[IAUC] CBET 3706: 20131112 : SUPERNOVA 2013gh IN NGC 7183 = PSN J22022184-1855004

[quai en eps.harvard.edu]

                                                  Electronic Telegram No. 3706
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 2013gh IN NGC 7183 = PSN J22022184-1855004
     Further to CBET 3302, K. Hayakawa, S. B. Cenko, W. Zheng, W. Li, and A.
V. Filippenko report the LOSS discovery of an apparent supernova in NGC 7183
on unfiltered KAIT images:

 SN       2013 UT       R.A. (2000.0) Decl.      Mag.      Offset
 2013gh   Aug. 8.34   22 02 21.84  -18 55 00.4   18.3     3".2 E, 1".2 S

The variable was designated PSN J22022184-1855004 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2013gh based on the
spectroscopic confirmation reported below.  Additional CCD magnitudes for
2013gh:  Aug. 6.38 UT, [18.9 (KAIT); 9.36, 18.4 (KAIT); 11.538, R = 15.9 (J.
Brimacombe, Cairns, Australia; 32-cm RCOS telescope + STL6K camera + red
filter; position end figures 21s.85, 00".4; image posted at website URL
http://www.flickr.com/photos/43846774@N02/9500512932/); 12.522, 15.3
(Brimacombe; 41-cm RCOS telescope + STL6K camera + infrared filter; bandpass
> 700 nm; position end figures 21s.87, 00".2; image posted at website URL
http://www.flickr.com/photos/43846774@N02/9496704281/).

     David Sand, Texas Tech University; and Stefano Valenti, D. A. Howell, and
M. L. Graham, Las Cumbres Observatory Global Telescope and University of
California at Santa Barbara, report that a spectrogram of PSN J22022184-1855004
= SN 2013gh was obtained with FLOYDS (wavelength range 320-1000 nm) on the
"Faulkes Telescope South" on Aug. 11.56 UT.  The spectrum reveals 2013gh to be
a type-Ia supernova approximately a week before maximum light, with a redshift
consistent with that of the host galaxy, NGC 7183 (z = 0.0088, from Fisher et
al. 1995, Ap.J. Suppl. 100, 69; via NED).  The supernova is at approximately
magnitude 15.7, corresponding to an absolute magnitude of -17.2, and so may be
underluminous and/or reddened; this is consistent with its position in the
peculiar S0-type galaxy.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2013 CBAT
2013 November 12                 (CBET 3706)              Daniel W. E. Green