[IAUC] CBET 3761: 20131219 : SUPERNOVA 2013?? IN IC 4329 = PSN J13485917-3017265

[quai en eps.harvard.edu]

                                                  Electronic Telegram No. 3761
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 2013?? IN IC 4329 = PSN J13485917-3017265
     Ella Sanders Kot and R. Kot, Truth or Consequences, NM, U.S.A.; and D.
Coffin, University of Iowa, report the discovery of an apparent supernova
(mag 15.2) on a 180-s unfiltered CCD image taken with the 0.37-m f/14 Rigel
telescope at the Iowa Robotic Observatory near Sonoita, AZ, U.S.A., on Dec.
13.544 UT.  The new object is located at R.A. = 13h48m59s.17, Decl. =
-30o17'26".5 (equinox 2000.0), which is 92" west and 18".4 north of the
nucleus of IC 4329.  E. S. Kot adds that a follow-up image taken on Dec.
16.53 shows the variable at mag 14.8 (with position end figures measured as
59s.19, 26".9).  The variable was designated PSN J13485917-3017265 when it
was posted at the Central Bureau's TOCP webpage and is here designated SN
2013?? based on the spectroscopic confirmation reported below.

     D. Sand, Texas Tech University; and S. Valenti, D. A. Howell, J. Parrent,
and I. Arcavi, Las Cumbres Observatory Global Telescope and University of
California at Santa Barbara, report that a spectrogram of PSN J13485917-3017265
= SN 2013?? was obtained with FLOYDS (wavelength range 320-1000 nm) on the
"Faulkes Telescope South" on Dec. 17.72 UT.  The spectrum reveals 2013?? to be
a type-Ia supernova around five days before maximum light, with a Si 615.0-nm
absorption minimum at a velocity of about 12000 km/s.  The redshift of the
supernova is consistent with that of the host galaxy, IC 4329 (z = 0.01514;
Smith et al. 2000, MNRAS 313, 469).  Classification was performed via
supernova-spectrum cross-correlation using 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      superseded by text appearing later in the printed IAU Circulars.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 19                 (CBET 3761)              Daniel W. E. Green