Properties of GRB High-Energy Gamma Rays from Fermi/LAT, CORONAS-F/AVS-F, and PHOTON/NATALYA-2M Data

IF 0.48 Q4 Physics and Astronomy

Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-07-15 DOI:10.1134/S1062873825711389

I. V. Arkhangelskaja, A. I. Arkhangelskiy

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Abstract

The AVS-F catalog contains several dozen γ-ray bursts (GRBs), the NATALYA-2M consists of 6 bursts (maximum photon energies ∼150 and ∼60 MeV, respectively), and the Fermi/LAT catalog contains more than 200 bursts in the range E > 100 MeV. Different behavior of the prompt emission time profiles is observed in the high and low energy ranges during some events with a high-energy spectral component. When using parameter R_t (the ratio of the time of arrival of γ-photons with maximum energy to the duration of a burst), which does not require considering the cosmological length of dilation, the following groups can be distinguished among long bursts: (1) For ∼25% of all GRBs, the duration of high-energy emission is shorter than that of the low-energy range. (2) The opposite situation is observed for the remaining ∼75%, but the maximum energy in γ-rays is detected during (2a) a low-energy prompt emission or (2b) after it is complete. The characteristics of GRBs with γ-rays in the sub-TeV region are similar to types 2a and 2b, since there is no significant correlation between their maximum energies and redshifts.

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Fermi/LAT、CORONAS-F/AVS-F和PHOTON/NATALYA-2M数据的GRB高能伽马射线性质

AVS-F目录包含几十个γ射线爆发（grb）， NATALYA-2M由6个爆发组成（最大光子能量分别为~ 150和~ 60 MeV），费米/LAT目录包含200多个在E >； 100 MeV范围内的爆发。在一些具有高能光谱成分的事件中，在高能量和低能范围内观察到提示发射时间曲线的不同行为。当使用参数Rt（最大能量γ光子到达的时间与爆发持续时间之比）时，不需要考虑宇宙膨胀的长度，可以在长爆发中区分出以下几类：(1)对于所有grb的约25%，高能发射的持续时间短于低能范围。(2)其余75%的情况正好相反，但γ射线的最大能量是在（2a）低能快速发射或（2b）发射完成后探测到的。亚tev区域γ射线伽玛暴的特征与2a和2b类型相似，它们的最大能量与红移之间没有显著的相关性。

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来源期刊

Bulletin of the Russian Academy of Sciences: Physics Physics and Astronomy-Physics and Astronomy (all)

CiteScore

0.90

自引率

0.00%

发文量

251

期刊介绍： Bulletin of the Russian Academy of Sciences: Physics is an international peer reviewed journal published with the participation of the Russian Academy of Sciences. It presents full-text articles (regular, letters to the editor, reviews) with the most recent results in miscellaneous fields of physics and astronomy: nuclear physics, cosmic rays, condensed matter physics, plasma physics, optics and photonics, nanotechnologies, solar and astrophysics, physical applications in material sciences, life sciences, etc. Bulletin of the Russian Academy of Sciences: Physics focuses on the most relevant multidisciplinary topics in natural sciences, both fundamental and applied. Manuscripts can be submitted in Russian and English languages and are subject to peer review. Accepted articles are usually combined in thematic issues on certain topics according to the journal editorial policy. Authors featured in the journal represent renowned scientific laboratories and institutes from different countries, including large international collaborations. There are globally recognized researchers among the authors: Nobel laureates and recipients of other awards, and members of national academies of sciences and international scientific societies.