[IAUC] CBET 3284: 20121101 : SUPERNOVA 2012fy = PSN J19371572-4218271

Jue Nov 1 09:04:30 ART 2012

                                                  Electronic Telegram No. 3284
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 2012fy = PSN J19371572-4218271
     F. Carrasco, R. Ramirez, J. Maza, M. Hamuy, R. Antezana, L. Gonzalez,
R. Cartier, F. Forster, S. Silva, P. Sanchez, and C. Hervias, Universidad de
Chile; G. Pignata, M. Cifuentes, and Y. Apostolovski, Universidad Andres
Bello; F. Aros, Pontificia Universidad Catolica de Chile; B. Conuel, Wesleyan
University; G. Folatelli, IPMU, University of Tokyo; and D. Reichart, K.
Ivarsen, J. Haislip, A. Crain, D. Foster, M. Nysewander, and A. 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 17.2) on an
unfiltered image taken on Aug. 12.07 UT with the 0.41-m 'PROMPT 5' telescope
located at Cerro Tololo.  Thew new object is located at R.A. = 19h37m15s.72
+/- 0".2, Decl. = -42o18'27".1 +/- 0".2 (equinox 2000.0), which is about
12".7 east and 19".0 north of center of the presumed host galaxy.  Nothing
is visible at this position in a stack of fifteen 40-s archival images taken
between 2011 July 14 and 18 (limiting mag 20.5).  The variable was designated
PSN J19371572-4218271 when it was posted at the Central Bureau's TOCP webpage
and is here designated SN 2012fy based on the spectroscopic confirmation
reported below.  Additional CCD magnitudes for 2012fy:  July 18.10, [18.0
(CHASE); Aug. 13.05, 17.0 (CHASE); Aug. 17.466, 17.7 (Joseph Brimacombe,
Cairns, Australia; infrared filter; wavelength > 700 nm; position end figures
15s.70, 27".5; image posted at the following website URL:
http://www.flickr.com/photos/43846774@N02/7805169858/).

     C. Inserra, S. J. Smartt, M. Fraser, D. Young, and K. Smith, Queen's
University, Belfast; F. Cellier-Holzem and P. El-Hage, Laboratoire de Physique
Nucleaire et de Hautes Energies, Paris; Y.-C. Pan, University of Oxford; M.
Sullivan, University of Southampton; I. Arcavi, A. Gal-Yam, and O. Yaron,
Wiezmann Institute of Science; S. Benetti, A. Pastorello, and S. Valenti,
Istituto Nazionale di Astrofisica, Padova; and S. Taubenberger, A. Sternberg,
and S. Benitez-Herrera, Max-Planck-Institute fuer Astrophysik, Garching, on
behalf of the PESSTO collaboration (see Valenti et al., posted at website URL
http://www.astronomerstelegram.org/?read=4037), report that optical
spectroscopy (range 360-910 nm), obtained on Aug. 18 with the New Technology
Telescope (+ EFOSC2), show that PSN J19371572-4218271 = SN 2012fy is a
type-IIP supernova at redshift z = 0.020; the best fit is to the spectrum of
SN 1999em at +10 to +12 days.  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
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                         (C) Copyright 2012 CBAT
2012 November 1                  (CBET 3284)              Daniel W. E. Green