[IAUC] CBET 3872: 20140517 : SUPERNOVA 2014az IN NGC 7691 = PSN J23322284+1551106

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                                                  Electronic Telegram No. 3872
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 2014az IN NGC 7691 = PSN J23322284+1551106
     Stuart Parker, Canterbury, New Zealand, reports the discovery of an
apparent supernova (red mag 16.3) on a 30-s unfiltered CCD image (limiting mag
18) taken by Parker on Apr. 30.750 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. = 23h32m22s.84, Decl. = +15d51'10".6 (equinox 2000.0; reference stars
from USNO-B and UCAC4 catalogues), which is 22" west and 18" north of the
nucleus of the galaxy NGC 7691.  Nothing is visible at this position on
Digitized Sky Survey red and infrared images (limiting red magnitude > 19).
An image of the variable was posted at website URL http://tinyurl.com/qjx6rqq.
The variable was designated PSN J23322284+1551106 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2014az based on the
spectroscopic confirmation reported below.  T. Yusa reports that an unfiltered
CCD frame taken by K. Shima with a 0.45-m f/4.5 reflector (+ FLI ML-8200
camera) at the Goto Astronomical Observatory at Yatsugatake, Japan, on May
3.776 shows 2014az at mag 16.1 with position end figures 22s.78, 09".4.

     N. Morrell, E. Hsiao, and M. Phillips, on behalf of the Carnegie
Supernova Project, report that an optical spectrogram (range 360-920 nm) of
PSN J23322284+1551106 = SN 2014az, obtained with the Las Campanas du Pont
telescope (+ WFCCD) on May 5.4 UT, reveals that this is a type-II supernova.
Comparison with a library of supernova spectra via the Superonva
Identification tool (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) provides
excellent matches with many type II-p supernovae between 2 and 3 weeks from
maximum light.  Adopting for the host galaxy the recession velocity of 4041
km/s (Huchra et al. 1999, Ap.J. Suppl. 121, 287; via NED), the minimum of the
H_beta absorption appears blueshifted by 7100 km/s.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2014 CBAT
2014 May 17                      (CBET 3872)              Daniel W. E. Green