[IAUC] CBET 3700: 20131111 : SUPERNOVA 2013gd IN MCG -01-10-39 = PSN J03490564-0303283

[quai en eps.harvard.edu]

                                                  Electronic Telegram No. 3700
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 2013gd IN MCG -01-10-39 = PSN J03490564-0303283
     Further to CBET 3678, C. Casper, K. L. Fuller, W. Zheng, W. Li, and A. V.
Filippenko, University of California at Berkeley; and S. B. Cenko, Goddard
Space Flight Center, report the LOSS discovery of a supernova in MCG -01-10-39
on unfiltered KAIT images:

 SN       2013 UT       R.A. (2000.0) Decl.      Mag.      Offset
 2013gd   Nov. 9.35    3 49 05.64  - 3 03 28.3   16.9    2".5 E, 9".5 N

A finding chart for the new object was posted at the following website URL:
http://astro.berkeley.edu/~zwk/findingchart/PSN_J03490564-03032833.jpg.  The
variable was designated PSN J03490564-0303283 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2013gd based on the
spectroscopic confirmation reported below.  Additional approximate CCD
magnitudes for 2013gd:  Nov. 5.3 UT, [18.5 (KAIT); 10.075, 16.3 (Gianluca Masi,
Francesca Nocentini, and Patrick Schmeer; remotely using a 43-cm robotic
telescope near Ceccano, Italy; position end figures 05s.67, 28".6); 10.3, 16.8
(KAIT); 10.329, 16.8 (Joseph Brimacombe, Cairns, Australia; remotely with a
51-cm RCOS telescope, STXL-6303 camera located at the New Mexico Skies
observatory near Mayhill, NM, USA; position end figures 05s.65, 28".8; image
posted at website URL http://www.flickr.com/photos/43846774@N02/10789180596/).

     D. Milisavljevic, Harvard-Smithsonian Center for Astrophysics; and S.
Gottilla, MMT Observatory, report that a low-dispersion spectrogram (range
345-855 nm), obtained on Nov. 9.5 UT with the 6.5-m MMT telescope (+ Blue
Channel), shows PSN J03490564-0303283 = SN 2013gd to be a young type-II
supernova.  Cross-correlation with a library of supernova spectra using the
"Supernova Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666,
1024) shows an excellent match with the type-IIP event 1999gi at five days
before maximum light.  Using a redshift of z = 0.0134 for host galaxy, MCG
-01-10-39 (from Costa et al. 1998, A.J. 116, 1; via NED), they estimate the
minimum of the H_alpha P-Cyg absorption to be blueshifted by approximately
12700 km/s.



NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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                         (C) Copyright 2013 CBAT
2013 November 11                 (CBET 3700)              Daniel W. E. Green