Electronic Telegram No. 2144
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html


SUPERNOVA 2010O IN NGC 3690
     P. Challis reports that a spectrum obtained last night of the purported
supernova found in IC 356 (as reported by Dimai on CBET 2143) is in fact the
spectrum of a foreground star, not a supernova.  Thus, the designation 2010O
is being re-assigned to the new object described below.
     J. Newton and T. Puckett report the discovery of an apparent supernova
(mag 15.6) on an unfiltered CCD frame (limiting mag 18.5) taken with a 0.40-m
telescope in Portal, AZ, on Jan. 24.37 UT in the course of the Puckett
Observatory Supernova Search; the new object was confirmed on frames taken
on Jan. 25.34 by T. Orff (limiting mag 19.5).  SN 2010O is located at R.A. =
11h28m33s.86, Decl. = +58o33'51".6 (equinox 2000.0), which is 3".7 east and
5".7 north of the center of its apparent host galaxy, NGC 3690.  Nothing is
visible at this position on images taken by Puckett on 2009 Apr. 4 (limiting
mag 19.4).  The offsets of 2010O are relative to the eastern component of the
interacting galaxy pair.  Note that NGC 3690 is interacting with the galaxy
IC 694.  The discovery image has been posted at the following website URL:
http://www.possdata.com/tp001.jpg.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2010 CBAT
2010 January 25                  (CBET 2144)              Daniel W. E. Green