Electronic Telegram No. 3760
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 2013hm IN PGC 60984
     V. Lipunov, Sternberg Astronomical Institute (SAI), reports the discovery
by D. Denisenko of an apparent supernova (mag 17.0) on unfiltered CCD images
(limiting mag 18.7) taken with the MASTER-Tunka auto-detection system (double
0.40-m f/2.5 reflector) on Nov. 26.44 UT.  The new object is located at R.A. =
17h50m48s.49, Decl. = +47d11'50".9 (equinox 2000.0), which is 44".3 west and
0".1 south of the center of PGC 60984.  Denisenko and E. Gorbovskoy (SAI)
report that nothing was visible at this position on MASTER-Tunka archival
images from 2013 Mar. 30.73 (limiting mag 18.6).  The discovery and reference
images are posted at http://master.sai.msu.ru/static/OT/175048.49471150.9.jpg.

     M. Turatto, P. Ochner, A. Pastorello, L. Tomasella, S. Benetti, E.
Cappellaro, and N. Elias-Rosa, Osservatorio Astronomico di Padova, Istituto
Nazionale di Astrofisica, report that an optical spectrogram (range 340-820
nm; resolution 1.3 nm) of 2013hm, obtained on Dec. 12.72 UT with the Asiago
1.82-m Copernico Telescope (+ AFOSC), shows it to be a type-Ia supernova.
Adopting a redshift z = 0.03199 for the host galaxy (CGCG 253-37; Falco et al.
2009, PASP 111, 438; via NED), a good match is found with the type-Ia
supernova 2004eo (Pastorello et al. 2007, MNRAS 377, 1531) about one month
after B-band maximum light.  The Asiago classification spectra are posted at
website URL http://sngroup.oapd.inaf.it.  The classification was made via
GELATO (Harutyunyan et al. 2008, A.Ap. 488, 383) and SNID (Blondin and Tonry
2007, Ap.J. 666, 1024).


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2013 CBAT
2013 December 19                 (CBET 3760)              Daniel W. E. Green