Electronic Telegram No. 2301
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
CBAT Director:  Daniel W. E. Green; Room 209; Dept. of Earth and Planetary
 Sciences; Harvard University; 20 Oxford St.; Cambridge, MA  02138; U.S.A.
e-mail:  cbat@iau.org; cbatiau@eps.harvard.edu
URL http://www.cfa.harvard.edu/iau/cbat.html


SUPERNOVA 2010do IN NGC 5374
     L. A. G. Monard, Pretoria, South Africa, reports his discovery of
an apparent supernova (mag 17.2) on several unfiltered CCD images taken
on June 1.787 UT at his Bronberg Observatory.  The new object, which was
confirmed at mag 17.1 by Monard on June 2.756, is located at R.A. =
13h57m28s.11, Decl. = +6d05'48".5, which is 23" west and 2" south of the
galaxy core of NGC 5374.  Nothing is seen at this position on Monard's
previous image of this galaxy taken on Apr. 15.842 (limiting mag 18.8) or
on the Digitized Sky Survey (limiting red mag 20.5).
     After posting on the Central Bureau's unconfirmed-objects webpage,
A. Narla, S. B. Cenko, W. Li, and A. V. Filippenko, University of California,
report the independent LOSS discovery of 2010do on unfiltered KAIT images
(cf. CBET 2285):

 SN       2010 UT       R.A. (2000.0) Decl.      Mag.    Offset
 2010do   June 2.25   13 57 28.06  + 6 05 48.3   17.6    24".4 W

Nothing was visible at this position on a KAIT image from May 8.34
(limiting mag 19.3).
     The type-II supernova 2003bl also appeared in NGC 5374 (cf. IAUC 8086).


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2010 CBAT
2010 June 2                      (CBET 2301)              Daniel W. E. Green