Electronic Telegram No. 2846
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 2011gl IN PGC 16578 = PSN J05014307-1523247
     S. Howerton, Arkansas City, KS, U.S.A.; R. H. McNaught and G. Garradd,
Australian National University; A. J. Drake, S. G. Djorgovski, A. Mahabal, M.
J. Graham, and R. Williams, California Institute of Technology; 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 public unfiltered-CCD images from the Siding Spring
Survey (SSS):

 SN       2011 UT       R.A. (2000.0) Decl.      Mag.      Offset
 2011gl   Sep. 23.71   5 01 43.07  -15 23 24.7   18.2    42".9 E, 29".7 N

The variable was designated PSN J05014307-1523247 when it was posted on the
Central Bureau's TOCP webpage and is here designated SN 2011gl based on the
spectroscopic confirmation reported below.  Additional unfiltered CCD
magnitudes for 2011gl:  Mar. 26.45 UT, [19.3 (SSS); Sept. 25.483, 17.7 (J.
Brimacombe, Cairns, Australia; position end figures 43s.07, 25".3; image
posted at website URL http://www.flickr.com/photos/43846774@N02/6183792395/.

     G. H. Marion, Harvard-Smithsonian Center for Astrophysics (CfA), on behalf
of the CfA Supernova Group, reports that a spectrum (range 340-740 nm) of PSN
J05014307-1523247 = 2011gl was obtained on Sept. 29 UT by Marion with the F. L.
Whipple Observatory 1.5-m telescope (+ FAST).  Cross-correlation with a library
of supernova spectra using the "Supernova Identification" code (SNID; Blondin
and Tonry 2007, Ap.J. 666, 1024) shows that 2011gl is a type-Ia supernova about
two weeks after maximum light.  The best-fit SNID template is to SN 2005am at
+16 days and z = 0.043.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2011 CBAT
2011 October 1                   (CBET 2846)              Daniel W. E. Green