[IAUC] CBET 1622: 20081217 : SUPERNOVA 2008ex IN UGC 11428

[IAUC mailing list]

                                                  Electronic Telegram No. 1622
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS en CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT en CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html


SUPERNOVA 2008ex IN UGC 11428
     R. Arbour, South Wonston, Hants, U.K., reports that SN 2008ex (cf. CBETs
1470, 1472) has undergone a gradual but significant brightening for nearly
four months after discovery, as indicated by the following unfiltered
magnitudes (by Arbour with a 40-cm f/5 reflector unless noted otherwise):
Aug. 23 UT, 17.0 (G. M. Hurst); Sept. 18, 17.9; 26.817, 17.9; Oct. 22, 17.0;
24.795, 16.9; Dec. 11.751, 16.5.  Arbour notes that photometry is difficult
because of the very crowded field; he also provides the following position
for 2008ex:  R.A. = 19h20m28s.64, Decl. = +30o49'41".8 (equinox 2000.0),
which is 1".3 east and 9".5 north of the center of the galaxy UGC 11428 =
MCG +05-45-6.  Nothing is visible at this position on the Palomar Sky Survey
(via Digitized Sky Survey) plates of 1988 July 14 (blue) or 1987 June 21 (red).


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2008 CBAT
2008 December 17                 (CBET 1622)              Daniel W. E. Green