[IAUC] CBET 2616: 20110101 : POSSIBLE NOVA IN PISCES

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                                                  Electronic Telegram No. 2616
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


POSSIBLE NOVA IN PISCES
     S. Nakano, Sumoto, Japan, reports the discovery by Hideo Nishimura,
Miyawaki, Kakegawa, Shizuoka-ken, Japan, of a nova or new variable (mag 11.5)
on four CCD frames (limiting magnitude 13.5) taken around 2010 Dec. 29.40 UT
using a Canon 200-mm f/3.2 lens with a Canon EOS 5D Digital camera mounted on
a Takahashi EM100 equatorial telescope.  On a similar image (limiting mag 14.0)
taken on Dec. 25.39, Nishimura reports that the variable appeared at mag about
13.7.  Nishimura's measured position for the variable is R.A. = 23h04m25s.83,
Decl. = +6d25'45".8 (equinox 2000.0).  Nakano has measured the position end
figures 25s.76 +/- 0s.05, 47".1 +/- 2".0 (probable error +/- 3") and mag
13.7 +/- 0.6 from two Dec. 29.4 BMP images supplied by Nishimura, calling into
question the 11.5-magnitude figure reported by Nishimura.  Nakano also forwards
position end figures 25s.90, 46".0 (and magnitude 13.8) for the variable from
K. Kadota (Ageo, Japan, 0.25-m f/5 reflector + SBIG ST-9E camera) from ten
stacked, unfiltered 20-s CCD images (limiting mag 18.1) taken on Dec. 31.37,
adding that Kadota found a USNO-B1.0-catalogue star at position end figures
25s.859, 46".03 with blue mag 19.8 and red mag 18.9.  Nakano further adds
that T. Yusa (Osaki, Japan) finds an object on a Digitized Sky Survey image
from 1990 Oct. 14 at position end figures 25s.88, 45".8 (and mag 19.4 but
no plate type or bandpass indicated).


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                         (C) Copyright 2011 CBAT
2011 January 1                   (CBET 2616)              Daniel W. E. Green