Electronic Telegram No. 3015
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 2012aa = PSN J14523348-0331540
     Further to CBET 2929, S. B. Cenko, W. Li, and A. V. Filippenko report the
LOSS discovery of an apparent supernova on unfiltered KAIT images:

 SN       2012 UT        R.A. (2000.0) Decl.      Mag.      Offset
 2012aa   Jan. 29.56   14 52 33.48  - 3 31 54.0   17.7    0".1 E, 1".6 S

The variable was designated PSN J14523348-0331540 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2012aa based on the
spectroscopic confirmation reported below.  Additional CCD magnitudes for
2012aa:  2011 May 12.40 UT, [19.1 (KAIT); 2012 Jan. 31.51, 17.9 (KAIT); Feb.
1.445, 17.7 (Joseph Brimacombe, Cairns, Australia; remotely using a 51-cm RCOS
telescope + STL11K camera + luminance filter at the New Mexico Skies
Observatory near Mayhill, NM, U.S.A.; magnitude includes host-galaxy light;
position end figures 33s.56, 54".6; image posted at the following website URL:
http://www.flickr.com/photos/43846774@N02/6803721927/).

     J. M. Silverman, K. I. Clubb, P. Blanchard, and A. V. Filippenko,
University of California, Berkeley, report that inspection of a low-signal-
to-noise-ratio CCD spectrum (range 340-1000 nm), obtained on Feb. 2 UT with
the 3-m Shane reflector (+ Kast) at Lick Observatory, shows that PSN
J14523348-0331540 = SN 2012aa is a supernova, probably of type Ic.  The
redshift of the host galaxy is found to be about 23900 km/s from narrow
emission features.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2012 CBAT
2012 February 9                  (CBET 3015)              Daniel W. E. Green