[IAUC] CBET 3271: 20121026 : SUPERNOVA 2012fl

[quai en eps.harvard.edu]

                                                  Electronic Telegram No. 3271
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 2012fl
     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
 2012fl   Oct. 13.36   2 56 04.38  + 0 56 01.0   19.2    1".2 E, 0".3 N

Nothing was visible at this postion on a CSS image from Feb. 12.15 UT
(limiting mag 20.2).

     L. Tomasella, S. Benetti, E. Cappellaro, A. Pastorello, and M. Turatto,
Osservatorio Astronomico di Padova, Istituto Nazionale di Astrofisica, report
that a spectrogram of 2012fl, obtained on Oct. 22.97 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 2012fl is similar to several normal
type-Ia supernovae a few days after maximum at a redshift of about 0.086.
The expansion velocity deduced from the Si II 635.5-nm absorption is then
10600 km/s.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2012 CBAT
2012 October 26                  (CBET 3271)              Daniel W. E. Green