Electronic Telegram No. 3181
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 2012dq IN UGC 4067 = PSN J07545548+7236346
     Giancarlo Cortini, Predappio, Italy, reports the discovery of an apparent
supernova (mag 15.4) on several unfiltered CCD images (limiting mag 18.5)
taken on July 9.91 UT (no instrumentation specified).  The new object is
located at R.A. = 7h54m55s.48, Decl. = +72d36'34".6 (equinox 2000.0), which is
6" east and 8" south of the center of UGC 4067.  The variable was designated
PSN J07545548+7236346 when it was posted at the Central Bureau's TOCP webpage
and is here designated SN 2012dq based on the spectroscopic confirmation
reported below.  Additional CCD magnitudes for 2012dq:  Apr. 27.9, [18.5
(Cortini); May 27.9, [18.5 (Cortini); July 11.088, 15.7 (Federica Luppi and
Luca Buzzi, Varese, Italy; 0.38-m f/6.8 reflector; position end figures
55s.48, 34".4; reference stars from NOMAD catalogue; image posted at website
URL http://www.astrogeo.va.it/pub/TOCP/PSN_U4067.jpg).

     L. Tomasella, S. Benetti, E. Cappellaro, P. Ochner, A. Pastorello, M.
Turatto, and S. Valenti, Osservatorio Astronomico di Padova, Istituto Nazionale
di Astrofisica, report that a spectrogram of PSN J07545548+7236346 = SN 2012dq,
obtained on July 17.08 UT with the Asiago 1.82-m Copernico Telescope (+ AFOSC;
range 340-820 nm; resolution 2.4 nm), suggests that it is a type-Ia supernova.
After adopting for the host galaxy, UGC 4067, a redshift z = 0.0115 (de
Vaucouleurs et al. 1991, RC3.9, via NED); a comparison with a library of
supernovae spectra via GELATO (Harutyuyan et al. 2008, A.Ap. 488, 383) shows
that 2012dq is a type-Ia event at about one month after maximum.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2012 CBAT
2012 July 18                     (CBET 3181)              Daniel W. E. Green