Precursors of short gamma-ray bursts in the SPI-ACS/INTEGRAL experiment

被引：32

作者：

Minaev, P. Yu. ^{[1
]}

Pozanenko, A. S. ^{[1
,2
]}

机构：

[1] Russian Acad Sci, Space Res Inst, Profsoyuznaya Ul 84-32, Moscow 117997, Russia

[2] MEPhI Natl Res Nucl Univ, Kashirskoe Sh 31, Moscow 115409, Russia

来源：

ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS | 2017年 / 43卷 / 01期

基金：

俄罗斯基础研究基金会;

关键词：

gamma-ray bursts; short gamma-ray bursts; precursors; SPI-ACS; INTEGRAL; GBM; LAT; Fermi; EXTENDED EMISSION; GRB; 090510; CATALOG;

D O I：

10.1134/S1063773717010017

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have analyzed the light curves of 519 short gamma-ray bursts (GRBs) detected in the SPI-ACS/INTEGRAL experiment from December 2002 toMay 2014 to search for precursors (a possible activity of the GRB source before the beginning of themain episode). Both the light curves of 519 individual events and the averaged light curve of 372 brightest bursts have been analyzed. In several cases, we have found and thoroughly studied precursor candidates based on SPI-ACS/INTEGRAL, GBM/Fermi, and LAT/Fermi data. A statistical analysis of the averaged light curve for the entire sample of short bursts has revealed no regular precursor. Upper limits for the relative intensity of precursors have been estimated. We have compared our results with those of other authors; no convincing evidence for the existence of precursors of short GRBs has been found. We show that the fraction of short GRBs with precursors is less than 0.4% of all short bursts.

引用

页码：1 / 20

页数：20

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