[IAUC] CBET 3335: 20121208 : SUPERNOVA 2012hl = PSN J00501776+2431522

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                                                  Electronic Telegram No. 3335
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 2012hl = PSN J00501776+2431522
     S. Howerton, Arkansas City, KS, U.S.A.; A. J. Drake, S. G. Djorgovski,
A. Mahabal, M. J. Graham, and R. Williams, California Institute of Technology;
J. L. Prieto, Princeton University; M. Catelan, Pontificia Universidad
Catolica de Chile; R. H. McNaught, Australian National University; E. C.
Beshore and S. M. Larson, Lunar and Planetary Laboratory, University of
Arizona; and E. Christensen, Gemini Observatory, report the discovery of an
apparent supernova in public images from the Catalina Sky Survey (CSS).

 SN       2012 UT       R.A. (2000.0) Decl.      Mag.      Offset
 2012hl   Dec. 4.11    0 50 17.76  +24 31 52.2   17.4    1".0 E, 2".2 S

Nothing was visible at this position on a CSS image from Nov. 13.22 UT
(limiting mag 19.5).  The variable was designated PSN J00501776+2431522
when it was posted at the Central Bureau's TOCP webpage and is here
designated SN 2012hl based on the spectroscopic confirmation reported below.

     A. Morales-Garoffolo and N. Elias-Rosa, Institut de Ciencies de L'Espai
(CSIC-IEEC), Barcelona; S. Hachinger, Lehrstuhl fuer Astronomie, University
of Wuerzburg; and S. Taubenberger, Max-Planck-Institut fuer Astrophysik,
Garching, report that optical spectroscopy (range 400-820 nm; resolution 1.3
nm), obtained on Dec. 6.80 UT with the Asiago 1.82-m Copernico Telescope (+
AFOSC), shows that PSN J00501776+2431522 = SN 2012hl is a type-Ia supernova
at redshift z around 0.033 (determined from the H_alpha in the host galaxy).
A good match is found with several normal type-Ia supernovae a few days
before maximum light.  The expansion velocity of the ejected material, as
deduced from the position of the Si II 635.5-nm absorption, is about 13500
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
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                         (C) Copyright 2012 CBAT
2012 December 8                  (CBET 3335)              Daniel W. E. Green