Electronic Telegram No. 2261
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
CBAT Director:  Daniel W. E. Green; Room 209; Dept. of Earth and Planetary
 Sciences; Harvard University; 20 Oxford St.; Cambridge, MA  02138; U.S.A.
e-mail:  cbat@iau.org; cbatiau@eps.harvard.edu
URL http://www.cfa.harvard.edu/iau/cbat.html


POSSIBLE NOVA IN SAGITTARIUS
     Koichi Nishiyama, Kurume, Japan; and Fujio Kabashima, Miyaki, Japan,
report their discovery of a possible Milky Way nova (mag 11.2) on two 40-s
unfiltered CCD frames (limiting magnitude 13.2) taken around Apr. 23.782 UT
using a 105-mm f/4 camera lens (+ SBIG STL6303E camera).  They used five 2-s
unfiltered CCD frames (limiting magnitude 17.0) taken around Apr 23.791 with
a Meade 200R 0.40-m f/9.8 reflector (+ SBIG STL1001E camera) to measure the
following precise position for the variable:  R.A. = 17h53m02s.98, Decl. =
-28d12'19".4 (equinox 2000.0).  Nothing is visible at this position on their
survey frames taken on Apr. 2.831 (limiting mag 12.9) and 16.749 (limiting
mag 13.1), nor on the Digitized Sky Survey from a red plate taken on 1996
Sept. 12 (limiting mag 17.5).  A USNO-B1.0-catalogue star of red mag 17.4
has position end figures 03s.11, 19".0.  A confirming image by Nishiyama and
Kabashima with the 0.40-m reflector on Apr 24.673 yields mag 11.6 and
position end figures 03s.00, 19".3.  After being alerted by Nishiyama and
Kabashima, T. Yusa (Osaki, Japan) obtained a co-added unfiltered CCD image
(limiting mag 16.5) with a 0.30-m f/8.2 Cassegrain reflector on Apr. 24.660,
yielding mag 11.1 and position end figures 02s.98, 19".3.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2010 CBAT
2010 April 24                    (CBET 2261)              Daniel W. E. Green