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                         (C) Copyright 2010 CBAT
2010 October 7                   (CBET 2483)              Daniel W. E. Green