Electronic Telegram No. 3309
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@eps.harvard.edu (alternate cbat@iau.org)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network


SUPERNOVA 2010mb
     Sagi Ben-Ami, Weizmann Institute of Science, Israel, reports the discovery
of a supernova (mag about 21.4) on two r-band CCD images (limiting mag 21.5)
taken on 2010 Apr. 10.34 UT taken with the 1.2-m Oschin telescope at Palomar
Observatory in the course of the "Palomar Transient Factory" search.  The new
object is located at R.A. = 16h00m23s.10, Decl. = +37d44'57".0 (equinox
2000.0), which is 4" west and 3" north of the nucleus of the presumed host
galaxy, SDSS J160023.23+374454.8.  The object was not detected in an image
from 2010 Mar. 18.5 (limiting mag 21.7).  S. Ben-Ami, A. Gal-Yam, and R.
Quimby report that optical spectroscopy (range 350-1000 nm; resolution
2.5 nm), obtained on 2010 June 8 UT with the Hale 5-m telescope showed that
2010mb was then a type-Ic supernova about 75 days after the explosion at a
redshift z = 0.1325, similar to SN 1995F (Matheson et al. 2000, A.J. 121,
1648).  The Hale classification spectra are posted at the following website
URL:  http://www.weizmann.ac.il/astrophysics/wiserep/; classification was
made via SUPERFIT (Howell et al. 2005, Ap.J. 634, 1180).


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2012 CBAT
2012 November 25                 (CBET 3309)              Daniel W. E. Green