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IAUC 6746: CATACLYSMIC Var IN Peg; XTE J1755-324; 43P

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                                                 Circular No. 6746
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/iau/cbat.html
Phone 617-495-7244/7440/7444 (for emergency use only)


CATACLYSMIC VARIABLE IN PEGASUS
     Y.-l. Qiu, Q.-y. Qiao, and J.-y. Hu, Beijing Astronomical
Observatory (BAO); and A. Esamdin, Urmqi Astronomical Station,
report their discovery in the course of the BAO supernova survey of
a new cataclysmic variable star at R.A. = 21h12m29s.54, Decl. =
+12o32'06".5 (equinox 2000.0).  R magnitudes obtained with the
0.60-m telescope at Xinglong Station: Sept. 3 UT, [19.0; 18, [18.0;
20.52, 16.0; 21.49, 17.3.  The POSS-I plate shows a very faint
object at this postion, but nothing is present in the USNO A1.0
catalogue.  A spectrogram of the variable was obtained with the
2.16-m telescope at Xinglong on Sept. 21.58. The spectrum shows
typical features of cataclysmic variables during eruption, with a
blue continuum superimposed by weak H-alpha emission (equivalent
width 1.12 nm), H-beta emission in the core of the absorption, and
weak He I lines at 587.6 nm.


XTE J1755-324
     J. Paul, A. Goldwurm, E. Jourdain, J. P. Roques, R. Sunyaev,
E. Churazov, S. Trudolyubov, and M. Revnivtsev, on behalf of the
SIGMA/Granat team (Service d'Astrophysique du CEA, Saclay; Centre
d'Etude Spatiale des Rayonnements, Toulouse; Space Research
Institute, Moscow), communicate:  "During the first observation of
a new campaign dedicated to the galactic center, the SIGMA/Granat
telescope detected a hard x-ray source at R.A. = 17h52m, Decl. =
-32o.4 (equinox 1950.0; uncertainty +/- 5').  The position is
consistent with the newly-discovered soft source XTE J1755-324
(IAUC 6710).  The observation started on Sept. 16 and lasted about
40 hr.  Preliminary estimates of the source flux give 75 +/- 17
mCrab in the range 40-75 keV and 34 +/- 20 mCrab over 75-150 keV.
This is the first evidence of a hard component in the source
spectrum extending above 40 keV, and -- combined with a soft
blackbody component observed by XTE -- strongly suggests a
blackhole binary."


COMET 43P/WOLF-HARRINGTON
     Total visual magnitude estimates:  Sept. 1.10 UT, 12.6 (K.
Hornoch, Lelekovice, Czech Republic, 0.35-m reflector); 1.11, 13.2
(R. J. Bouma, Groningen, The Netherlands, 0.25-m reflector); 2.06,
12.5 (M. Plsek, Lelekovice, Czech Republic, 0.35-m reflector);
11.11, 13.0 (Bouma); 12.09, 12.6 (M. Meyer, Frauenstein, Germany,
0.25-m reflector).

                      (C) Copyright 1997 CBAT
1997 September 22              (6746)            Daniel W. E. Green

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