55 citations · 91 across the 4 of their papers we have counts for
4 papers · 1 filter
Does the Redshift Distribution of Swift Long GRBs Trace the Star-Formation Rate?
Ali M. Hasan, Walid J. Azzam
Gamma-ray bursts (GRBs) are extremely powerful explosions that have been traditionally classified into two categories: long bursts (LGRBs) with an observed duration T90 > 2 s, and…
Determination of Cosmological Parameters from Gamma Ray Burst Characteristics and Afterglow Correlations
Hannachi Zitouni, Nidhal Guessoum, Jamil Walid Azzam
We use the correlation relation between the energy emitted by the GRBs in their prompt phases and the X-ray afterglow fluxes, in an effort to constrain cosmological parameters and…
Statistical Study of Observed and Intrinsic Durations among BATSE and Swift/BAT GRBs
Hannachi Zitouni, Nidhal Guessoum, Walid Jamil Azzam +1
Studies of \textit{BATSE} bursts \citep{kouveliotou:93} have resulted in the widespread adoption of a two-group categorization: long bursts (those with durations seconds)…
Revisiting the Amati and Yonetoku Correlations with Swift GRBs
Hannachi Zitouni, Nidhal Guessoum, Walid Jamil Azzam
We use a sample of \textit{Swift} gamma-ray bursts (GRBs) to analyze the Amati and Yonetoku correlations. The first relation is between , the intrinsic peak energy of the…