Temporal properties of short gamma-ray bursts

Ehud Nakar; Tsvi Piran

doi:10.1046/j.1365-8711.2002.05136.x

Temporal properties of short gamma-ray bursts

Ehud Nakar^*
, Tsvi Piran

^*Corresponding author for this work

Racah Institute of Physics

Research output: Contribution to journal › Article › peer-review

68 Scopus citations

Abstract

We analyse a sample of bright short bursts from the BATSE 4B-catalog and find that many short bursts are highly variable (δt_min/T ≪ 1, where δt_min is the shortest pulse duration and T is the burst duration). This indicates that it is unlikely that short bursts are produced by external shocks. We also analyse the available (first 1-2 s) high-resolution Time Tagged Events (TTE) data of some of the long bursts. We find that variability on a 10-ms time-scale is common in long bursts. This result shows that some long bursts are even more variable than it was thought before (δt_min/T ≈ 10^-4-10^-3).

Original language	English
Pages (from-to)	920-926
Number of pages	7
Journal	Monthly Notices of the Royal Astronomical Society
Volume	330
Issue number	4
DOIs	https://doi.org/10.1046/j.1365-8711.2002.05136.x
State	Published - 11 Mar 2002

Keywords

Gamma-rays: bursts

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10.1046/j.1365-8711.2002.05136.x

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N2 - We analyse a sample of bright short bursts from the BATSE 4B-catalog and find that many short bursts are highly variable (δtmin/T ≪ 1, where δtmin is the shortest pulse duration and T is the burst duration). This indicates that it is unlikely that short bursts are produced by external shocks. We also analyse the available (first 1-2 s) high-resolution Time Tagged Events (TTE) data of some of the long bursts. We find that variability on a 10-ms time-scale is common in long bursts. This result shows that some long bursts are even more variable than it was thought before (δtmin/T ≈ 10-4-10-3).

AB - We analyse a sample of bright short bursts from the BATSE 4B-catalog and find that many short bursts are highly variable (δtmin/T ≪ 1, where δtmin is the shortest pulse duration and T is the burst duration). This indicates that it is unlikely that short bursts are produced by external shocks. We also analyse the available (first 1-2 s) high-resolution Time Tagged Events (TTE) data of some of the long bursts. We find that variability on a 10-ms time-scale is common in long bursts. This result shows that some long bursts are even more variable than it was thought before (δtmin/T ≈ 10-4-10-3).

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JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 4

ER -

Temporal properties of short gamma-ray bursts

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Keywords

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