Electronic Telegram No. 4048
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 2014dx IN PGC 23837 = PSN J08293820-1717473
     S. Parker, Canterbury, New Zealand, reports the discovery of an apparent
supernova (red mag 16.4) on a 30-s unfiltered CCD image (limiting mag 18.5)
taken by himself on 2014 Dec. 25.541 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. = 8h29m38s.20, Decl. = -17d17'47".3 (equinox 2000.0; reference
stars from USNO-B and UCAC4 catalogues), which is 2" west and 5" north of the
nucleus of the galaxy PGC 23837 = MCG -03-22-2.  Nothing is visible at this
position on Digitized Sky Survey red and infrared images (limiting red mag
19).  An image of the new object was posted by Parker via website URL
http://tinyurl.com/m4argwn.  The variable was designated PSN J08293820-1717473
when it was posted at the Central Bureau's TOCP webpage and is here designated
SN 2014dx based on the spectroscopic confirmation reported below.

     M. Stritzinger and E. Hsiao, Aarhus University; N. Morrell, Las Campanas
Observatory; and F. Taddia, Stockholm University, on the behalf of the
Carnegie Supernova Project, report the spectroscopic classification of PSN
J08293820-1717473 = SN 2014dx.  Based on a visual-wavelength spectrum obtained
on 2014 Dec. 27.1 UT with the Nordic Optical Telescope (+ Alfosc), the
transient is found to be a type-Ia supernova at 2-3 weeks past maximum light.
The spectrum exhibits prevalent host Na I D absorption with an equivalent
width of roughly 0.4 nm.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2015 CBAT
2015 January 22                  (CBET 4048)              Daniel W. E. Green