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首页> 外文期刊>The Astrophysical Journal. Letters >Rapid gamma-ray flux variability during the 2013 march crab nebula flare
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Rapid gamma-ray flux variability during the 2013 march crab nebula flare

机译:2013年3月蟹状星云爆发期间伽马射线通量快速变化

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摘要

We report on a bright flare in the Crab Nebula detected by the Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope. The period of significantly increased luminosity occurred in 2013 March and lasted for approximately two weeks. During this period, we observed flux variability on timescales of approximately 5 hr. The combined photon flux above 100 MeV from the pulsar and its nebula reached a peak value of (12.5 ± 0.8) · 10~(-6) cm~(-2) s~(-1) on 2013 March 6. This value exceeds the average flux by almost a factor of six and implies a ~20 times higher flux for the synchrotron component of the nebula alone. This is the second brightest flare observed from this source. Spectral and temporal analysis of the LAT data collected during the outburst reveal a rapidly varying synchrotron component of the Crab Nebula while the pulsar emission remains constant in time.
机译:我们报道了费米伽马射线太空望远镜上的大面积望远镜(LAT)探测到的蟹状星云明亮耀斑。发光度显着增加的时期发生在2013年3月,持续了大约两周。在此期间,我们在大约5小时的时间尺度上观察到通量变化。来自脉冲星及其星云的100 MeV以上的组合光子通量在2013年3月6日达到(12.5±0.8)·10〜(-6)cm〜(-2)s〜(-1)的峰值。平均通量几乎增加了六倍,这意味着单独的星云同步加速器通量要高出约20倍。这是从该光源观察到的第二个最明亮的耀斑。爆发期间收集的LAT数据的频谱和时间分析表明,蟹状星云的同步加速器分量迅速变化,而脉冲星的发射却保持时间恒定。

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