[IAUC] CBET 3491: 20130424 : SUPERNOVA 2013bp

[quai en eps.harvard.edu]

                                                  Electronic Telegram No. 3491
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 2013bp
     A. J. Drake, S. G. Djorgovski, M. J. Graham, A. Mahabal, and R. Williams,
California Institute of Technology; J. L. Prieto, Princeton University; M.
Catelan, Pontificia Universidad Catolica de Chile; S. M. Larson and E.
Christensen, Lunar and Planetary Laboratory, University of Arizona; and R. H.
McNaught, Australian National University, report the Catalina Real-time
Transient Survey discovery of an apparent supernova in unfiltered CCD images:

 SN       2013 UT         R.A. (2000.0) Decl.      Mag.
 2013bp   Apr. 15.33   12 19 04.88  +42 24 53.9    18.6

     L. Tomasella, A. Pastorello, S. Benetti, E. Cappellaro, M. Turatto, and
P. Ochner, Osservatorio Astronomico di Padova, Istituto Nazionale di
Astrofisica, report that optical spectroscopy (range 340-820 nm; resolution
1.3 nm), obtained on Apr. 18.86 UT with the Asiago 1.82-m Copernico Telescope
(+ AFOSC), shows that 2013bp is a type-Ia supernova.  Adopting a recessional
velocity of 0.076 from the fit of the main supernova spectral features, a
good match is found with SN 1991T spectra at about 10 days after B-band
maximum.  The expansion velocity, as deduced from the position of the Si II
635.5-nm absorption, is about 10400 km/s.  The Asiago classification spectra
are posted at website URL http://graspa.oapd.inaf.it; classification was made
via GELATO (Harutyunyan et al. 2008, A.Ap. 488, 383) and SNID (Blondin and
Tonry 2007, Ap.J. 666, 1024).


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                         (C) Copyright 2013 CBAT
2013 April 24                    (CBET 3491)              Daniel W. E. Green