[IAUC] CBET 2968: 20120106 : SUPERNOVA 2011jr IN UGC 3676 = PSN J07063992+2353370

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                                                  Electronic Telegram No. 2968
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 2011jr IN UGC 3676 = PSN J07063992+2353370
     J. Newton and T. Puckett report the discovery of an apparent supernova
(mag 17.2) on an unfiltered CCD image (limiting mag 19.3) taken with a 0.40-m
reflector at Portal, AZ, U.S.A., on 2011 Dec. 25.243 UT in the course of the
Puckett Observatory Supernova Search.  The new object is located at R.A. =
7h06m39s.92, Decl. = +23o53'37".0 (equinox 2000.0), which is 2".5 west and
0".1 south of the center of UGC 3676.  Puckett has posted one of their images
at website URL http://www.possdata.com/PSNJ07063992+2353370.jpg.  The variable
was designated PSN J07063992+2353370 when it was posted at the Central
Bureau's TOCP webpage and is here designated SN 2011jr based on the
spectroscopic confirmation reported below.  Additional CCD magnitudes for
2011jr (unfiltered unless noted otherwise):  2011 Dec. 8, [19.0 (Puckett);
26.228, 17.2 (Puckett; 40-cm reflector at Portal); 29.271, 17.1 (Joseph
Brimacombe, Cairns, Australia; remotely using a 51-cm RCOS telescope + STL11K
camera + luminance filter at the New Mexico Skies Observatory near Mayhill,
NM, U.S.A.; position end figures 39s.88, 37".2; image posted at website URL
http://www.flickr.com/photos/43846774@N02/6598519955/).

     J. M. Silverman and A. V. Filippenko, University of California, Berkeley,
report that inspection of a CCD spectrum (range 340-1000 nm), obtained on 2012
Jan. 3 UT with the Shane 3-m reflector (+ Kast spectrograph) at Lick
Observatory, shows that PSN J07063992+2353370 = SN 2011jr is a highly reddened
type-Ia supernova.  After removal of the host-galaxy recession velocity of
6830 km/s (measured from narrow host-galaxy absorption lines), they find the
absorption minimum of the Si II 635.5-nm line to be blueshifted by about
11600 km/s.  Cross-correlation with a library of supernova spectra using the
"SuperNova IDentification" code (SNID; Blondin and Tonry 2007, Ap.J. 666,
1024) indicates that the object is a normal type-Ia supernova near maximum
brightness.  Na I D absorption at the redshift of the host galaxy is detected
with an equivalent width of approximately 0.2 nm.


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                         (C) Copyright 2012 CBAT
2012 January 6                   (CBET 2968)              Daniel W. E. Green