[IAUC] CBET 3105: 20120516 : SUPERNOVA 2012cc IN NGC 4419 = PSN J12265681+1502455

Mar Mayo 15 19:16:48 ART 2012

                                                  Electronic Telegram No. 3105
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 2012cc IN NGC 4419 = PSN J12265681+1502455
     Further to CBET 3037, S. B. Cenko, M. Kandrashoff, W. Li, and A. V.
Filippenko report the LOSS discovery of an apparent supernova on unfiltered
KAIT images:

 SN       2012 UT        R.A. (2000.0) Decl.      Mag.      Offset
 2012cc   Apr. 29.33   12 26 56.81  +15 02 45.5   18.2    7".7 E, 6".7 S

The variable was designated PSN J12265681+1502455 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2012cc based on the
spectroscopic confirmation reported below.  Additional CCD magnitudes for
2012cc:  Apr. 8.41 UT, [18.9 (KAIT); May 11.23, 15.7 (KAIT); 13.509, 14.9 (J.
Brimacombe, Cairns, Australia; infrared filter; position end figures 56s.83,
45".8; image posted at http://www.flickr.com/photos/43846774@N02/7192829202/).

     G. H. Marion and D. Milisavljevic, Harvard-Smithsonian Center for
Astrophysics (CfA), on behalf of the CfA Supernova Group, reports that a
spectrum (range 340-740 nm) of PSN J12265681+1502455 = 2012cc was obtained on
May 13 UT by J. Irwin with the F. L. Whipple Observatory 1.5-m telescope (+
FAST).  The object is a heavily reddened type-II supernova.  H-alpha produces
a broad P-Cyg feature that is similar to that of SN 1987K near maximum
brightness (Filippenko 1988, A.J. 96, 1941).  The velocity of H-alpha is 13500
km/s, measured at the absorption minimum, but strong reddening suppresses
other Balmer series lines.  Also similar to SN 1987K, there is evidence for
He I in absorption.

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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2012 CBAT
2012 May 16                      (CBET 3105)              Daniel W. E. Green