Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...288..213a&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 288, no. 1, p. 213-218
Astronomy and Astrophysics
Astronomy
8
Comparison, Distance, Gamma Ray Astronomy, Gamma Ray Bursts, Radiant Flux Density, Cosmology, Data Correlation, Dispersion, Gamma Ray Spectra, Granat Satellite, Luminosity, Red Shift, Ulysses Mission, Variations
Scientific paper
We compare the characteristics of 35 gamma-ray bursts (GRBs) detected simultaneously by Phebus aboard Granat and the Ulysses GRB experiment. Phebus observes a medium to high energy range (100 keV - 100 MeV), while the Ulysses GRB detector is sensitive to lower energy photons (25 - 150 keV). Comparison of the peak counts recorded by these two instruments shows that the variation in burst intensities is more extended for Phebus (above approximately 150 keV) than for Ulysses GRB. This result confirms similar observations from other instruments (Atteia et al. 1991; Mitrofanov et al. 1992; Belli 1992). We discuss the consequences of this behavior for the statistical properties of GRBs, and for the searches for a possible cosmological redshift.
Atteia Jean-Luc
Barat Claude
Boer Michel
Dezalay Jean-Pascal
Hurley Kevein
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