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Brightness-independent Measurements of Gamma-Ray Burst Durations

机译:伽马射线爆裂持续时间的亮度独立测量

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摘要

We demonstrate that a brightness bias exists in the third BATSE catalog duration measurements of cosmic gamma-ray bursts. This bias, caused by the fact that the outlying emission from bright bursts is easier to detect than from dim bursts, is sufficient to obscure a time-dilation factor of order 2. To avoid this problem, we construct brightness-independent measures of duration and apply them to a sample of long bursts containing no known brightness biases. We render all bursts to the same signal-to-noise ratio level, and thereby miss comparable amounts of temporal structure in both dim and bright bursts.
机译:我们证明在宇宙伽马射线暴的第三次BATSE目录持续时间测量中存在亮度偏差。这种偏见是由明亮的突发比暗淡的突发更容易检测到的事实引起的,足以掩盖2阶的时间扩散因子。为避免此问题,我们构造了与亮度无关的持续时间和将它们应用于没有已知亮度偏差的长脉冲样本。我们将所有脉冲串渲染为相同的信噪比水平,从而在昏暗和明亮的脉冲串中都错过了相当数量的时间结构。

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