[IAUC] CBET 3748: 20131211 : SUPERNOVA 2013hd IN UGC 2895 = PSN J03542140+1735048

Mar Dic 10 21:43:04 ART 2013

                                                  Electronic Telegram No. 3748
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 2013hd IN UGC 2895 = PSN J03542140+1735048
     S. Howerton, Arkansas City, KS, U.S.A.; A. J. Drake, S. G. Djorgovski,
A. Mahabal, M. J. Graham, and R. Williams, California Institute of Technology;
J. L. Prieto, Princeton University; M. Catelan, Pontificia Universidad
Catolica de Chile; and E. Christensen and S. M. Larson, Lunar and Planetary
Laboratory, University of Arizona, report the Catalina Real-time Transient
Survey discovery of an apparent supernova in public images from the Mount
Lemmon Survey (MLS).

 SN       2013 UT       R.A. (2000.0) Decl.      Mag.      Offset
 2013hd   Dec. 2.25    3 54 21.40  +17 35 04.8   19.5    33".3 E, 1".2 S

The variable was designated PSN J03542140+1735048 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2013hd based on the
spectroscopic confirmation reported below.  Additional CCD magnitudes for
2013hd:  Nov. 11.39 UT, [20.5 (MLS); Dec. 3.918, 19.6 (Gianluca Masi,
Francesca Nocentini, and Patrick Schmeer; remotely using a 43-cm telescope
near Ceccano, Italy; position end figures 21s.50, 02".9).

     L. Tartaglia, L. Tomasella, S. Benetti, P. Ochner, A. Pastorello, E.
Cappellaro, M. Turatto, and N. Elias-Rosa, Osservatorio Astronomico di Padova,
Istituto Nazionale di Astrofisica, report that an optical spectrogram (range
340-820 nm; resolution 1.3 nm) of PSN J03542140+1735048 = SN 2013hd, obtained
on Dec. 7.89 UT with the Asiago 1.82-m Copernico Telescope (+ AFOSC), shows it
to be an obscured (A_V around 1.5) type-Ib/c supernova.  Adopting for the host
galaxy (UGC 2895) a redshift z = 0.03368 (Giovanelli and Haynes 1993, A.J.
105, 1271; via NED), a good match is found with SN 2008D (Mazzali et al. 2008,
Science 321, 185) and other type-Ib/c supernovae near maximum light.  The
Asiago classification spectra are posted at 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 11                 (CBET 3748)              Daniel W. E. Green