[IAUC] CBET 2561: 20101203 : SUPERNOVA 2010kg IN NGC 1633
quai en eps.harvard.edu
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Mie Sep 14 16:19:24 ART 2011
Electronic Telegram No. 2561
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 2010kg IN NGC 1633
[NOTE: This text replaces that on CBET 2560.]
Further to CBET 2552, I. Nayak, S. B. Cenko, W. Li, and A. V. Filippenko
report the LOSS discovery of an apparent supernova on unfiltered KAIT images:
SN 2010 UT R.A. (2000.0) Decl. Mag. Offset
2010kg Nov. 29.34 4 40 08.40 + 7 21 00.0 18.8 10".5 W, 3".0 N
Additional KAIT magnitudes for 2010kg: a co-added frame from Sept.-Oct., [20.5;
Nov. 30.37 UT, 17.7.
G. H. Marion, P. Challis, and R. Kirshner, Harvard-Smithsonian Center for
Astrophysics (CfA), on behalf of the CfA Supernova Group, report that a spectrum
(range 340-740 nm) of 2010kg was obtained on Dec. 1 UT by M. Calkins with the
F. L. Whipple Observatory 1.5-m telescope (+ FAST). Cross-correlation with a
library of supernova spectra using the "Supernova Identification" code (SNID;
Blondin and Tonry 2007, Ap.J. 666, 1024) shows that 2010kg is a type-Ia
supernova more than one week before maximum brightness. The velocity of the
Si II 635.5-nm feature, measured at the absorption minimum, is about 21200 km/s.
NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.
(C) Copyright 2010 CBAT
2010 December 3 (CBET 2561) Daniel W. E. Green
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