[IAUC] CBET 2909: 20111122 : SUPERNOVA 2011hz = PSN J08523424+5515142

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                                                  Electronic Telegram No. 2909
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 2011hz = PSN J08523424+5515142
     Denis V. Denisenko, Space Research Institute, Moscow, reports his
discovery of a possible supernova (mag 18.2) on four unfiltered CCD images
obtained on Nov. 3.88 UT by V. Gerke and S. Korotkiy remotely with the 40-cm
Djigit telescope (+ SBIG STL-11K camera) at the Ka-Dar Observatory's TAU
station (Nizhniy Arkhyz, Karachay-Cherkessia).  The new object is located at
R.A. = 8h52m34s.24, Decl. = +55d15'14".2 (equinox 2000.0; uncertainty 0".1),
which is 0".9 west and 0".4 north of the presumed host galaxy (SDSS
J085234.35+551513.8; magnitudes u = 21.3, g = 20.6, r = 20.2, i = 19.9, z =
19.8).  A comparison of the discovery image and a Palomar Sky Survey red
plate is posted at URL http://pics.livejournal.com/bigdenru/pic/000as20q/g35.
The variable was designated PSN J08523424+5515142 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2011hz based on the
spectroscopic confirmation reported below.  Additional CCD magnitudes for
2011hz (unfiltered unless noted otherwise):  Nov. 3.48, 18.5 (Catalina Sky
Survey, via A. Drake and S. Korotkiy); 7.94, 18.5 (V. Gerke and S. Korotkiy,
40-cm Djigit discovery telescope, TAU station); 8.418, R = 17.8 (Joseph
Brimacombe, Cairns, Australia; position end figures 34s.34, 13".9); 13.096,
18.5 (Federica Luppi and Luca Buzzi, Varese, Italy; position end figures
34s.34, 13".9; reference stars from CMC-14 catalogue).

     S. Valenti, A. Pastorello, S. Benetti, L. Tomasella, F. Bufano, and P.
Ochner, Istituto Nazionale di Astrofisica, Osservatorio Astronomico di Padova,
on behalf of a larger collaboration, report that a spectrogram of PSN
J08523424+5515142 = SN 2011hz, obtained on Nov. 20.03 UT with the 1.82-m
Copernico Telescope (+ AFOSC; range 340-790 nm, resolution 2.2 nm), suggests
that it is a type-Ia supernova.  Cross-correlation with a library of supernova
spectra using the "Supernova Identification" code (SNID; Blondin and Tonry
2007, Ap.J. 666, 1024) indicates that 2011hz is similar to the type-Ia
supernova 1994D at about two week past maximum.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2011 CBAT
2011 November 22                 (CBET 2909)              Daniel W. E. Green