Electronic Telegram No. 3846
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 2014al = PSN J16265528+3338244
     Vladimir Lipunov reports the discovery of a possible supernova (mag 16.8)
by Pavel Balanutsa on 60-s unfiltered survey images (limiting mag 19.5) taken
using the 0.40-m f/2.5 MASTER-Tunka robotic reflector and auto-detection
system on Mar. 28.779 UT.  The new object is located at R.A. = 16h26m55s.28,
Decl. = +33o38'24".4 (J2000.0) which is slightly east and 1" north of the
galaxy SDSS J162655.31+333822.9 (which has red mag 22.5) listed in the Sloan
Digital Sky Survey, and 9" west and 6" north of the nucleus of the galaxy
SDSS J162656.04+333818.3 (red mag 19.4).  The discovery and reference images
are posted at URL http://master.sai.msu.ru/static/OT/162655.28333824.4.png.
The variable was designated PSN J16265528+3338244 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2014al based on the
spectroscopic confirmation reported below.  Additional CCD magnitudes for
2014al:  2012 Feb. 21.936, [19.8 (MASTER); 2014 Apr. 1.138, 17.4 (Gianluca
Masi, Francesca Nocentini, and Patrick Schmeer; remotely using a 43-cm
telescope near Ceccano, Italy; position end figures 55s.30, 23".7).

     G. Terreran, L. Tomasella, S. Benetti, E. Cappellaro, N. Elias-Rosa, P.
Ochner, A. Pastorello, and M. Turatto, Osservatorio Astronomico di Padova,
Istituto Nazionale di Astrofisica, report that an optical spectrogram (range
340-820 nm; resolution 1.3 nm) of PSN J16265528+3338244 = SN 2014al, obtained
on Mar. 31.98 UT with the Asiago 1.82-m Copernico Telescope (+ AFOSC), shows
it to be a type-Ia supernova at redshift around 0.04.  An excellent match is
found with the type-Ia supernova 1994D (Patat et al. 1996, MNRAS 278, 111) at
a few days after B-band maximum light.  An expansion velocity of about 10600
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 3846)              Daniel W. E. Green