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IAUC 6084: 1994q; X-RAY N IN Sco; GX 339-4; NOTICE TO SUBSCRIBERS

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                                                  Circular No. 6084
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
Phone 617-495-7244/7440/7444     TWX 710-320-6842 ASTROGRAM CAM
MARSDEN@CFA.HARVARD.EDU or GREEN@CFA.HARVARD.EDU (science)


PERIODIC COMET LONGMORE (1994q)
     J. V. Scotti, Lunar and Planetary Laboratory, reports his recovery
of this comet as follows.  The comet is essentially of stellar appearance
and its position in very close agreement with the prediction on MPC 20123.

     1994 UT             R.A. (2000) Decl.        m1
     Sept.27.47845    9 39 46.16   +35 27 49.7   20.5
          27.48339    9 39 46.66   +35 27 47.5
          27.48787    9 39 47.15   +35 27 47.4
          28.46961    9 41 16.32   +35 23 25.8
          28.47579    9 41 16.70   +35 23 24.8
          28.48108    9 41 17.30   +35 23 22.8   21.0


X-RAY NOVA IN SCORPIUS
     B. A. Harmon, C. A. Wilson, W. S. Paciesas, S. N. Zhang and G. J.
Fishman report for the BATSE/Compton Observatory Team: "We have been
observing this object in the 20-100-keV band at a level of 75 mCrab
(+/- 30 percent) since Sept. 17.  This followed a more intense period,
which began on Sept. 6 (IAUC 6075) and ended approximately on Sept. 16,
when the source showed daily variations between 200 and 900 mCrab.
The spectrum continues to be well represented by a power law between
20 and 200 keV with an index of approximately -3 in the Sept. 6-16
time period."


GX 339-4
     Harmon et al. add: "We are currently observing a hard (low) state
outburst of the black-hole candidate GX 339-4.  DuringSept. 24-26
its intensity in the 20-100-keV band gradually increased from 150 to 200
mCrab (+/- 15 percent).  Owing to the recent activity of several hard
x-ray sources in the Sco-Ara region, it is difficult at this time
to establish when the outburst began.  Preliminary indications are that
the source was first detectable around Sept. 5-10.  Based on the behavior
of previous outbursts, the measured thermal bremsstrahlung temperature of
kT = 73 +/- 8 keV is consistent with the source's being a few weeks
to a month into its outburst."


NOTICE TO SUBSCRIBERS
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at the top of this Circular can be used for information about
subscriptions but should not be used for scientific matters.


1994 October 1                 (6084)              Brian G. Marsden

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