[IAUC] CBET 2761: 20110706 : SUPERNOVA 2011dz IN UGC 10273 = PSN J16124482+2817032

[quai en eps.harvard.edu]

                                                  Electronic Telegram No. 2761
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 2011dz IN UGC 10273 = PSN J16124482+2817032
     Denis Vida, on behalf of the "La Sagra Sky Survey" (LSSS) Supernova
Search Team" (which also includes Filip Novoselnik, Ivica Skokic, David
Gostinski, Robert Gregic, Salvador Sanchez, Jaime Nomen, Reiner Stoss, Bill
Yeung, Juan Rodriguez and Miguel Hurtado), report the discovery of an apparent
supernova (red magnitude 16.4) on three CCD images (limiting mag about 20.0)
taken on June 26.946, 26.956, and 26.967 UT with a 0.45-m telescope.  The new
object is located at R.A. = 16h12m44s.82, Decl = +28d17'03".2 (equinox 2000.0),
which is 0".2 east and 4".8 south of the nucleus of the presumed host galaxy,
UGC 10273.  The variable was designated PSN J16124482+2817032 when posted at
the Central Bureau's TOCP webpage and is here designated SN 2011dz based on
the spectroscopic report below.  Additional approximate magnitudes for
2011dz supplied by Vida, from unfiltered images LSSS unless otherwise noted:
1989 May 3.293, [22 (Digitized Sky Survey, red plate); 2010 May 19.979, [20
(LSSS); 20.954, [20 (LSSS); 2011 April 2.035, [20 (LSSS); June 27.883, 16.4
(LSSS, red).  All LSSS images from 2010 May to 2011 June have been posted
(with the red DSS image on the right) at the following website URL:
http://img89.imageshack.us/img89/1737/ugc10273archive.png; the June 26 images
are posted at http://img819.imageshack.us/img819/3272/ugc10273candidate.png.

     D. D. Balam, Dominion Astrophysical Observatory, National Research Council
of Canada (NRCC); M. L. Graham, Las Cumbres Observatory Global Telescope,
University of California at Santa Barbara; E. Y. Hsiao, Lawrence Berkeley
Laboratory; and D. W. E. Green, Harvard University, report that a spectrogram
(range 389-725 nm, resolution 0.3 nm) of PSN J16124482+2817032 = SN 2011dz,
obtained on July 5.37 UT with the 1.82-m Plaskett Telescope of the NRCC,
shows it to be a type-Ia supernova about 35 days past maximum light.
Cross-correlation with a library of supernova spectra using the "Supernova
Identification" code (Blondin and Tonry 2007, Ap.J. 666, 1024) indicates that
2011dz is most similar to the type-Ia supernova 2002ic at 35 days past
maximum light.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2011 CBAT
2011 July 6                      (CBET 2761)              Daniel W. E. Green