SN 2012av (A.R. 15 46 17.51, Dec. +10 45 34.5) scoperta il 16 marzo 2012 nella galassia UGC10026 (offset 3W 4N), magnitudine 17.5, tipo II.
SN scoperta da F. Ciabattari ed E. Mazzoni con il telescopio Newton da 50cm dell'Osservatorio di Monte Agliale (Lucca).
Electronic Telegram No. 3053
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.
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SUPERNOVA 2012av IN UGC 10026 = PSN J15461751+1045345
F. Ciabattari and E. Mazzoni, Borgo a Mozzano, Italy, report the discovery
of an apparent supernova (mag 17.5) on unfiltered CCD images (limiting mag
19.5) obtained on Mar. 16.16 and 16.98 UT with a 0.5-m Newtonian telescope in
the course of the Italian Supernovae Search Project. The new object is
located at R.A. = 15h46m17s.51, Decl. = +10d45'34".5 (equinox 2000.0;
astrometry with respect to UCAC-2 stars), which is 3" west and 4" north of the
center of the galaxy UGC 10026. Nothing is visible at this position on
Palomar Sky Survey plates from 1988 May 18 (J plate; limiting mag 20.3) and
1989 Apr. 6 (F plate; limiting mag 20.3) or on images taken by the discoverers
on 2012 Mar. 2 (limiting magnitude 19.0). The variable was designated PSN
J15461751+1045345 when it was posted at the Central Bureau's TOCP webpage and
is here designated SN 2012av based on the spectroscopic confirmation reported
below.
L. Tomasella, S. Benetti, A. Pastorello, S. Valenti, and P. Ochner,
Istituto Nazionale di Astrofisica, Osservatorio Astronomico di Padova, report
that a spectrogram of PSN J15461751+1045345 = SN 2012av, obtained on Mar.
17.08 UT with the 1.82-m Copernico Telescope (+ AFOSC; range 340-790 nm,
resolution 2.4 nm), indicates that it is a young type-II supernova. Cross-
correlation with a library of supernova spectra via GELATO (Harutyuyan et al.
2008, A.Ap. 488, 383) gives a best fit with type-II supernovae soon after
explosion, assuming z = 0.018 for the host galaxy, UGC 10026 (SDSS 2004, via
NED).
NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.
(C) Copyright 2012 CBAT
2012 March 18 (CBET 3053) Daniel W. E. Green