[IAUC] CBET 4009: 20141030 : SUPERNOVA 2014dr IN UGC 2705 = PSN J03224639+0009207

Mie Oct 29 19:06:35 ART 2014

                                                  Electronic Telegram No. 4009
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 2014dr IN UGC 2705 = PSN J03224639+0009207
     S. Howerton, Arkansas City, KS, U.S.A.; A. J. Drake, S. G. Djorgovski, A.
Mahabal, M. J. Graham, and R. Williams, California Institute of Technology; M.
Catelan, Pontificia Universidad Catolica de Chile; and E. Christensen and S.
M. Larson, Lunar and Planetary Laboratory, University of Arizona, report the
Catalina Real-time Transient Survey discovery of an apparent supernova in
public images from the Catalina Sky Survey, with the discovery observation
tabulated below:

 SN       2014 UT       R.A. (2000.0) Decl.      Mag.      Offset
 2014dr   Oct. 14.41   3 22 46.39  +00 09 20.7   16.6    12".5 W, 23".0 N

The variable was designated PSN J03224639+0009207 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2014dr based on the
spectroscopic confirmation reported below.  Additional CCD magnitudes for
2014dr:  Oct. 15.40 UT, V = 16.74 +/- 0.05 (S. Howerton, remotely with the T21
iTelescope 0.43-m instrument near Mayhill, NM, U.S.A.; UCAC4 comparison stars;
image posted at URL https://www.flickr.com/photos/watchingthesky/15359324927);
18.029, 16.5 (G. Masi and P. Catalano; remotely with an 0.43-m f/6.8 telescope
at Ceccano, Italy; position end figures 46s.37, 20".3); 20.05, B = 16.93 +/-
0.17 (Howerton; remotely with the iTelescope 0.43-m T7 instrument at AstroCamp
Observatory. Nerpio, Spain; 20.09, V = 16.56 +/- 0.10, R = 16.57 +/- 0.13
(Howerton); 23.037, V = 16.8 (M. Martignoni, Magnago, Italy, 0.25-m f/10
Schmidt-Cassegrain telescope; position end figures 46s.37, 20".5).

     E. Cappellaro, L. Tomasella, S. Benetti, A. Pastorello, N. Elias-Rosa, P.
Ochner, and M. Turatto, Osservatorio Astronomico di Padova, Istituto Nazionale
di Astrofisica report that an optical spectrogram (range 340-820 nm;
resolution 1.2 nm) of PSN J03224639+0009207 = SN 2014dr, obtained on Oct. 23.0
UT with with the Asiago 1.82-m Copernico Telescope (+ AFOSC) under the Asiago
Transient Classification Program (Tomasella et al. 2014, AN 335, 841), shows
that the variable is a type-II supernova.  Assuming a recessional velocity of
6869 km/s for the host galaxy (Sloan Digital Sky Survey, via NED) the
spectrum, with broad and shallow Balmer P-Cyg features, resembles that of the
super-bright supernova 2008es (Gezari et al. 2009, Ap.J. 690, 13) about two
months after explosion.  However, with an apparent measured magnitude of r =
17.17, corresponding to an absolute magnitude -17.7, the brightness is close
to the average for type-II supernovae.  Classification was made via GELATO
(Harutyunyan et al. 2008, A.Ap. 488, 383) and SNID (Blondin and Tonry 2007,
Ap.J. 666, 1024).  The Asiago classification spectra are posted at website URL
http://sngroup.oapd.inaf.it.


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

                         (C) Copyright 2014 CBAT
2014 October 30                  (CBET 4009)              Daniel W. E. Green