[IAUC] CBET 3644: 20130901 : SUPERNOVA 2013fc IN ESO 154-10 = PSN J02450896-5544273

Sab Ago 31 21:36:37 ART 2013

                                                  Electronic Telegram No. 3644
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)
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Prepared using the Tamkin Foundation Computer Network


SUPERNOVA 2013fc IN ESO 154-10 = PSN J02450896-5544273
     G. Pignata, Y. Apostolovski, E. Paillas, S. Varela, F. Bufano, F.
Olivares, and K. Takats, Universidad Andres Bello; M. Hamuy, R. Antezana, L.
Gonzalez, R. Cartier, F. Forster, S. Silva, F. Carrasco, and R. Ramirez,
Universidad de Chile; F. Aros, Pontificia Universidad Catolica de Chile; B.
Conuel, Wesleyan University; G. Folatelli, IPMU, University of Tokyo; and D.
E. Reichart, J. B. Haislip, J. P. Moore, and A. P. LaCluyze, University of
North Carolina at Chapel Hill, on behalf of the CHASE project (which is part
of the Millennium Center for Supernova Science collaboration), report the
discovery of an apparent supernova (mag approximately 15.4) on an unfiltered
image taken on Aug. 20.21 UT with the 0.41-m 'PROMPT 1' telescope located at
Cerro Tololo.  The new object is located at R.A. = 2h45m08s.96 +/- 0".2, Decl.
= -55o44'27".3 +/- 0".2 (equinox 2000.0), which is about 1".9 east and 0".5
south of the center of the galaxy ESO 154-10.  The variable was designated PSN
J02450896-5544273 when it was posted at the Central Bureau's TOCP webpage and
is here designated SN 2013fc based on the spectroscopic confirmation reported
below.  Additional CCD magnitudes for 2013fc:  July 2.34, [18.0 (CHASE);
Aug. 22.23, 15.4 (CHASE); 25.528, V = 15.90 and I_c = 14.75 (Seiichiro Kiyota,
Kamagaya, Japan; T30 iTelescope 0.5-m astrograph at Siding Spring; image
posted at URL http://meineko.sakura.ne.jp/ccd/PSN_J02450896-5544273.jpg);
25.626, 15.9 (Joseph Brimacombe, Cairns, Australia; 41-cm RCOS telescope +
infrared filter; position end figures 09s.00, 27".7; image posted at website
URL http://www.flickr.com/photos/43846774@N02/9595702910/).

     C. Inserra, Queen's University of Belfast (QUB); E. Kankare, T. Kangas,
and S. Mattila, University of Turku; M. Fraser, QUB; R. Scalzo, Australian
National University; M. Nicholl, QUB; A. Gal-Yam and O. Yaron, Weizmann
Institute for Science; S. Benetti and A. Pastorello, Istituto Nazionale di
Astrofisica (INAF), Padova; S. Valenti, Las Cumbres Observatory Global
Telescope and University of California at Santa Barbara; S. Taubenberger,
Max-Planck-Institut fuer Astrophysik, Garching; S. J. Smartt, K. Smith, and D.
Young, QUB; M. Sullivan, University of Southampton; and C. Knapic, M.
Molinaro, and R. Smareglia, INAF, Trieste, on behalf of the PESSTO
collaboration (see website URL http://www.astronomerstelegram.org/?read=4037),
report that an optical spectrogram (range 360-910 nm) of PSN J02450896-5544273
= SN 2013fc, obtained on Aug. 29.41 UT at the 3.6-m New Technology Telescope (+
EFOSC2) at La Silla Observatory, shows it to be a type-IIn supernova.  Adopting
a recession velocity of 5586 km/s for ESO 154-10 (Loveday et al. 1996, Ap.J.
Suppl. 107, 201; via NED), the best fits to the 2013fc spectrum found by GELATO
(Harutyunyan et al. 2008, A.Ap. 488,383; publicly available at website URL
https://gelato.tng.iac.es<https://gelato.tng.iac.es/) is with the spectrum of
the type-IIn supernova 2006gy before maximum light.  An extinction of E(B-V)
approximately 0.66 mag has been measured.


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                         (C) Copyright 2013 CBAT
2013 September 1                 (CBET 3644)              Daniel W. E. Green