Electronic Telegram No. 3957
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 2014cs = PSN J21355236-6205398
     S. Parker, Canterbury, New Zealand, reports the discovery of an apparent
supernova (red mag 17.1) on a 30-s unfiltered CCD image (limiting mag 18.5)
taken by himself on June 22.538 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. = 21h35m53s.36, Decl. = -62d05'39".8 (equinox 2000.0; reference stars
from USNO-B and UCAC4 catalogues), which is 2" east and 6" north of the
nucleus of the presumed host galaxy.  Nothing is visible at this position on
Digitized Sky Survey red and infrared images (limiting red mag > 19).  An
image of the variable is viewable at website URL http://tinyurl.com/lpcvgxy.
The variable was designated PSN J21355236-6205398 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2014cs based on the
spectroscopic confirmation reported below.  J. Brimacombe, Cairns, Australia,
reports magnitude 17.7 and position end figures 52s.58, 38".3 for 2014cs from
images taken remotely on June 25.693 using a 41-cm RCOS telescope (+ U9000
camera + luminance filter); images have been posted by Brimacombe at website
URL https://www.flickr.com/photos/43846774@N02/14531335361/.

     M. Childress, R. Scalzo, F. Yuan, B. Zhang, A. Ruiter, I. Seitenzahl, and
B. Schmidt, Australian National University (ANU); and B. Tucker, ANU and
University of California at Berkeley, report that spectroscopic classification
of PSN J21355236-6205398 = SN 2014cs was obtained on July 8.63 UT via a
120-min exposure with the Wide Field Spectrograph (cf. Dopita et al. 2007, Ap.
Space Sci. 310, 255) on the ANU 2.3-m telescope at Siding Spring using the
B3000/R3000 gratings (wavelength range 350-980 nm at 0.1-nm resolution).  The
spectrum indicates that 2014cs is a type-Ia supernova a few weeks past maximum
light.  Classification with SNID (Blondin and Tonry 2007, Ap.J. 666, 1024)
shows a good match to SN 1999cc at phase +23 days, and the preferred SNID
redshift is about 0.054, consistent with the apparent host galaxy, PGC 349297
(z = 0.05366; Jones et al. 2009, 6dF Galaxy Survey Data Release 3).


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2014 CBAT
2014 September 2                 (CBET 3957)              Daniel W. E. Green