[IAUC] CBET 2997: 20120126 : SUPERNOVA 2011kb = PSN J07211428-6205308

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                                                  Electronic Telegram No. 2997
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 2011kb = PSN J07211428-6205308
     L. A. G. Monard, Calitzdorp, Western Cape, South Africa, reports his
discovery of an apparent supernova (mag 16.8) on several unfiltered CCD images
taken on 2011 Dec. 16.026 UT.  The new object is located at R.A. = 7h21m14s.28,
Decl. = -62d05'30".8 (equinox 2000.0), which is 8" east and 4" north of the
core of the presumed host galaxy.  The variable was designated PSN
J07211428-6205308 when it was posted at the Central Bureau's TOCP webpage
and is here designated SN 2011kb based on the spectroscopic confirmation
reported below.  Additional CCD magnitudes for 2011kb (unfiltered unless
noted otherwise):  2011 May 30.72, [18.5 (Monard); Oct 8.108, 16.1 (Monard);
Nov. 7.163, 16.1 (Monard); 25.956, 16.4 (Monard); Dec. 16.026, 16.8 (Monard);
28.984, 18.2 (Monard); 29.914, 18.1 (Monard); 31.720, 17.0 (Joseph Brimacombe,
Cairns, Australia; 41-cm RCOS telescope + STL6K camera + infrared filter;
range > 700 nm; position end figures 14s.34, 31".2; image posted at website
URL http://www.flickr.com/photos/43846774@N02/6610070865/); 2012 Jan. 5.667,
16.9 (Brimacombe; position end figures 14s.23, 31".5; image posted at website
URL http://www.flickr.com/photos/43846774@N02/6729145569/).

     N. Morrell, Las Campanas Observatory, on behalf of the Carnegie Supernova
Project, reports that optical spectroscopy (range 430-1000 nm), obtained on
2012 Jan. 16 UT with the 6.5-m Magellan I (Baade) telescope (+ IMACS), shows
that PSN J07211428-6205308 = SN 2011kb is a type-II supernova several months
after explosion.  SNID suggests for 2011kb a redshift of 0.010 (similar to the
neighboring galaxy NGC 2369B) and gives good matches with a variety of type-II
supernovae between 4 and 6 months after maximum brightness.  Combining this
information with the discovery date, it is possible to infer that the best
reliable match is with the type-II-P supernova 2004et at 147 days after maximum
light.


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                         (C) Copyright 2012 CBAT
2012 January 26                  (CBET 2997)              Daniel W. E. Green