Electronic Telegram No. 3699
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 2013gc IN ESO 430-20 = PSN J08071188-2803263
     R. Antezana, M. Hamuy, L. Gonzalez, R. Cartier, F. Forster, and F.
Carrasco, Universidad de Chile; G. Pignata, Y. Apostolovski, E. Paillas, S.
Varela, F. Bufano, F. Olivares, and K. Takats, Universidad Andres Bello; F.
Aros, Pontificia Universidad Catolica de Chile; B. Conuel, Wesleyan
University; G. Folatelli, IPMU, University of Tokyo; and D. E. Reichart, J. B.
Haislip, J. P. Moore, and A. P. LaCluyze, University of North Carolina at
Chapel Hill, on behalf of the CHASE project (which is part of the Millennium
Center for Supernova Science collaboration), report the discovery of an
apparent Supernova (mag approximately 16.7) on an unfiltered image taken on
Nov. 7.34 UT with the 0.41-m 'PROMPT 3' telescope located at Cerro Tololo.
The new object is located at R.A. = 8h07m11s.88 +/- 0".2, Decl. =
-28o03'26".3 +/- 0".2 (equinox 2000.0), which is about 43".3 east and 18".0
south of the center of the galaxy in ESO 430-20 (which also hosted SN 2013ak;
cf. CBET 3437).  The variable is also present in an image taken on Nov. 8.25
at mag approximately 16.7, but nothing is visible at this position on
archival images taken on June 17.05 (limiting mag 20.2).  The variable was
designated PSN J08071188-2803263 when it was posted at the Central Bureau's
TOCP webpage and is here designated SN 2013gc based on the spectroscopic
confirmation reported below.

     N. Morrell, Las Campanas Observatory; and G. Pignata, Universidad Andres
Bello, on behalf of the Carnegie Supernova Project and the Millennium Center
for Supernova Science, report optical spectroscopy (range 360-920 nm) of PSN
J08071188-2803263 = SN 2013gc, obtained on Nov. 8.3 UT with the Las Campanas
2.5-m du Pont telescope (+ WFCCD).  Cross-correlation with a library of
supernova spectra using the "Supernova Identification" code (SNID; Blondin and
Tonry 2007, Ap.J. 666, 1024) shows that 2013gc is a type-IIn supernova similar
to SN 1996L (Benetti et al. 1999, MNRAS 305, 811) at about two months after
explosion.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2013 CBAT
2013 November 11                 (CBET 3699)              Daniel W. E. Green