Electronic Telegram No. 2931
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 2011io
     Pavel Balanutsa and Vladimir Lipunov, on behalf of the MASTER team (cf.
CBETs 2162, 2927), report the discovery of an apparent supernova (mag 16.2)
on an unfiltered CCD image (limiting mag 19.7) taken on Nov. 27.48 UT.  The
new object is located at R.A. = 23h02m47s.60, Decl. = +8d48'09".8 (equinox
2000.0, presumed), which is 12".4 east and 8".6 south of the center of the
presumed host galaxy.  Nothing is visible at this position on a MASTER
image taken at Kislovodsk on 2010 Sept. 28.80 (limiting mag 19.6).

     M. Fraser, L. Magill, S. Smartt, and R. Kotak, Queens University,
Belfast, report that they obtained a spectrogram (range about 320-910 nm) of
2011io with the Nordic Optical Telescope (+ ALFOSC + Grism #4) on Nov. 29.0
UT; when cross-correlated with a range of template spectra using SNID (Blondin
and Tonry 2007, Ap.J. 666, 1024), 2011io is a good match to several normal
type-Ia supernovae close to maximum light, and at a redshift z about 0.04.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2011 CBAT
2011 December 3                  (CBET 2931)              Daniel W. E. Green