[IAUC] CBET 2837: 20110929 : SUPERNOVA 2011ge IN UGC 11253 = PSN J18294090+2304010

Jue Sep 29 01:30:07 ART 2011

                                                  Electronic Telegram No. 2837
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 2011ge IN UGC 11253 = PSN J18294090+2304010
     Further to CBET 2772, S. B. Cenko, W. Li, and A. V. Filippenko report the
LOSS discovery of an apparent supernova on unfiltered KAIT images:

 SN       2011 UT        R.A. (2000.0) Decl.      Mag.      Offset
 2011ge   Sep. 21.14   18 29 40.90  +23 04 01.0   19.5    17".4 E, 5".4 S

This variable was designated PSN J18294090+2304010 when it was posted on the
Central Bureau's TOCP webpage and is here designated SN 2011ge based on the
spectroscopic report below.  Additional KAIT magnitudes for 2011ge:  a co-
added image from Aug. 2011, [20.5; Sept. 23.15 UT, 19.4.  Joseph Brimacombe,
Cairns, Australia, has posted an unfiltered CCD image that he took on Sept.
27.199 at website URL http://www.flickr.com/photos/43846774@N02/6193373952/.

     J. M. Silverman, S. B. Cenko, and A. V. Filippenko, University of
California, Berkeley, report that inspection of a CCD spectrum (range 340-1000
nm), obtained on Sept. 26 UT with the 10-m Keck I telescope (+ LRIS), shows
that PSN J18294090+2304010 = SN 2011ge is a highly reddened type-II supernova.
After removal of the host-galaxy recession velocity of 4000 km/s, determined
from narrow emission features, the absorption minimum of the H-alpha line is
found to be blueshifted by about 17200 km/s.

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      superseded by text appearing later in the printed IAU Circulars.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 2837)              Daniel W. E. Green