Electronic Telegram No. 3692
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 2013fz IN NGC 1578 = PSN J04234644-5135463
     Stuart Parker, Canterbury, New Zealand, reports the discovery of an
apparent supernova (red mag 15.1) on a 30-s unfiltered CCD image (limiting mag
18.0) taken on Nov. 2.533 UT with a 35-cm Celestron C14 reflector (+ ST10
camera) at his Parkdale Observatory in the course of the Backyard Observatory
Supernova Search.  The new object is located at R.A. = 4h23m46s.44, Decl. =
-51d35'46".3 (equinox 2000.0; reference stars from USNO-B and UCAC4
catalogues), which is 2" west and 12" north of the nucleus of the galaxy NGC
1578.  Nothing is visible at this position on Digitized Sky Survey red and
infrared images (limiting red magnitude > 19) or in an image taken by Parker
on Oct. 9.567 with the same equipment.  The variable was designated PSN
J04234644-5135463 when it was posted at the Central Bureau's TOCP webpage and
is here designated SN 2013fz based on the spectroscopic confirmation reported
below.  Additional infrared CCD magnitudes (bandpass > 700 nm) for 2013fz
reported by Joseph Brimacombe (Cairns, Australia), obtained with a 41-cm RCOS
telescope (+ STL6K camera):  Nov. 3.740, 16.1 (position end figures 46s.47,
46".3; image posted at http://www.flickr.com/photos/43846774@N02/10656694284/);
4.673, 16.4 (position end figures 46s.48, 46".4; image posted at website URL
http://www.flickr.com/photos/43846774@N02/10701577275/).

     M. Turatto, S. Benetti, E. Cappellaro, A. Pastorello, Istituto Nazionale
di Astrofisica, Padova Astronomical Observatory; N. Elias-Rosa, Istituto
Nazionale di Astrofisica, Padova Astronomical Observatory and Institut de
Ciencies de l'Espai, IEEC, Consejo Superior de Investigaciones Cientificas,
Barcelona; A. De Cia, Weizmann Institute of Science; M. T. Botticella,
Istituto Nazionale di Astrofisica, Capodimonte Astronomical Observatory; S.
Valenti, University of California at Santa Barbara and Las Cumbres Observatory
Global Telescope; S. Taubenberger, Max-Planck-Institut fuer Astrophysik,
Garching; S. J. Smartt, K. Smith, D. Young, and C. Inserra, Queen's University,
Belfast; M. Fraser, University of Cambridge; M. Sullivan, University of
Southampton; and A. Gal-Yam, O. Yaron, and I. Manulis, Weizmann Institute for
Science, on behalf of the Public ESO Spectroscopic Survey for Transient
Objects (PESSTO) collaboration (see Valenti et al., posted at website URL
http://www.astronomerstelegram.org/?read=4037), report that optical
spectroscopy of PSN J04234644-5135463 = SN 2013fz, obtained on Nov. 4.33 UT
with the New Technology Telescope (+ EFOSC2; spectral range 360-910 nm),
shows that it is a type-Ia supernova at redshift z = 0.02, around maximum
light.  PESSTO classification spectra can be obtained from website URL
http://www.pessto.org/; classification is made via SNID (Blondin and Tonry
2007, Ap.J. 666, 1024) and GELATO (Harutyunyan et al. 2008, A.Ap. 488, 383).


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

                         (C) Copyright 2013 CBAT
2013 November 8                  (CBET 3692)              Daniel W. E. Green