[IAUC] CBET 3976: 20140918 : SUPERNOVA 2014de = PSN J03083174+1425303

[quai en eps.harvard.edu]

                                                  Electronic Telegram No. 3976
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 2014de = PSN J03083174+1425303
     V. Lipunov reports the discovery by V. Shumkov of an apparent supernova
(mag 17.2) on unfiltered survey images (180-s exposures, limiting mag 19.9)
obtained with the MASTER-Kislovodsk robotic 0.40-m reflector on Aug. 28.00 UT.
The new object is located at R.A. = 3h08m31s.74, Decl. = +14o25'30".3 (equinox
2000.0), which is 1" east and 7" south of the center of the galaxy PGC 1457807.
D. Denisenko and E. Gorbovskoy report that nothing but galaxy background is
present at this position on the images taken with the same telescope on 2011
Jan. 11.682 UT (limiting mag 22.1).  The discovery and reference images are
available at URL http://master.sai.msu.ru/static/OT/030831.74142530.3.png.
The variable was designated PSN J03083174+1425303 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2014de based on the
spectroscopic confirmation reported below.  J. Brimacombe, Cairns, Australia,
reports mag 18.2 and position end figures 31s.97, 30".1 for 2014de from
images obtained remotely on Sept. 2.704 using a 43-cm CDK telescope at the
Savahhah Skies Observatory in northern Queensland, Australia (images posted
at website URL https://www.flickr.com/photos/43846774@N02/15015072080/).

     S. T. Hodgkin, A. Hall, M. Fraser, and H. Campbell, University of
Cambridge; L. Wyrzykowski and Z. Kostrzewa-Rutkowska, Warsaw Observatory; and
N. Pietro, Isaac Newton Group, Warwick University, report that a spectrogram
(range 350-800 nm; resolution about 0.6 nm) of PSN J03083174+1425303 = SN
2014de was obtained with the 2.5-m Isaac Newton Telescope (+ Intermediate
Dispersion Spectrograph + R300V grating) at La Palma on Sept. 4.25 UT.  The
spectrum was compared to a set of templates using SNID (Blondin and Tonry
2007, Ap.J. 666, 1024), and a good match was found to a type-Ia supernova
around ten days after maximum light, at a redshift of z = 0.05.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2014 CBAT
2014 September 18                (CBET 3976)              Daniel W. E. Green