Electronic Telegram No. 3757
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 2013hj IN MCG -02-24-3 = PSN J09120629-1525460
     R. Antezana, M. Hamuy, L. Gonzalez, R. Cartier, F. Forster, and F.
Carrasco, Universidad de Chile; G. Pignata, Y. Apostolovski, E. Paillas, S.
Varela, F. Bufano, F. Olivares, and K. Takats, Universidad Andres Bello; 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 14.0) on an unfiltered image taken on
Dec. 12.30 UT with the 0.41-m 'PROMPT 4' telescope located at Cerro Tololo.
The new object is located at R.A. = 09h12m6s.29 +/- 0".2, Decl. = -15o25'46".0
+/- 0".2 (equinox 2000), which is about 6".5 west and 5".9 north of the center
of the galaxy MCG -02-24-3.  The variable was designated PSN J09120629-1525460
when it was posted at the Central Bureau's TOCP webpage and is here designated
SN 2013hj based on the spectroscopic confirmation reported below.  Additional
CHASE magnitudes for 2013hj:  Dec. 9.20, [18.0; 13.21, 13.5.

     P. Ochner, A. Pastorello, M. Turatto, S. Benetti, L. Tomasella, E.
Cappellaro, and N. Elias-Rosa, Istituto Nazionale di Astrofisica; and G.
Pignata and F. Bufano, Universidad Andres Bello, report that an optical
spectrogram (range 360-790 nm; resolution 0.8 nm) of PSN J09120629-1525460 =
SN 2013hj, obtained on Dec. 13.13 UT with the Asiago 1.22-m Galileo Telescope
(+ Boller & Chivens spectrograph), shows that it is a core-collapse supernova.
The spectrum is dominated by a featureless blue continuum.  Adopting for the
host galaxy a recession velocity of 2072 km/s (Jones et al. 2009, 6dF, vol. 1,
p. 1; via NED), a good match is found with spectra of type-IIP or type-IIb
supernovae soon after explosion.  The Asiago classification spectra are posted
at website URL http://sngroup.oapd.inaf.it; classification was made via
GELATO (Harutyunyan et al. 2008, A.Ap. 488, 383) and SNID (Blondin and Tonry
2007, Ap.J. 666, 1024).


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2013 CBAT
2013 December 17                 (CBET 3757)              Daniel W. E. Green