[IAUC] CBET 3833: 20140321 : SUPERNOVA 2014af

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                                                  Electronic Telegram No. 3833
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 2014af
     V. Lipunov reports the discovery by D. Denisenko of an apparent supernova
(mag 15.9) on unfiltered CCD images (limiting mag 18.5) obtained on Feb. 7.692
UT with the MASTER-Kislovodsk auto-detection system (double 0.40-m f/2.5
reflector).  The new object is located at R.A. = 8h47m21s.16, Decl. =
+73d13'13".7 (equinox 2000.0).  Denisenko and E. Gorbovskoy report that
nothing was visible at this position on MASTER-Kislovodsk archival images
from 2013 Dec. 31.86 (limiting mag 19.6).  The discovery and reference images
are posted at URL http://master.sai.msu.ru/static/OT/084721.16731313.7.png.
Additional MASTER CCD magnitudes for the variable (including data from pre-
discovery MASTER images), which is here designated SN 2014af based on the
spectroscopic confirmation detailed below:  2013 Dec. 31.865, [19.6
(MASTER-Kislovodsk); 2014 Jan. 10.553, [17.8 (MASTER-Amur); 19.781, [18.4
(MASTER-Tunka); Feb. 7.756, 16.0 (MASTER-Kislovodsk); 17.443, 16.0
(MASTER-Amur); 17.475, 16.0 (MASTER-Amur).

     L. Tomasella, S. Benetti, E. Cappellaro, A. Pastorello, P. Ochner, N.
Elias-Rosa, and M. Turatto, Osservatorio Astronomico di Padova, Istituto
Nazionale di Astrofisica, report that an optical spectrogram (range 340-820
nm; resolution 1.3 nm) obtained on Mar. 9.10 UT with the Asiago 1.82-m
Copernico Telescope (+ AFOSC) shows that 2014af is a type-II supernova.  The
spectrum is characterised by strong, broad Balmer features, showing a clear
evolution from the blue and featureless continuum of a previous spectrum
taken on Feb. 17 with the Asiago 1.22-m Galileo Telescope (+ Boller & Chivens
spectrograph).  The best match of the Mar. 9 spectrum is found with the
type-IIP supernova 2012A (Tomasella et al. 2013, MNRAS 434, 1636) a few weeks
after the explosion.  The Asiago classification spectra are posted at website
URL http://graspa.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 March 21                    (CBET 3833)              Daniel W. E. Green