Electronic Telegram No. 3997
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 2014dn IN IC 2060 = PSN J04175427-5636452
     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 Sept. 24.582 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. = 4h17m54s.27, Decl. = -56d36'45".2 (equinox 2000.0; reference stars from
USNO-B and UCAC4 catalogues), which is 8" east and 14" north of the nucleus of
the galaxy IC 2060.  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 via website URL http://tinyurl.com/kgwdrjr.  The variable
was designated PSN J04175427-5636452 when it was posted at the Central
Bureau's TOCP webpage and is here designated SN 2014dn based on the
spectroscopic confirmation reported below.  The type-Ia supernova 1997ej also
appeared in IC 2060 (cf. IAUC 6801).  J. Brimacombe, Cairns, Australia, writes
that he observed 2014dn on Sept. 26.661 remotely using a 41-cm RCOS telescope
(+ U9000 camera + luminance filter) at the Warrumbungle Observatory, Siding
Spring, finding magnitude 17.2 and position end figures 54s.29, 45".3; his
image is posted at https://www.flickr.com/photos/43846774@N02/15190818060/.

     N. Morrell, C. Contreras, C. Gonzalez, and M. M. Phillips, Las Campanas
Observatory; E. Y. Hsiao, M. Stritzinger, C. Gall, and S. Holmbo, Aarhus
University; and P. Sanchez and P. Lira, Universidad de Chile -- on behalf
of the Carnegie Supernova Project -- report that an optical spectrogram (range
360-920 nm) of PSN J04175427-5636452 = SN 2014dn, obtained with the Las
Campanas du Pont telescope (+ WFCCD) on Sept. 28.3 UT, indicates that it is a
peculiar 1991bg-like type-Ia supernova.  Cross-correlation with a library of
supernova spectra using the "Supernova Identification" code (SNID; Blondin and
Tonry 2007, Ap.J. 666, 1024) shows that the spectrum of SN 2014dn is similar
to that of SN 1999by at 3 days past maximum.  The supernova redshift is
consistent with that of its presumed host galaxy, IC 2060, at z = 0.02219
(Jones et al. 2009, "The 6dF Galaxy Survey Data Release 3", via NED).


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2014 CBAT
2014 September 30                (CBET 3997)              Daniel W. E. Green