Electronic Telegram No. 3847
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 2014am
     V. Lipunov reports that D. Denisenko has discovered an apparent supernova
(magnitude 17.4) on unfiltered CCD images (limiting mag 19.1) obtained with
the MASTER-Kislovodsk auto-detection system (double 0.40-m f/2.5 reflector)
on Mar. 26.008 UT.  The new object is located at R.A. = 15h23m18s.48, Decl. =
+18d17'33".3 (equinox 2000.0), which is 1" west and 6" south of the center of
galaxy SDSS J152318.53+181739.3.  D. Denisenko and E. Gorbovskoy (Lomonosov
Moscow State University) report that nothing was visible at this position on
MASTER-Kislovodsk archival images taken on 2013 Dec. 25.1 (limiting mag 18.5).
The discovery and reference images have been posted at the following website
URL:  http://master.sai.msu.ru/static/OT/152318.48181733.3.png.

     G. Terreran, L. Tomasella, S. Benetti, E. Cappellaro, N. Elias-Rosa, P.
Ochner, A. Pastorello, M. Turatto, Osservatorio Astronomico di Padova,
Istituto Nazionale di Astrofisica, report that an optical spectrogram (range
340-820 nm; resolution 1.3 nm) of 2014am, obtained on Apr. 1.15 UT with the
Asiago 1.82-m Copernico Telescope (+ AFOSC), shows it to be a type-Ia
supernova at redshift around 0.053.  The best match is found with several
type-Ia supernovae about a week after B-band maximum light.  An expansion
velocity of about 10400 km/s is derived from the minimum of the Si II 635-nm
line.  The Asiago classification spectra are posted at website URL
http://sngroup.oapd.inaf.it; 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      superseded by text appearing later in the printed IAU Circulars.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 2014 CBAT
2014 April 5                     (CBET 3847)              Daniel W. E. Green