[IAUC] CBET 3222: 20120913 : SUPERNOVA 2012ep

[quai en eps.harvard.edu]

                                                  Electronic Telegram No. 3222
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 2012ep
     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; and S. M. Larson and E.
Christensen, Lunar and Planetary Laboratory, University of Arizona, report the
discovery of an apparent supernova in unfiltered Catalina Sky Survey (CSS)
images:

 SN       2012 UT        R.A. (2000.0) Decl.      Mag.      Offset
 2012ep   Aug. 28.31   23 16 22.09  +24 15 18.6   18.9      2" north

Nothing was visible at this position on a CSS image taken on June 22.42 UT
(limiting mag 20.2).

     L. Tomasella, S. Benetti, E. Cappellaro, A. Pastorello, M. Turatto, and
S. Valenti, Osservatorio Astronomico di Padova, Istituto Nazionale di
Astrofisica, report that a spectrogram of 2012ep, obtained on Sept. 11.01 UT
with the Asiago 1.82-m Copernico Telescope (+ AFOSC; range 350-820 nm,
resolution 1.3 nm), suggests that this is a normal type-Ia supernova.
Cross-correlation with a library of supernova spectra via the "Supernova
Identification" code (SNID; Blondin and  Tonry 2007, Ap.J. 666, 1024) shows
that 2012ep is similar to several normal type-Ia supernovae at two weeks
after maximum with a redshift of about 0.1.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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                         (C) Copyright 2012 CBAT
2012 September 13                (CBET 3222)              Daniel W. E. Green