Electronic Telegram No. 3996
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 2014dm IN NGC 1516A = PSN J04080713-0849372
     S. Nakano, Sumoto, Japan, reports the discovery by K. Itagaki (Teppo-cho,
Yamagata) of an apparent supernova (mag 16.5) on an unfiltered CCD frame
(limiting magnitude 19.5) taken on Sept. 27.697 UT using a 0.60-m f/5.7
reflector.  The new object is located at R.A. = 4h08m07s.13, Decl. =
-8d49'37".2 (equinox 2000.0; reference stars from UCAC4 catalogue), which is
located at 4".9 west and 7".9 north of the nucleus of the galaxy NGC 1516A
(position end figures 07s.46, 45".1).  Itagaki's discovery image has been
posted at website URL http://www.k-itagaki.jp/images/1516A.jpg.  The variable
was designated PSN J04080713-0849372 when it was posted at the Central
Bureau's TOCP webpage and is here designated SN 2014dm based on the
spectroscopic confirmation reported below.  Additional CCD magnitudes for
2014dm:  2008 Sept. 5.781, [19.5 (Itagaki); 2014 Sept. 8.784, [17.0 (Itagaki);
28.580, V = 16.55 (S. Kiyota, Kamagaya, Japan; remotely with a 0.7-m f/6.6
astrograph and a 0.5-m f/6.8 astrograph at Siding Spring; image posted at
website URL http://meineko.sakura.ne.jp/ccd/PSN_J04080713-0849372.jpg);
28.586, 16.8 (T. Noguchi, Katori, Chiba-ken, Japan; 0.23-m f/6.3 Schmidt-
Cassegrain reflector; position end figures 07s.12, 36".9; image posted at URL
http://park8.wakwak.com/~ngc/images/PSNinNGC1516A.jpg; communicated by
Nakano); 29.076, 16.5 (G. Masi and P. Catalano; remotely using a 43-cm
telescope at Ceccano, Italy; position end figures 07s.12, 36".7).

     I. Shivvers and A. V. Filippenko, University of California, Berkeley,
report on CCD spectroscopy (range 330-1000 nm) obtained on Sept. 28 UT with
the 3-m Shane reflector (+ Kast) at Lick Observatory.  PSN J04080713-0849372 =
SN 2014dm is a type-Ia supernova near maximum brightness (z = 0.033), found
through cross-correlation with a library of supernova spectra using the
"SuperNova IDentification" code (SNID; Blondin and Tonry 2007, Ap.J. 666,
1024), and the measured recession velocity was confirmed to be consistent
with the host-galaxy velocity using the NASA/IPAC Extragalactic Database (cf.
website URL http://ned.ipac.caltech.edu/).


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2014 CBAT
2014 September 30                (CBET 3996)              Daniel W. E. Green