Fluence distribution of terrestrial gamma ray flashes observed by the Fermi Gamma-ray Burst Monitor

被引：29

作者：

Tierney, D. ^{[1
]}

Briggs, M. S. ^{[2
,3
]}

Fitzpatrick, G. ^{[1
]}

Chaplin, V. L. ^{[2
]}

Foley, S. ^{[1
]}

McBreen, S. ^{[1
]}

Connaughton, V. ^{[2
,3
]}

Xiong, S. ^{[2
]}

Byrne, D. ^{[1
]}

Carr, M. ^{[1
]}

Bhat, P. N. ^{[2
]}

Fishman, G. J. ^{[4
]}

Greiner, J. ^{[5
]}

Kippen, R. M. ^{[6
]}

Meegan, C. A. ^{[7
]}

Paciesas, W. S. ^{[7
]}

Preece, R. D. ^{[2
,3
]}

von Kienlin, A. ^{[5
]}

Wilson-Hodge, C. ^{[8
]}

机构：

[1] Univ Coll Dublin, Sch Phys, Dublin 4, Ireland

[2] Univ Alabama, CSPAR, Huntsville, AL 35899 USA

[3] Univ Alabama, Dept Phys, Huntsville, AL 35899 USA

[4] Jacobs Engn Inc, Huntsville, AL USA

[5] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany

[6] Los Alamos Natl Lab, Los Alamos, NM USA

[7] NASA, George C Marshall Space Flight Ctr, Univ Space Res Assoc, Huntsville, AL 35812 USA

[8] NASA, George C Marshall Space Flight Ctr, Space Sci Off, Huntsville, AL 35812 USA

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS | 2013年 / 118卷 / 10期

基金：

爱尔兰科学基金会;

关键词：

tgf;

D O I：

10.1002/jgra.50580

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The observed ray fluence distribution of terrestrial gamma ray flashes (TGFs) detected by the Fermi Gamma-ray Burst Monitor (GBM) is altered by instrumental effects. We perform corrections for dead time, pulse pileup, and detection efficiency in a model-independent manner. A sample of 106 GBM TGFs is selected to include both TGFs that triggered GBM and weaker TGFs found using an off-line search. Detector dead time and pulse pileup lower the observed fluence of each TGF and the detection efficiency causes weaker TGFs to have a lower probability of detection than brighter TGFs. Monte Carlo simulations are performed in each case to correct for these effects. The corrected fluence distribution is well fit with a power law of index =-2.200.13. This is consistent with previous estimates using other techniques. Neither a high-fluence cutoff nor a low-fluence limit is found. The fluence distribution is also expressed in units of TGF h(-1) km(-2) versus photons cm(-2) per TGF.

引用

页码：6644 / 6650

页数：7

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