Electronic Telegram No. 3593
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 2013ea = PSN J01201645+3010557
     V. Lipunov, Sternberg Astronomical Institute, reports the discovery by S.
Shurpakov of a possible supernova (mag 16.9) on two unfiltered survey images
(limiting mag 19.6) taken on July 9.945 and 9.975 UT with the MASTER-
Kislovodsk robotic telescope (0.40-m f/2.5 reflector).  The new object is
located at R.A. = 1h20m16s.45, Decl. = +30d10'55".7 (equinox 2000.0).  The
variable was designated PSN J01201645+3010557 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2013ea based on the
spectroscopic confirmation reported below.  L. Elenin (Lyubertsy, Russia) and
I. Molotov (Moscow, Russia) confirm the variable at mag 17.2 on unfiltered
exposures (limiting mag about 19.8) obtained remotely with a 0.45-m f/2.8
telescope at ISON-NM Observatory near Mayhill, NM, USA, on July 10.421,
providing position end figures 16s.39 +/- 0".07, 55".7 +/- 0".06 (UCAC-4
reference stars); Elenin and Molotov have posted their image at website URL
http://spaceobs.org/images/TOCP/PSNJ01201645+3010557-20130710.png.

     D. D. Balam, Dominion Astrophysical Observatory, National Research
Council of Canada; M. L. Graham, Las Cumbres Observatory Global Telescope,
University of California at Santa Barbara; and E. Y. Hsiao, Las Campanas
Observatory, report that a spectrogram (range 369-700 nm, resolution 0.3 nm)
of PSN J01201645+3010557 = SN 2013ea, obtained on July 14.43 UT with the
1.82-m Plaskett Telescope of the National Research Council of Canada, shows
it to be a type-Ia supernova near maximum light.  Cross-correlation with a
library of supernova spectra using the "Supernova Identification" code
(Blondin and Tonry 2007, Ap.J. 666, 1024) indicates that 2013ea is most
similar to the type-Ia supernova 1994ae at one day after maximum.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2013 CBAT
2013 July 24                     (CBET 3593)              Daniel W. E. Green