[IAUC] CBET 2873: 20111026 : SUPERNOVA 2011ha

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                                                  Electronic Telegram No. 2873
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 2011ha
     Vladimir Lipunov, Sternberg Astronomical Institute, reports the discovery
by P. Balanutsa of the discovery of an apparent supernova (mag 18.5) on
unfiltered CCD images (limiting mag 19.4-19.5) taken on Sept. 30.87 and 30.90
UT in the course of the MASTER Net project (http://observ.pereplet.ru/) at the
MASTER-Tunka observatory.  The new object is located at R.A. = 3h57m40s.87,
Decl. = +10d09m55s.2 (equinox 2000.0 presumed), which is 5".3 east and 17".8
south of the center of the presumed host galaxy (which they identify as PGC
1375631).  Nothing is visible at this position on an unfiltered image taken
at the MASTER-Kislovodsk observatory on 2010 Sept. 18.96 (limiting mag 19.6).
An image of the variable, which is designated SN 2011ha based on the
spectroscopic confirmation reported below, is posted at the following website
URL:  http://observ.pereplet.ru/images/SN110830/PSN_PGC1375631/S1.png.

     P. Ochner, S. Valenti, S. Benetti, A. Pastorello, and L. Tomasella,
Istituto Nazionale di Astrofisica (INAF), Osservatorio Astronomico di Padova;
and F. Bufano, INAF, Osservatorio Astronomico di Catania, on behalf of a
larger collaboration, report that a spectrum of SN 2011ha, obtained on Oct.
18.33 UT with the New Technology Telescope (+ EFOSC2; range 360-930 nm;
resolution 1.8 nm), shows it to be a type-Ia supernova.  Cross-correlation with
a library of supernova spectra using the "Supernova Identification" code
(SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) suggests a normal type-Ia
supernova about 10 days after its B-band maximum at a redshift z = 0.094.  The
expansion velocity derived from the Si II 635.5-nm minimum is then about 10600
km/s.


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                         (C) Copyright 2011 CBAT
2011 October 26                  (CBET 2873)              Daniel W. E. Green