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IAUC 6714: V1333 Aql; C/1997 N1; C/1997 J2; C/1995 O1

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                                                  Circular No. 6714
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/cfa/ps/cbat.html
Phone 617-495-7244/7440/7444 (for emergency use only)


V1333 AQUILAE
     P. Charles and E. Kuulkers, Oxford University; J. Casares,
Instituto de Astrofisica de Canarias; P. Hakala, University College,
London, and Mullard Space Science Laboratory; and P. Muhli, Helsinki
University, report: "Optical CCD photometry of V1333 Aql = Aql X-1
with the Nordic Optical Telescope on Aug. 7 shows that it has brightened
to V = 17.8 from its quiescent level near mag 19.  This brightening
occurred during the preceding week, as it was close to quiescence on
July 30.  Spectroscopy on Aug. 6 with the William Herschel Telescope
reveals a blue continuum with superposed Bowen blend, He II 468.6-nm
and Balmer emission lines (the H alpha equivalent width being
approximately 0.9 nm), confirming the object's return to activity.
An examination of the publicly-available quicklook products of the
RXTE ASM shows the presence of weak x-ray emission at a level of
30-40 mCrab beginning between Aug. 1 and 5.  This may be a precursor
to a major outburst, as occurred six months ago (IAUC 6558).  Close
monitoring of Aql X-1 is required, especially at different wavelengths."


COMET C/1997 N1 (TABUR)
     G. J. Garradd, Loomberah, N.S.W., making CCD observations with a
0.25-m reflector, reports on the increasing diffuseness of this comet
in late July, particularly on July 29, and apparently not just because
of the comet's low altitude in the dawn sky.


COMET C/1997 J2 (MEUNIER-DUPOUY)
     Total visual magnitude estimates: July 11.94 UT, 12.3 (M. Lehky,
Hradec Kralove, Czech Republic, 0.42-m reflector); 13.97, 12.0 (K. Hornoch,
Lelekovice, Czech Republic, 0.35-m reflector); 24.19, 12.2 (A. Hale,
Cloudcroft, NM, 0.41-m reflector); 29.93, 12.2 (G. Comello, Roden,
The Netherlands, 0.30-m reflector); 29.96, 12.31 (R. J. Bouma, Groningen,
The Netherlands, 0.25-m reflector); Aug. 3.24, 12.3 (C. E. Spratt,
Victoria, BC, 0.20-m reflector); 7.10, 12.2 (J. Bortle, Stormville, NY,
0.41-m reflector).


COMET C/1995 O1 (HALE-BOPP)
     Total visual magnitude estimates: July 27.89 UT, 4.0 (A. Pearce,
Subiaco, Western Australia, 20 x 80 binoculars); 30.81, 3.1 (D. A. J.
Seargent, The Entrance, N.S.W., naked eye); Aug. 2.35, 4.1 (W. C. de
Souza, Sao Paulo, Brazil, 7 x 50 binoculars).

                      (C) Copyright 1997 CBAT
1997 August 8                  (6714)              Brian G. Marsden

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