STRONG GAMMA-RAY BURSTS OBSERVED BY COMPTEL DURING ITS SECOND 
YEAR OF OPERATION

R. M. Kippen, A. Connors, M. McConnell, J. Ryan (University of New Hampshire, 
Space Science Center, Durham, NH 03824, USA)
W. Collmar, J. Greiner, V. Schoenfelder, M. Varendorff (Max-Planck Institut 
fur Extraterrische Physik, D-85740, Garching, FRG)
W. Hermsen, L. Kuiper (SRON-Leiden, P.B. 9504, NL-2300 RA Leiden, NL)
K. Bennett, L. Hanlon, O.R. Williams, C. Winkler (Astrophysics Division, 
ESTEC, NL-2200 AG Noordwijk, NL)

The imaging Compton telescope COMPTEL onboard the Compton Gamma Ray 
Observatory regularly observes cosmic gamma-ray bursts.  In its primary mode 
of operation, COMPTEL measures the locations and spectra of bursts occurring 
inside its ~1 sr field-of-view in the energy range from 0.75 to 30 MeV. In 
this mode, COMPTELÕs spectral resolution is about 10% FWHM (at 1 MeV) and 
strong bursts can be located to better than 1¡.  Additional time-resolved 
spectral measurements in the energy range 0.1 to 10 MeV are made by individual 
COMPTEL ÔburstÕ detectors.  During its second year of operation, COMPTEL 
observed several gamma-ray bursts in both the main instrument and the burst 
detectors.  Some of these events, including GRB920622, GRB920830, 
GRB930131 and GRB930309 were strong enough to allow source localization 
and detailed spectral investigation.  The strong bursts GRB930131 and 
GRB930309 were imaged in record time only hours after their detection, 
yielding burst locations suitable for rapid wide-field optical/radio 
counterpart searches.




R. Marc Kippen				For meeting E.2 (Gamma-Ray 
Astronomy)
Space Science Center, Morse Hall	MSO: N. Gehrels
University of New Hampshire		Oral presentation preferred
Durham, NH  03824
Tel: (603) 862-4703
Fax: (603) 862-4685
E-mail: rmkippen@unh.edu


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