Electronic Telegram No. 3218
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 2012en IN PGC 14498 = PSN J04072528+0145333
     F. Ciabattari and E. Mazzoni, Borgo a Mozzano, Italy, report their
discovery of an apparent supernova (mag 17.8) on unfiltered CCD images
(limiting mag 19) obtained on Sept. 9.12 and 10.16 UT with a 0.5-m
Newtonian telescope in the course of the Italian Supernovae Search Project.
The new object is located at R.A. = 4h07m25s.28, Decl. = +1d45'33".3 (equinox
2000.0; astrometry with respect to UCAC-2 stars), which is 24" west and 7"
south of the center of the galaxy PGC 14498 = MCG +00-11-12.  The variable
was designated PSN J04072528+0145333 when it was posted at the Central
Bureau's TOCP webpage and is here designated SN 2012en based on the
spectroscopic confirmation reported below.  Additional magnitudes for 2012en:
1991 Oct. 14, [20.3 (Palomar Sky Survey, J plate, via Digitized Sky Survey;
reported by Ciabattari); 1995 Oct. 18, [20.3 (POSS, F plate, via DSS;
reported by Ciabattari); 2012 Sept. 11.426, 18.3 (Joseph Brimacombe, Cairns,
Australia; luminance filter; position end figures 25s.12, 32".4; image posted
at website URL http://www.flickr.com/photos/43846774@N02/7978210149/).

     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 PSN J04072528+0145333 = SN 2012en,
obtained on Sept. 11.13 UT with the Asiago 1.82-m Copernico Telescope (+
AFOSC; range 350-820 nm, resolution 1.3nm), indicates that it is a type-Ia
supernova.  Adopting for the host galaxy (PGC 14498) a redshift z = 0.017295
(Saunders et al. 2000, MNRAS 317, 55; via NED), comparison with a library of
supernova spectra via GELATO (Harutyuyan et al. 2008, A.Ap. 488, 383)
indicates that 2012en is a type-Ia event around one month after maximum light.

     F. Taddia, Stockholm University, reports on optical spectroscopy of PSN
J04072528+0145333 = SN 2012en, obtained with the Nordic Optical Telescope
(+ ALFOSC; range 350-900 nm, resolution 0.8 nm) on Sept. 11.15 UT.  The
fully reduced spectrum, cross-correlated with a library of supernova spectra
using the "Supernova Identification" code (Blondin and Tonry 2007, Ap.J. 666,
1024), shows 2012en to be a type-Ia supernova at 40 days after maximum light.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2012 CBAT
2012 September 12                (CBET 3218)              Daniel W. E. Green