[IAUC] CBET 3410: 20130209 : SUPERNOVA 2013U IN PGC 29001 = PSN J10011200+0019423

[quai en eps.harvard.edu]

                                                  Electronic Telegram No. 3410
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 2013U IN PGC 29001 = PSN J10011200+0019423
     R. Gagliano, J. Newton, and T. Puckett report the discovery of an
apparent supernova (mag 16.6) on unfiltered CCD images (limiting mag 19.0)
taken with a 0.40-m reflector at Portal, AZ, U.S.A., on Jan. 5.283 and 7.276
UT in the course of the Puckett Observatory Supernova Search.  The new object
is located at R.A. = 10h01m12s.00, Decl. = +0d19'42".3 (equinox 2000.0), which
is 2".0 east and 4".1 south of the center of PGC 29001.  Nothing is visible at
this position on images taken by Puckett on Jan. 14 (limiting mag 19.0).  An
image can be viewed at URL http://www.possdata.com/PSNJ10011200+0019423.jpg,
as posted by Puckett.  The variable was designated PSN J10011200+0019423 when
it was posted at the Central Bureau's TOCP webpage and is here designated SN
2013U based on the spectroscopic confirmation reported below.

     L. Tomasella, S. Benetti, E. Cappellaro, A. Pastorello, M. Turatto, and
P. Ochner, Osservatorio Astronomico di Padova, Istituto Nazionale di
Astrofisica; and N. Elias-Rosa and A. Morales-Garoffolo, Institut de Ciencies
de l'Espai, IEEC, Consejo Superior de Investigaciones Cientificas, Barcelona,
report that optical spectroscopy (range 340-820 nm; resolution 1.3 nm),
obtained on Feb. 6.98 UT with the Asiago 1.82-m Copernico Telescope (+ AFOSC),
shows that PSN J10011200+0019423 = SN 2013U is a peculiar type-Ia event.
Adopting for the host galaxy (PGC 29001) the redshift z = 0.03451 (SDSS 2004;
via NED), the best fit is obtained with peculiar, overluminous 1991T-like
type-Ia supernovae, a few days before maximum light.  The expansion velocity,
as deduced from the position of the Si II 635.5-nm absorption, is about 11200
km/s.  The Asiago classification spectra are posted at website URL
http://graspa.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 February 9                  (CBET 3410)              Daniel W. E. Green