[IAUC] CBET 3242: 20120930 : SUPERNOVA 2012fe

[quai en eps.harvard.edu]

                                                  Electronic Telegram No. 3242
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 2012fe
     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
 2012fe   Sep. 26.15   17 43 12.18  +36 46 02.5   17.6     2".7 W

Additional CSS magnitudes for 2012fe:  June 20.29 UT, [20.2; Sept. 6.17, 17.5.

     L. Tomasella, S. Benetti, E. Cappellaro, P. Ochner, A. Pastorello, M.
Turatto, S. Valenti, and M. Fiaschi, Osservatorio Astronomico di Padova,
Istituto Nazionale di Astrofisica, report that a low-signal-to-noise
spectrogram of 2012fe, obtained on Sept. 28.81 UT with the Asiago 1.82-m
Copernico Telescope (+ AFOSC; range 360-820 nm; resolution 1.9 nm), suggests
that this is a peculiar type-Ia supernova.  Adopting a redshift of about 0.05,
cross-correlation with a library of supernova spectra via the "Supernova
Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024), and
best fits with the GELATO software tool (Harutyuyan et al. 2008, A.Ap. 488,
383) using a library of supernovae spectra, show that 2012fe is most similar
to several peculiar type-Ia (1991T-like) supernovae about fifteen days after
maximum.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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                         (C) Copyright 2012 CBAT
2012 September 30                (CBET 3242)              Daniel W. E. Green