Free Access
Astron. Astrophys. Suppl. Ser.
Volume 138, Number 3, September 1999
Gamma-Ray Bursts in the Afterglow Era Contents Rome, November 3-6, 1998
Page(s) 415 - 416
Published online 15 September 1999
DOI: 10.1051/aas:1999108

Astron. Astrophys. Suppl. Ser. 138, 415-416

Correlations between intensity and spectral hardness in GRBs

B.M. Belli

Istituto di Astrofisica Spaziale, C.N.R., Roma, Italy

Received January 21; accepted June 7, 1999


We studied the distribution of the peak photon flux as a function of the spectral hardness (in this paper represented by the hardness-ratio) for the 4B BATSE catalog events. The maximum value of the peak distribution shows, for the first part of the hardness ratio variability range, clear positive correlation with the hardness-ratio up to a given value of the hardness-ratio. On the contrary, for higher hardness-ratio values, an anticorrelation is present. Possible interpretations of these peculiar behaviors are briefly discussed.

Key words: gamma-rays: bursts

Copyright The European Southern Observatory (ESO)

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.