[IAUC] CBET 2649: 20110205 : SUPERNOVA 2011U IN UGC 2985

[quai en eps.harvard.edu]

                                                  Electronic Telegram No. 2649
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 2011U IN UGC 2985
     Further to CBET 2640, P. Blanchard, J. Kodros, S. B. Cenko, W. Li, and
A. V. Filippenko report the LOSS/KAIT discovery of an apparent supernova on
unfiltered KAIT images:

 SN       2011 UT       R.A. (2000.0) Decl.      Mag.      Offset
 2011U   Jan. 28.22   4 13 33.94  +27 32 36.7   17.6    5".2 E, 6".7 N

Additional unfiltered CCD magnitudes for 2011U:  Jan. 8.27 UT, [19.0 (KAIT);
29.14, 16.6 (R. A. Koff, Bennett, CO, U.S.A.; position end figures 33s.82,
36".0, from 23 co-added images); 29.21, 17.5.  This object was designated
PSN J04133394+2732367 on the Central Bureau's TOCP webpage.

     D. Milisavljevic, J. Parrent, and R. Fesen, Dartmouth College, report on
low-dispersion spectra (range 430-780 nm) taken on Feb. 2 and 3 UT with the
2.4-m Hiltner telescope (+ CCDS) at MDM Observatory.  PSN J04133394+2732367
= SN 2011U is a type-Ia supernova.  Comparison with a library of supernova
spectra using the "Supernova Identification" tool (SNID; Blondin and Tonry
2007, ApJ. 666, 1024) provides a reasonable match to type-Ia normal supernova
events at a few days before maximum light.  The spectra indicate significant
reddening, and host-galaxy H-alpha emission indicates a recessional velocity
of 3800 km/s.


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                         (C) Copyright 2011 CBAT
2011 February 5                  (CBET 2649)              Daniel W. E. Green