Electronic Telegram No. 3469
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 2013bd IN ESO 583-G5 = PSN J15425813-1823472
     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; R. H. McNaught, Australian National University; 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 Catalina Sky Survey:

 SN       2013 UT        R.A. (2000.0) Decl.      Mag.      Offset
 2013bd   Mar. 17.49   15 42 58.13  -18 23 47.2   20.2    17".4 E, 3".8 N

Nothing was visible at this position on a Mount Lemmon Survey image from
Apr. 4.46 UT (limiting mag 19.3).  The variable was designated PSN
J15425813-1823472 when it was posted at the Central Bureau's TOCP webpage
and is here designated SN 2013bd based on the spectroscopic confirmation
reported below.

     E. Y. Hsiao and N. Morrell, Las Campanas Observatory; F. Forster,
Universidad de Chile; and G. H. Marion, Harvard-Smithsonian Center for
Astrophysics, report that a near-infrared spectrogram (range 800-2400 nm) of
PSN J15425813-1823472 = SN 2013bd was obtained on Apr. 3.35 UT with the
FoldedPort Infrared Echellette (FIRE) spectrograph on the 6.5-m Magellan
Baade Telescope.  The spectrum indicates that 2013bd is a type-IIb supernova
past maximum light.  The near-infrared spectrum is similar to that of SN
2011dh at 12 days past maximum (Marion et al. 2013, poasted at website URL
http://lanl.arxiv.org/abs/1303.5482).  The supernova redshift approximately
matches the redshift of the presumed host galaxy (ESO 583-G5) at z = 0.034.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2013 CBAT
2013 April 13                    (CBET 3469)              Daniel W. E. Green