Electronic Telegram No. 3953
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 2014co IN NGC 418 = PSN J01103622-3013376
     L. A. G. Monard, Calitzdorp, Western Cape, South Africa, reports his
discovery of an apparent supernova (mag 16.8) on several unfiltered CCD images
taken with a 35-cm RCX400 telescope (+ SBIG ST8-XME camera) on June 21.185 UT
at his Klein Karoo Observatory.  The new object is located at R.A. =
1h10m36s.22, Decl. = -30d13'37".6 (equinox 2000.0), which is 9" east and 21"
south of the center of the type-SBc galaxy NGC 418.  The variable was
designated PSN J01103622-3013376 when it was posted at the Central Bureau's
TOCP webpage and is here designated SN 2014co based on the spectroscopic
confirmation reported below.  Additional CCD magnitudes for 2014co:  June
12.172, [18.8 (Monard); 22.170, 16.7 (Monard); 25.827, 17.2 (J. Brimacombe,
Cairns, Australia; remotely using a 41-cm RCOS telescope at the Warrumbungle
Observatory, Siding Spring; position end figures 36s.29, 37".6; image posted
at website URL https://www.flickr.com/photos/43846774@N02/14538402123/);
26.76, 17.0 (Brimacombe; position end figures 36s.30, 38".0).

     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 J01103622-3013376 = SN 2014co was obtained on July 8.63 UT via a 60-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 SN 2014co is a type-II supernova about a week past
maximum light.  Classification with SNID (Blondin and Tonry 2007, Ap.J. 666,
1024) shows a good match to SN 2004et at phase +10 days, and the preferred
SNID redshift is about 0.016, consistent with the apparent host galaxy, NGC
418 (z = 0.01904; via the HIPASS catalogue).


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2014 CBAT
2014 September 1                 (CBET 3953)              Daniel W. E. Green