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IAUC 5932: gamma-RAY BURST; eta Car; P/SCHWASSMANN-WACHMANN 1

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                                                  Circular No. 5932
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Telephone 617-495-7244/7440/7444 (for emergency use only)
TWX 710-320-6842 ASTROGRAM CAM     EASYLINK 62794505
MARSDEN@CFA or GREEN@CFA (.SPAN, .BITNET or .HARVARD.EDU)


gamma-RAY BURST
     A. Goldwurm, S. Gaertner, E. Churazov, and M. Gilfanov, on
behalf of the Granat SIGMA team (Service d'Astrophysique, Centre
d'Etudes de Saclay; Centre d'Etude Spatiale des Rayonnements,
Toulouse; Space Research Institute, Moscow), report:  "The SIGMA
telescope onboard the Granat Observatory detected a gamma-ray burst
on Feb. 6.00625 UT, which lasted about 16 s and was detected in the
energy range 40-480 keV through an interruption of the passive
shield acting as a collimator.  The localization process is based
on a maximum likelihood method, yielding a signal-to-noise ratio of
24.  The 1-sigma error box of the burst is approximately rectangular-
shaped, the corners having the following positions:  R.A. =
10h04m00s, Decl. = -68o40'.2; 9h57m19s, -68o00'.0; 10h46m41s,
-57o19'.8; 11h01m19s, -56o19'.8 (equinox 1950.0)."


eta CARINAE
     S. White, University of Maryland; R. Duncan, Australia
Telescope; S. Drake, Goddard Space Flight Center; J. Lim, California
Institute of Technology; and M. Kundu, University of Maryland,
report: "Australia Telescope observations of the luminous blue
variable eta Car show that it is undergoing a radio outburst, with the
flux having doubled in the last 7 months and apparently still
increasing. It is currently a 2-Jy radio source at 9 GHz.  The rise
in flux is associated with the appearance of a new feature in the
radio images, about 1".1 northwest of the radio source attributed
to the stellar wind and almost as bright.  Assuming that this
feature is due to a gas clump ejected asymmetrically by the star and
radiating thermal free-free emission, the minimum mass involved is
0.005 solar mass.  Infrared observations to follow the history of
dust formation in this gas clump would be valuable."


PERIODIC COMET SCHWASSMANN-WACHMANN 1
     Total visual magnitude estimates (cf. IAUC 5915):  Jan. 10.31
UT, 11.9 (R. Keen, Mt. Thorodin, CO, 0.32-m reflector); 23.19, 12.3
(H. Mikuz, Ljubljana, Slovenia, 0.20-m Baker-Schmidt camera + CCD +
V filter); 29.7, 13.3 (Mikuz); Feb. 7.56, 13.3 (T. Kojima, Chiyoda,
Ohra, Gunma, Japan, 0.25-m reflector + CCD); 10.57, 12.3 (Kojima).


1994 February 10               (5932)            Daniel W. E. Green

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