Electronic Telegram No. 2438
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


SUPERNOVA 2010hj IN PGC 67413
     A. J. Drake, S. G. Djorgovski, A. Mahabal, M. J. Graham, and R. Williams,
California Institute of Technology; R. H. McNaught and G. Garradd, Australian
National University; S. Howerton, Arkansas City, KS, U.S.A., J. L. Prieto,
Carnegie Observatories; M. Catelan, Pontificia Universidad Catolica de Chile;
E. C. Beshore and S. M. Larson, Lunar and Planetary Laboratory, University of
Arizona; and E. Christensen, Gemini Observatory, report the discovery of an
apparent supernova in unfiltered Siding Spring Survey (SSS) images:

 SN       2010 UT       R.A. (2000.0) Decl.      Mag.      Offset
 2010hj   Aug. 4.61   21 49 09.84  -59 02 23.2   17.1    5".5 W, 8".2 S

Nothing was visible at this position on an SSS image from 2009 Oct. 1.50 UT
(limitiing mag 18.9), but 2010hj was detected again in SSS images on Aug.
29.59 (no magnitude provided).  The host galaxy appears to be PGC 67413 = ESO
145-G16.  Joseph Brimacombe, Cairns, Australia, reports that ten stacked 600-s
CCD images (limiting magnitude 20) taken remotely with a 32-cm RCOS telescope
(+ STL6K camera + clear filter) at the Macedon Ranges Observatory near
Melbourne, Australia, on Aug. 29.727 show the new object to be at mag 18.3
and located approximately 7" west and 7" south of the presumed host-galaxy
nucleus.  Another stacked image (seven 1200-s frames; limiting magnitude 20),
taken by Brimacombe on Sept. 2.636 with a 40-cm RCOS telescope (+ U16 camera
+ red filter) at the Coral Towers Observatory (Cairns), yields mag 18.6 for
2010hj; the Sept. 2 stacked image has been posted at the following website
URL:  http://www.flickr.com/photos/43846774@N02/4952444311/.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2010 CBAT
2010 September 3                 (CBET 2438)              Daniel W. E. Green