[IAUC] CBET 2951: 20111225 : SUPERNOVA 2011jf IN UGC 2134 = PSN J02385461+2750487

Dom Dic 25 02:37:43 ART 2011

                                                  Electronic Telegram No. 2951
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 2011jf IN UGC 2134 = PSN J02385461+2750487
     Giancarlo Cortini, Predappio, Italy, reports the discovery of an apparent
supernova (mag 17.5) on several unfiltered CCD images (limiting mag 18.5)
taken on Dec. 22.833 UT with a Celestron 14 telescope (+ SXVR-H9 camera).  The
new object is located at R.A. = 2h38m54s.61, Decl. = +27d50'48".7 (equinox
2000.0), which is 3" east and 1" south of the center of UGC 2134.  Nothing
is visible at this position on Cortini's images from Oct. 15.90 and Nov. 20.88
(limiting mag 18.5) or on the Palomar Sky Survey (red and blue plates).  The
variable was designated PSN J02385461+2750487 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2011jf based on the
spectroscopic confirmation reported below.

     L. Tomasella, S. Valenti, S. Benetti, F. Bufano, M. Fiaschi, A.
Pastorello, and P. Ochner, Osservatorio Astronomico di Padova, Istituto
Nazionale di Astrofisica, on behalf of a larger collaboration, report that a
spectrogram of PSN J02385461+2750487 = SN 2011jf, obtained on Dec. 23.72 UT
with the Asiago 1.82-m Copernico Telescope (+ AFOSC; range 350-820 nm;
resolution 2.4 nm), suggests that 2011jf is a type-Ib/c supernova showing
relatively broad spectral features.  Good fits to this spectrum found by
GELATO (Harutyunyan et al. 2008, A.Ap. 488, 383; available at website URL
https://gelato.tng.iac.es/login.cgi) suggest that 2011jf shows some similarity
with SN 2004aw (Taubenberger et al. 2006, MNRAS 371, 1459) around maximum.


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                         (C) Copyright 2011 CBAT
2011 December 25                 (CBET 2951)              Daniel W. E. Green