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首页> 外文期刊>The Astrophysical journal >THE MAIN CHARACTERISTICS OF GRO J1744-28 OBSERVED BY THE PROPORTIONAL COUNTER ARRAY EXPERIMENT ON THE ROSSI X-RAY TIMING EXPLORER
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THE MAIN CHARACTERISTICS OF GRO J1744-28 OBSERVED BY THE PROPORTIONAL COUNTER ARRAY EXPERIMENT ON THE ROSSI X-RAY TIMING EXPLORER

机译：在ROSSI X射线时间探测仪上进行比例反矩阵实验观察到的GRO J1744-28的主要特征。

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摘要

In this Letter, we provide an introduction to the main features seen in a series of observations of the bursting pulsar GRO J1744-28. The observations were made from 1996 January through May with the proportional counter array on the Rossi X-Ray Timing Explorer spacecraft. In the 2-10 keV band, GRO J1744-28 emitted large bursts of ～10 s duration at a rate of about 2 per hour. The peak flux during these bursts was ～6-40 times greater than that in the quiescent, or nonbursting, periods. For the earliest bursts, the inferred peak luminosity approaches 100 times the Eddington limit, which is suggestive of some kind of beaming mechanism. A range of smaller bursts and quasi-periodic oscillation features were also seen. All this activity was superposed on an almost perfect sinusoidal modulation at a frequency of 2.14 Hz with an amplitude of ～10% of the nonbursting flux. The source's persistent flux declined in a roughly linear trend from late January until mid-May, by which time its intensity was confused with several other sources.
机译：在这封信中，我们提供了对脉冲星GRO J1744-28的一系列观测中看到的主要特征的介绍。这些观测是从1996年1月至5月在Rossi X射线定时探测器航天器上使用比例计数器阵列进行的。在2-10 keV波段，GRO J1744-28发出了约10 s持续时间的大脉冲，速率约为每小时2个。这些爆发期间的峰值通量比静止或非爆发时期的峰值通量大约6-40倍。对于最早的爆发，推断出的峰值光度接近爱丁顿极限的100倍，这暗示了某种光束的机制。还可以看到一系列较小的脉冲和准周期振荡特征。所有这些活动都叠加在一个几乎完美的正弦调制上，其频率为2.14 Hz，幅度为非突发通量的〜10％。从1月下旬到5月中旬，该源的持续通量呈大致线性趋势下降，这时其强度与其他几个源混淆了。

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