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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Time-Resolved Spectral Variability of the Prompt Emission from GRB 070125 Observed with Suzaku/WAM
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Time-Resolved Spectral Variability of the Prompt Emission from GRB 070125 Observed with Suzaku/WAM

机译：Suzaku / WAM观测到的GRB 070125的即时发射的时间分辨光谱变异性

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摘要

Time-resolved spectral analyses of GRB 070125 with significant photon detections over the MeV regime using Suzaku/WAM data are reported. The prompt emission interval was divided into 10 time regions, and their spectra were reproduced by a Band function or a cutoff power-law model. The spectra show a complex evolution; a soft-hard-soft trend is seen, rather than a typical hard-to-soft monotonic variation. In addition, a flat spectral slope in the low-energy band exceeding the slope expected from a simple synchrotron emission model is suggested in one of the time regions. These results imply that the internal shocks in the relativistic jet of GRB 070125 have different physical conditions. There is a possible excess at ～ 2.2 MeV in the spectrum of 33 seconds after the trigger at a significant level of ≈ 98.5%, where the continuum spectrum is not reproduced by the Band function. These properties are only shown during the short prompt time interval of the prompt emission, and emphasize the utility of the Suzaku/WAM for the study of gamma-ray bursts.
机译：报告了使用Suzaku / WAM数据在MeV范围内对GRB 070125进行了时间分辨的光谱分析，并进行了重大的光子检测。迅速的发射间隔被分为10个时间区域，其光谱通过Band函数或截止幂律模型进行再现。光谱显示出复杂的变化。可以看到软硬相间的趋势，而不是典型的硬相间单调变化。另外，建议在一个时间区域中，低能带中的平坦光谱斜率超过简单同步加速器发射模型所预期的斜率。这些结果表明GRB 070125相对论射流中的内部冲击具有不同的物理条件。触发后33秒的光谱中，在〜2.2 MeV处可能存在过量，≈≈98.5％，显着水平，其中Band函数无法再现连续光谱。这些属性仅在瞬态发射的短瞬态时间间隔内显示，并强调了Suzaku / WAM在研究伽马射线暴中的实用性。

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