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IAUC 7995: Poss. N IN SMC; 2002gw; 2002gx; C/2002 O4

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IAUC number

                                                  Circular No. 7995
Central Bureau for Astronomical Telegrams
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)

     W. Liller, Vina del Mar, Chile, reports his discovery, on
Technical Pan exposures taken on Oct. 16.20 UT, of a possible nova
(mag 12.3) near the center of the SMC in an extremely crowded star
field.  A CCD exposure on Oct. 17.204 yields broadband V mag 12.66
and position R.A. = 0h56m30s.4 +/- 0s.2, Decl. = -72o36'29".4 +/-
1".1 (equinox 2000.0).  No star brighter than mag 14 was seen on a
pair of exposures taken on Oct. 9.29.

     Independent reports of the discoveries of an apparent
supernova in NGC 922 have been received from Takao Doi (Weimar, TX)
and L. A. G. Monard (Pretoria, South Africa) -- both with 0.30-m
reflectors and unfiltered CCD cameras.  Doi provides the following
position for SN 2002gw:  R.A. = 2h25m02s.97, Decl. = -24o47'50".6
(equinox 2000.0), which is 21" west and 33" south of the center of
NGC 922.  Monard gives position end figures 02s.97, 51".9.  They
note that it is not visible on Digitized Sky Survey images --
Monard citing limiting red mag 19.5 and Doi noting a faint,
elongated (north-south) nebulosity almost at the same position.
Magnitude estimates for the new object:  Sept. 12.052 UT, [18.5
(Monard); Oct. 13.27, 17.3 (Doi); 15, 17.3 (Doi); 16.027, 17.6 +/-
0.3 (Monard); 16.832, 17.6 (Monard).

     Further to IAUC 7990, W. M. Wood-Vasey, G. Aldering, and P.
Nugent report the discovery of an apparent supernova (mag 19.0) on
unfiltered NEAT images taken with the Palomar 1.2-m Schmidt
telescope on Oct. 13.40, 13.41, and 13.42 UT (confirmed on Oct. 16
at mag 19.2).  The new object is located at R.A. = 2h31m44s.69,
Decl. = +40o16'39".5 (equinox 2000.0), which is 6" east and 7"
south of the center of the apparent host galaxy.  No point source
is visible at this location in previous NEAT images taken on 2001
Dec. 23 (limiting mag 20.2 at S/N = 3).

     Several observers have noted that this comet has lost its
condensation and is fading rapidly.  K. Kadota, Ageo, Saitama,
Japan (0.30-m reflector) reports (via S. Nakano) m_1 = 13.3 on a
CCD image taken on Oct. 10.82 UT, but Y. Ezaki (Toyonaka, Osaka,
Japan, 0.20-m reflector) could not find the comet to mag about 15
on an image taken two nights later.

                      (C) Copyright 2002 CBAT
2002 October 17                (7995)            Daniel W. E. Green

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