Electronic Telegram No. 2520
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 2010jb IN IC 1615
     Colin Drescher, Calamvale, Queensland, Australia, reports the discovery
of an apparent supernova (red mag 15.6) by Stuart Parker (Oxford, Canterbury,
New Zealand) as a member of the Backyard Observatory Supernova Search team,
on unfiltered images taken using a 35-cm Celestron C14 f/6.3 Schmidt-Cassegrain
telescope (+ ST-10 CCD camera) on Oct. 30.614 and 30.615 UT.  The new object
is located at R.A. = 1h04m07s.68, Decl. = -51d08'05".4 (equinox 2000.0;
measured by Drescher), which is 6" east and 6" south of the nucleus of the
galaxy IC 1615.  Nothing is visible at this position on an image taken by
Parker on Oct. 18.369 (limiting red mag 19.1).

     N. Morrell, Las Campanas Observatory, Carnegie Supernova Project, reports
that a spectrum (range 335-956 nm), obtained on Oct 31.24 UT with the Las
Campanas 2.5-m du Pont telescope (+ Boller and Chivens spectrograph), shows
2010jb to be a young type-Ia supernova.  Cross-correlation with a library of
supernova spectra via the Supernova Identification tool (SNID, Blondin and
Tonry 2007, Ap.J. 666, 1024) suggests that 2010jb is a normal type-Ia
supernova around one week before maximum brightness, best matching the
spectrum of SN 2003du at six days before maximum light.  Assuming for IC 1615
a recession velocity of 7671 km/s (Mathewson and Ford 1996, Ap.J. Suppl. 107,
97; via NED), the minimum of the Si II 635.5-nm absorption is blueshifted
by 11800 km/s.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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                         (C) Copyright 2010 CBAT
2010 November 1                  (CBET 2520)              Daniel W. E. Green