[IAUC] CBET 3993: 20140929 : SUPERNOVA 2014dj IN NGC 317B = PSN J00574018+4347342

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                                                  Electronic Telegram No. 3993
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 2014dj IN NGC 317B = PSN J00574018+4347342
     D. Rich, Hampden, ME, U.S.A, reports his discovery of an apparent
supernova (mag about 17.0) on unfiltered CCD frames (limiting mag 19.3) taken
with a 0.41-m reflector on Sept. 24.150 and 25.109 UT in the course of the
Eagle Hill Supernova Search Project.  The new object is located at R.A. =
0h57m40s.18, Decl. = +43o47'35".1 (equinox 2000.0), which is about 2".4 west
and 3".1 north of the center of NGC 317B.  Nothing is visible at this
position on Palomar Digitized Sky Survey images from 1989 Oct. 5 (limiting
red mag about 20.3) and 1989 Aug. 31 (limiting blue mag about 21.2).  The
variable was designated PSN J00574018+4347342 when it was posted at the
Central Bureau's TOCP webpage (based on an earlier measurement for the
declination by Rich) and is here designated SN 2014dj based on the
spectroscopic confirmation reported below.  The type-II supernova 1999gl also
appeared in NGC 317B (cf. IAUC 7333).  Additional unfiltered CCD magnitudes
for 2014dj:  Sept. 4.235, [19.1 (Rich); 25.892, 17.7 (G. Masi and P. Catalano;
remotely using a 43-cm telescope at Ceccano, Italy; position end figures
40s.15, 34".9).

     L. Tomasella, N. Elias-Rosa, P. Ochner, L. Tartaglia, S. Benetti, E.
Cappellaro, A. Pastorello, and M. Turatto, Osservatorio Astronomico di Padova,
Istituto Nazionale di Astrofisica, report that optical spectroscopy (range
340-820 nm; resolution 1.3 nm), obtained on Sept. 26.88 UT with the Asiago
1.82-m Copernico Telescope (+ AFOSC) under the Asiago Transient Classification
Program (Tomasella et al. 2014, A.N. 335, 841), shows that PSN
J00574018+4347342 = SN 2014dj is a type-Ic supernova.  Assuming for the host
galaxy (NGC 317B) a recessional velocity of 5429 km/s (Strauss et al. 1992,
Ap.J. Suppl. 83, 29; via NED), a good match is found with the type-Ic
supernova 2007gr (Valenti et al. 2008, Ap.J. 673, L155).  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 September 29                (CBET 3993)              Daniel W. E. Green