Electronic Telegram No. 3696

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 2013ga IN UGC 11895 = PSN J22042153+3944340

     D. Rich, T. Harvey, M. Marion, J. Rosebush, and C. Sawyer report their
discovery of an apparent supernova (mag about 15.3) on unfiltered CCD frames
(limiting mag 19.1) taken with a 0.41-m reflector on Oct. 19.150 and 2.980 UT
in Hampden, ME, U.S.A, in the course of the Eagle Hill Supernova Search
Project.  The new object is located at R.A. = 22h04m21s.53, Decl. =
+39o44'28".5 (equinox 2000.0), which is about 10".3 west and 3".5 south of
the center of UGC 11895.  Nothing is visible at this position on a CCD frame
taken by Rich on Sept. 19.110 (limiting mag about 19.0) or on Palomar Digital
Sky Survey images from 1989 Sept. 4 (limiting red mag about 20.3) and 1992
Sept. 29 (limiting blue mag about 21.0).  The variable was designated PSN
J22042153+3944340 when it was posted at the Central Bureau's TOCP webpage and
is here designated SN 2013ga based on the spectroscopic confirmation reported
below.  Additional CCD magnitudes for 2013ga:  Oct. 22.170, V = 15.7, R = 15.9,
B = 15.1, I = 16.3 (J. Brimacombe, Cairns, Australia; remotely using a a 51-cm
RCOS telescope at the New Mexico Skies observatory near Mayhill, NM, USA; also
unfiltered mag 16.1; position end figures 21s.55, 34".5; image posted at URL
http://www.flickr.com/photos/43846774@N02/10439187785/); 31.916, 15.7 (X. Bros,
Ager, Spain; 35-cm reflector; position end figures 21s.63, 33".0; UCAC2
reference stars; image posted at URL http://anysllum.com/PSN_UGC11895.jpg);
Nov. 6.901, V = 16.1 (Massimiliano Martignoni, Magnago, Italy, 25-cm f/10
Schmidt-Cassegrain reflector; position end figures 21s.53, 33".0).

     David Sand, Texas Tech University; Stefano Valenti, Iair Arcavi, and D.
A. Howell, Las Cumbres Observatory Global Telescope (LCOGT) and University of
California at Santa Barbara; J. T. Parrent, LCOGT and Dartmouth College; and
and D. Rich, Hampden, ME, U.S.A., report that a spectrogram of PSN
J22042153+3944340 = SN 2013ga was obtained with FLOYDS (wavelength range
320-1000 nm) on the "Faulkes Telescope North" on Oct. 21.25 UT.  The spectrum
reveals 2013ga to be a type-Ia supernova at or before maximum light.  The
redshift of the supernova is consistent with that of the host galaxy, UGC
11895 (z = 0.0156, from Huchra et al. 1999, Ap.J. Suppl. 121, 287).
Classification was performed via supernova-spectrum cross-correlation using
the SNID software (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 November 10                 (CBET 3696)              Daniel W. E. Green