GRB 950830、GRB 090717A和GRB 200716C中微透镜的光曲线和硬度试验

Q1 Earth and Planetary Sciences

Monthly Notices of the Royal Astronomical Society: Letters Pub Date : 2023-10-04 DOI:10.1093/mnrasl/slad158

Oindabi Mukherjee, Robert Nemiroff

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引用次数: 0

摘要

单一伽马射线暴(GRB)的两个不同时间段必须在统计上相似才能显示内部引力透镜特征。这里定义并应用了两种直接的引力透镜测试:光曲线相似测试和硬度相似测试。据称，在几个单独的grb中发现了引力千禧年效应，这些grb包含两个被时间延迟隔开的发射事件。然而，我们的分析表明，这些说法都不符合这两个检验。对GRB 950830和GRB 090717A进行的硬度相似性测试发现，每个能量通道中第二和第一发射事件之间的比率与所有检测到的能量通道的平均相同比率在大约90%的置信水平上不同。此外，分别对GRB 950830、GRB 090717A和GRB 200716C进行的光曲线相似性测试发现，每个GRB中的两个发射事件不太可能来自该GRB的单个母发射事件，其差异分别在3.0σ、5.84σ和9.35σ置信水平上。

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Light Curve and Hardness Tests for Millilensing in GRB 950830, GRB 090717A, and GRB 200716C

ABSTRACT Two different temporal sections of a single gamma-ray burst (GRB) must be statistically similar to show an internal gravitational lensing signature. Here, two straightforward gravitational lensing tests are defined and applied: a light curve similarity test and a hardness similarity test. Gravitational millilensing has been claimed to be detected within several individual GRBs that contain two emission episodes separated by a time-delay. However, our analyses indicate that none of those claims satisfy both tests. The hardness similarity test performed on GRB 950830 and GRB 090717A found that the ratio between the second and the first emission episodes in each energy channel differed from the same ratio averaged over all detected energy channels at around 90 per cent confidence level. Also, a light curve similarity test performed on GRB 950830, GRB 090717A, and GRB 200716C separately found that it is unlikely that the two emission episodes in each GRB were drawn from a single parent emission episode for that GRB, with differences at the 3.0σ, 5.84σ, and 9.35σ confidence levels, respectively.

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来源期刊

Monthly Notices of the Royal Astronomical Society: Letters Earth and Planetary Sciences-Space and Planetary Science

CiteScore

8.80

自引率

0.00%

发文量

136

期刊介绍： For papers that merit urgent publication, MNRAS Letters, the online section of Monthly Notices of the Royal Astronomical Society, publishes short, topical and significant research in all fields of astronomy. Letters should be self-contained and describe the results of an original study whose rapid publication might be expected to have a significant influence on the subsequent development of research in the associated subject area. The 5-page limit must be respected. Authors are required to state their reasons for seeking publication in the form of a Letter when submitting their manuscript.