Electronic Telegram No. 3017
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 2011kc = TCP J10355100+4109594
     A. J. Drake, S. G. Djorgovski, M. J. Graham, A. Mahabal, and R. Williams,
California Institute of Technology; J. L. Prieto, Princeton University; 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
 2011kc   Dec. 28.40   10 35 51.00  +41 09 59.4   17.6     1" north

The variable was designated TCP J10355100+4109594 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2011kc based on the
spectroscopic confirmation reported below.
     Spectroscopic confirmation was obtained with the Palomar 5-m reflector (+
DSBS) on 2012 Jan. 16 UT; a spectrogram (range 400-800 nm) was compared with a
library of spectra using the "Supernova Identification" code (SNID; Blondin
and Tonry 2007, Ap.J. 666, 1024), showing that TCP J10355100+4109594 = 2011kc
best matches the type-Ia supernova 2003du at two weeks past maximum.
     Further CCD magnitudes for 2011kc (unfiltered unless noted otherwise):
2011 June 9.19 UT, [20.9 (CSS); Jan. 31.262, 18.0 (R. A. Koff, Bennett, CO,
USA; Meade 0.25-m f/10 reflector + Apogee AP-47p camera; limiting mag 20.0;
position end figures 50s.94, 59".9; UCAC3 reference stars); 31.493, 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.; position end figures 51s.01, 10'00".0; image posted at
website URL http://www.flickr.com/photos/43846774@N02/6612017583/); 2012
Jan. 23.32, 18.4 (CSS); Feb. 1.43, 18.8 (CSS).


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2012 CBAT
2012 February 12                 (CBET 3017)              Daniel W. E. Green