[IAUC] CBET 3935: 20140822 : SUPERNOVA 2014ca = PSN J16532094-7230520

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                                                  Electronic Telegram No. 3935
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 2014ca = PSN J16532094-7230520
     S. Parker, Canterbury, New Zealand, reports the discovery of an apparent
supernova (red mag 17.3) on a 30-s unfiltered CCD image (limiting mag 19)
taken on May 10.514 UT with a 35-cm Celestron C14 reflector (+ ST10 camera) at
his Parkdale Observatory in the course of the Backyard Observatory Supernova
Search.  The new object is located at R.A. = 16h53m20s.94, Decl. =
-72d30'52".0 (equinox 2000.0; reference stars from USNO-B and UCAC4
catalogues), which is 4" west and 1" south of the nucleus of a galaxy near NGC
6209.  Nothing is visible at this position on Digitized Sky Survey red and
infrared images (limiting red magnitude > 19).  An image of the variable can
be viewed via website URL http://tinyurl.com/p9ym3ly.  The variable was
designated PSN J16532094-7230520 when it was posted at the Central Bureau's
TOCP webpage and is here designated SN 2014ca based on the spectroscopic
confirmation reported below.  J. Brimacombe, Cairns, Australia, obtained
images remotely of 2014ca on June 6.722 using a 41-cm RCOS telescope (+
luminance filter) at the Warrumbungle Observatory, Siding Spring, yielding
mag 17.4 and position end figures 20s.87, 51".8; his images are posted at
website URL https://www.flickr.com/photos/43846774@N02/14369075282/.

     M. Childress, C. Owen, R. Scalzo, F. Yuan, and B. Schmidt, Australian
National University (ANU); and B. Tucker, ANU and University of California at
Berkeley, report on spectroscopic classification of PSN J16532094-7230520 = SN
2014ca via a 40-min spectrogram obtained on June 11.43 UT 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 2014ca
is a type-II supernova about two months past maximum light.  Classification
with SNID (Blondin and Tonry 2007, Ap.J. 666, 1024) shows a good match to SN
2006bp at phase +65 days, and the preferred SNID redshift is about 0.021,
consistent with the apparent host galaxy (z = 0.0195; Jones et al. 2009, 6dF
Galaxy Survey Data Release 3).


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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                         (C) Copyright 2014 CBAT
2014 August 22                   (CBET 3935)              Daniel W. E. Green