Electronic Telegram No. 3687
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 2013fy IN ESO 287-G40 = PSN J21372712-4701548
     Stuart Parker, Canterbury, New Zealand, reports the discovery of an
apparent supernova (red mag 16.5) on a 30-s unfiltered CCD image (limiting mag
18.0) taken on Oct. 25.411 UT with a 35-cm Celestron C14 f/6.3 reflector (+
ST10 camera) at his Parkdale Observatory in the course of the Backyard
Observatory Supernova Search.  The new object is located at R.A. =
21h37m27S.12, DecL. = -47d01'54".8 (equinox 2000.0; reference stars from
USNO-B and UCAC4 catalogues), which is 11" west and 14" north of the nucleus
of the galaxy ESO 287-G40.  Nothing is visible at this position on Digitized
Sky Survey red and infrared images (limiting red magnitude > 19) or in an
image taken on 2013 Sept. 15.581 by Parker.  The variable was designated PSN
J21372712-4701548 when it was posted at the Central Bureau's TOCP webpage
and is here designated SN 2013fy based on the spectroscopicconfirmation
reported below.  Additional CCD magnitudes for 2013fy:  Oct. 26.396, 16.5
(Parker); 27.399, 17.8 (J. Brimacombe, Cairns, Australia; 41-cm telescope +
infrared filter; bandpass > 700 nm; position end figures 27s.14, 56".0; image
posted at website URL http://www.flickr.com/photos/43846774@N02/10542814173/);
28.419, R = 15.5 (P. Miller, P. Roche, A. Tripp, R. Miles, R. Holmes, S.
Foglia, L. Buzzi, T. Vorobjov, and T. Lister; 2.0-m f/10 "Faulkes Telescope
South" + Bessell R filter at Siding Spring; position end figures 27s.12, 55".8;
image posted at URL http://www.astrogeo.va.it/pub/TOCP/PSN_E287-G40.jpg);
30.606, 17.9 (Brimacombe; position end figures 27s.13, 55".7; image posted at
URL http://www.flickr.com/photos/43846774@N02/10586728653/).

     N. Elias-Rosa, Istituto Nazionale di Astrofisica, Padova Astronomical
Observatory and Institut de Ciencies de l'Espai, IEEC, Consejo Superior de
Investigaciones Cientificas, Barcelona; S. Spiro, M. Turatto, S. Benetti, E.
Cappellaro, and A. Pastorello, Istituto Nazionale di Astrofisica, Padova
Astronomical Observatory; M. Fraser, University of Cambridge; K. Maguire,
European Southern 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. 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" collaboration (PESSTO; see Valenti et al., as posted at website URL
http://www.astronomerstelegram.org/?read=4037), report that optical
spectroscopy of PSN J21372712-4701548 = SN 2013fy, obtained on Oct. 27.02 UT
with the New Technology Telescope (+ EFOSC2; spectral range 360-910 nm), show
that it is a type-Ia supernova at redshift z = 0.03, around one week before
maximum light.  PESSTO classification spectra can be obtained from website URL
http://www.pessto.org/(via WISeREP); 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 3                  (CBET 3687)              Daniel W. E. Green