Electronic Telegram No. 3350
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 2012ht IN NGC 3447
     P. Ochner, A. Pastorello, L. Tomasella, S. Benetti, E. Cappellaro, and M.
Turatto, Osservatorio Astronomico di Padova, Istituto Nazionale di Astrofisica,
report that optical spectroscopy (range 340-800 nm; resolution 0.7 nm),
obtained on Dec. 22.03 UT with the Asiago 1.22-m Galileo Telescope (+ Boller &
Chivens spectrograph) shows that PSN J10532275+1646349 = SN 2012ht (cf. CBET
3349) is a young type-Ia supernova.  Adopting a redshift of z about 0.0036
(Guthrie and Napier 1996, A.Ap. 310, 353; via NED), the best match is found
with a number of type-Ia supernovae at several days before the maximum light.
The expansion velocity of the ejected material, as deduced from the position
of the Si II 635.5-nm absorption, is about 13700 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).


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2012 CBAT
2012 December 23                 (CBET 3350)              Daniel W. E. Green