[IAUC] CBET 3963: 20140905 : SUPERNOVA 2014cx IN NGC 337 = PSN J00594783-0734186

Jue Sep 4 20:21:19 ART 2014

                                                  Electronic Telegram No. 3963
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 2014cx IN NGC 337 = PSN J00594783-0734186
     S. Nakano, Sumoto, Japan, reports the discovery by K. Itagaki (Teppo-cho,
Yamagata, Japan) of an apparent supernova (mag 15.6) on an unfiltered CCD
frame (limiting mag 19.0) taken on Sept. 2.572 UT using a 0.50-m f/6
reflector.  The new object is located at R.A. = 0h59m47s.83, Decl. =
-7d34'18".6 (equinox 2000.0; UCAC4 reference stars), which is 32".3 west and
20".2 north of the nucleus of the galaxy NGC 337.  Itagaki has posted the
discovery image at website URL http://www.k-itagaki.jp/images/ngc337.jpg.  The
variable was designated PSN J00594783-0734186 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2014cx based on the
spectroscopic confirmation reported below.  Additional CCD magnitudes for
2014cx:  2006 Aug. 26.72, [19.5 (Itagaki); 3.040, 15.2 (T. Yusa, Osaki, Japan;
remotely using an iTelescope 0.43-m f/6.8 astrograph near Nerpio, Spain;
position end figures 47s.87, 19".1; limiting mag 18.0; image posted at website
URL http://space.geocities.jp/yusastar77/supernova/PSNin337_140903.htm);
3.084, V = 15.29 +/- 0.04 (S. Howerton; remotely with an iTelescope 0.43-m
telescope at the AstroCamp Observatory, Nerpio, Spain; image posted at website
URL https://www.flickr.com/photos/watchingthesky/14937399929).  The position
of 2014cx is within a couple of arcseconds of that of the type-II supernova
2011dq (cf. CBET 2749).

     N. Elias-Rosa, L. Tartaglia, E. Cappellaro, and A. Pastorello,
Osservatorio Astronomico di Padova, INAF; M. T. Botticella, Osservatorio
Astronomico di Capodimonte, INAF; C. Inserra, Queen's University, Belfast; K.
Maguire, European Southern Observatory; S. Smartt and K. W. Smith, Queen's
University, Belfast; M. Sullivan, Southampton University; S. Valenti, Las
Cumbres Observatory Global Telescope; O. Yaron, Weizmann Institute for
Science; D. Young, Queen's University, Belfast; and I. Manulis, Weizmann
Institute for Science report that an optical spectrogram (range 398.5-931.5
nm; 1.8-nm resolution) of PSN J00594783-0734186 = SN 2014cx was obtained on
Sept. 3.33 UT with the European Southern Observatory's New Technology
Telescope (using EFOSC2 and Grism 13) at La Silla under the Public ESO
Spectroscopic Survey for Transient Objects.  Adopting for the host galaxy
(NGC 337) a recession velocity of 1550 km/s, as derived from the narrow
emission of the underlying H II region, a good match is found with type-II
supernovae shortly after explosion.  An expansion velocity of about 15000
km/s is derived from the minimum of the broad H I 656-nm line.
Classification was done with SNID (Blondin and Tonry 2007, Ap.J. 666, 1024)
and GELATO (Harutyunyan et al. 2008, A.Ap. 488, 383).  Classification spectra
can be obtained at website URL http://www.pessto.org (via WISeREP).


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

                         (C) Copyright 2014 CBAT
2014 September 5                 (CBET 3963)              Daniel W. E. Green