HIGH-ENERGY EMISSION OF GRB 130427A: EVIDENCE FOR INVERSE COMPTON RADIATION

被引：37

作者：

Fan, Yi-Zhong ^{[1
]}

Tam, P. H. T. ^{[2
,3
]}

Zhang, Fu-Wen ^{[1
,4
]}

Liang, Yun-Feng ^{[5
]}

He, Hao-Ning ^{[1
]}

Zhou, Bei ^{[1
,6
]}

Yang, Rui-Zhi ^{[1
,6
]}

Jin, Zhi-Ping ^{[1
]}

Wei, Da-Ming ^{[1
]}

机构：

[1] Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210008, Peoples R China

[2] Natl Tsing Hua Univ, Inst Astron, Hsinchu 30013, Taiwan

[3] Natl Tsing Hua Univ, Dept Phys, Hsinchu 30013, Taiwan

[4] Guilin Univ Technol, Coll Sci, Guilin 541004, Guangxi, Peoples R China

[5] Guangxi Univ, Dept Phys, Guangxi 530004, Peoples R China

[6] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

来源：

ASTROPHYSICAL JOURNAL | 2013年 / 776卷 / 02期

基金：

中国博士后科学基金;

关键词：

gamma rays: general; radiation mechanisms: non-thermal; GAMMA-RAY-BURSTS; VERY-HIGH-ENERGY; AFTERGLOW EMISSION; PHOTOSPHERIC EMISSION; SPECTRAL COMPONENTS; LONG-DURATION; GEV-TEV; 080319B; FLASHES; PROMPT;

D O I：

10.1088/0004-637X/776/2/95

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A nearby superluminous burst GRB 130427A was simultaneously detected by six gamma-ray space telescopes (Swift, the Fermi GLAST Burst Monitor (GBM)/Large Area Telescope, Konus-Wind, SPI-ACS/INTEGRAL, AGILE, and RHESSI) and by three RAPTOR full-sky persistent monitors. The isotropic gamma-ray energy release is similar to 10(54) erg, rendering it the most powerful explosion among gamma-ray bursts (GRBs) with a redshift z <= 0.5. The emission above 100 MeV lasted about one day, and four photons are at energies greater than 40 GeV. We show that the count rate of 100 MeV-100 GeV emission may be mainly accounted for by the forward shock synchrotron radiation and the inverse Compton radiation likely dominates at GeV-TeV energies. In particular, an inverse Compton radiation origin is favored for the similar to(95.3, 47.3, 41.4, 38.5, 32) GeV photons arriving at t similar to (243, 256.3, 610.6, 3409.8, 34366.2) s after the trigger of Fermi-GBM. Interestingly, the external inverse Compton scattering of the prompt emission (the second episode, i.e., t similar to 120-260 s) by the forward-shock-accelerated electrons is expected to produce a few gamma-rays at energies above 10 GeV, while five were detected in the same time interval. A possible unified model for the prompt soft gamma-ray, optical, and GeV emission of GRB 130427A, GRB 080319B, and GRB 090902B is outlined. Implications of the null detection of >1 TeV neutrinos from GRB 130427A by IceCube are discussed.

引用

页数：9

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