Electronic Telegram No. 3385
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 2013H IN ESO 36-G19 = PSN J09063070-7549015
     Stuart Parker, Canterbury, New Zealand, reports the discovery of an
apparent supernova (red mag 16.5) on a 30-s unfiltered CCD image (limiting mag
18.5) taken by himself on Jan. 6.565 UT with a 30-cm Astro-Tech AT12RC
Ritchey-Chretien astrograph (+ ST10 camera) at his Parkdale Observatory in the
course of the Backyard Observatory Supernova Search.  The new object is
located at R.A. = 9h06m30s.70, Decl. = -75d49'01".5 (equinox 2000.0; reference
stars from USNO-B and UCAC3 catalogues), which is 18" west and 34" north of
the nucleus of the galaxy ESO 36-G19.  Nothing is visible at this position on
Digitized Sky Survey red and infrared images (limiting red magnitude > 19).
Parker's image can be viewed via website URL http://tinyurl.com/b2h5rj2.  The
variable was designated PSN J09063070-7549015 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2013H based on the
spectroscopic confirmation reported below.

     N. Morrell, E. Y. Hsiao, M. M. Phillips, and C. Contreras, Las Campanas
Observatory; K. Krisciunas, Texas A&M University; and J. L. Prieto, Princeton
University, report that an optical spectrogram (range 359-960 nm) of PSN
J09063070-7549015 = SN 2013H, obtained on Jan. 7.17 UT with the Las Campanas
2.5-m du Pont telescope (+ WFCCD), shows that it is a type-Ia supernova,
approximately a week before maximum brightness.  Cross-correlation with a
library of supernova spectra via the Supernova Identification tool (Blondin
and Tonry 2007, Ap.J. 1024, 666) yields very good matches with many normal
type-Ia supernovae at 6-11 days prior to maximum.  An expansion velocity of
approximately 15200 km/s is inferred from the minimum of the Si II 635.5-nm
absorption, using the redshift of 0.015487 for the assumed host galaxy, ESO
36-G19 (H I Parkes All Sky Survey Final Catalogue; via NED).


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2013 CBAT
2013 January 19                  (CBET 3385)              Daniel W. E. Green