[IAUC] CBET 2834: 20110929 : SUPERNOVA 2011gb = PSN J01334294+3448371

[quai en eps.harvard.edu]

                                                  Electronic Telegram No. 2834
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


SUPERNOVA 2011gb = PSN J01334294+3448371
     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 unfiltered Catalina Sky Survey (CSS) images:

 SN       2011 UT       R.A. (2000.0) Decl.      Mag.      Offset
 2011gb   Sep. 24.30    1 33 42.94  +34 48 37.1   16.1    4".5 W, 1".1 S

The new object was designated PSN J01334294+3448371 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2011gb based on the
spectroscopic report below.  Additional CCD magnitudes for 2011gb (unfiltered
unless noted otherwise):  Jan. 16.23, [18.5 (CSS); Sept. 24.850, 15.9 (D.
Denisenko, Moscow, Russia; 0.20-m f/5 reflector + Meade DSI Pro II camera;
position end figures 42s.84, 36".8; image posted at the following website URL:
http://pics.livejournal.com/bigdenru/pic/000a957p/); 24.897, 15.5 (Paolo
Corelli, Pagnacco, Italy; 0.45-m f/4.5 telescope; position end figures 42s.8,
36".8; nearby galaxy centered at position end figures 43s.35, 37".9); 25.187,
16.3 (J. Brimacombe, Cairns, Australia; position end figures 42s.86, 37".0;
image posted at URL http://www.flickr.com/photos/43846774@N02/6186780582/);
26.875, 16.3 (Nick James, Chelmsford, Essex, England; Celestron 11 telescope
+ ST9XE camera; position end figures 42s.84, 36".9; UCAC-3 reference stars).

     S. Valenti, S. Benetti, L. Tomasella, and P. Ochner, Osservatorio
Astronomico di Padova, Istituto Nazionale di Astrofisica; and A. Pastorello,
Dipartimento di Astronomia, Universita di Padova, on behalf of a larger
collaboration, report that a spectrogram of PSN J01334294+3448371 = SN
2011gb, obtained on Sept. 25.06 UT, suggests that it is a type-Ia supernova
observed a few weeks after B-band maximum at a redshift z = 0.014.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2011 CBAT
2011 September 29                (CBET 2834)              Daniel W. E. Green