Astronomy and Astrophysics – Astrophysics
Scientific paper
1995-05-31
Astronomy and Astrophysics
Astrophysics
12 pages uuencoded compressed postscript with figures Accepted for publ. in A&A
Scientific paper
We have analyzed the Ulysses, BATSE, and COMPTEL spectral data from the $\gamma$-ray burst of June 22, 1992 (GB 920622). COMPTEL data reveal a hard to soft evolution within the first pulse of the burst, while the mean hardness ratios of the three pulses are the same. Unlike the single instrument spectra, the composite spectrum of GB 920622 averaged over the total burst duration ranging from 20 keV up to 10 MeV cannot be fit by a single power law. Instead, the spectrum shows continuous curvature across the full energy range. COMPTEL imaging and BATSE/Ulysses triangulation constrain the source location of GB 920622 to a ring sector 1.1 arcmin wide and 2 degrees long. This area has been searched for quiescent X-ray sources using \ros survey data collected about two years before the burst. After the optical identification of the X-ray sources in and near the GRB location we conclude that no quiescent X-ray counterpart candidate for GB 920622 has been found.
Bade Norbert
Boer Michel
Fishman Gerald J.
Greiner Jochen
Hanlon Lorraine O.
No associations
LandOfFree
The gamma-ray burst GB 920622 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The gamma-ray burst GB 920622, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The gamma-ray burst GB 920622 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-300626