Electronic Telegram No. 3464
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 2011kg
     R. M. Quimby, Kavli Institute for the Physics and Mathematics of the
Universe; A. Gal-Yam, I. Arcavi, and O. Yaron, Weizmann Institute; and A.
Horesh and K. Mooley, California Institute of Technology, on behalf of the
PTF collaboration, report the discovery of a supernova (mag about 19.1),
designated 2011kg, on R-band CCD images taken on 2011 Dec. 21 UT with the
1.2-m Oschin telescope at Palomar Observatory in the course of the "Palomar
Transient Factory" survey.  The new object is located at R.A. = 1h39m45s.51,
Decl. = +29d55'27".0 (equinox 2000.0); it brightened to mag 19.1 on Dec. 27.

     C. Inserra, S. J. Smartt, M. Fraser, D. Young, K. Smith, D. Wright, R.
Kotak, M. McCrum, L. Magill, and T.-W. Chen, Queen's University, Belfast; A.
Pastorello and S. Benetti, Osservatorio Astronomico di Padova, Istituto
Nazionale di Astrofisica; S. Valenti, Las Cumbres Observatory Global Telescope
and University of California at Santa Barbara; F. Bresolin, R. Kudritzki, J.
Tonry, E. Magnier, M. Huber, K. Chambers, N. Kaiser, J. Morgan, W. Burgett, J.
Heasley, W. Sweeney, C. Waters, and H. Flewelling, University of Hawaii; C.
Stubbs, Harvard University; P. A. Price, Princeton University; J. Sollerman,
F. Taddia, and M. Ergon, Oscar Klein Centre, Stockholm; G. Leloudas, Dark
Cosmology Centre, Copenhagen; and S. Taubenberger, Max-Planck-Institut fuer
Astrophysik, Garching, report that they obtained a spectrogram of 2011kg on
2012 Jan. 9 UT with the Nordic Optical Telescope (+ ALFOSC).  The object is
offset from a faint (magnitude r about 20.9) galaxy detected by the Sloan
Digital Sky Survey.  A good match is obtained with the spectrum of SN 2010gx
(cf. CBET 2413), a super-luminous type-Ic supernova, at one week after
maximum light.  Narrow absorption features consistent with the Mg II doublet
and emission lines from the host galaxy set the redshift at z = 0.19.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2013 CBAT
2013 April 10                    (CBET 3464)              Daniel W. E. Green