[IAUC] CBET 2649: 20110205 : SUPERNOVA 2011U IN UGC 2985
quai en eps.harvard.edu
quai en eps.harvard.edu
Mie Sep 14 16:19:07 ART 2011
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.
NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.
(C) Copyright 2011 CBAT
2011 February 5 (CBET 2649) Daniel W. E. Green
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