乌鲁木齐25-m radio telescope 1540 MHz探测PSR B0656 +14强脉冲的研究
A study of strong pulses detected from PSR B0656+14 using Urumqi 25-m radio telescope at 1540MHz
摘要：
利用乌鲁木齐25米射电望远镜2007年8月至2010年9月1540 MHz的观测数据，分析了PSR B 0656 +14强脉冲的性质。在44小时的观测数据中，共检测到67个脉冲的信噪比高于5 σ阈值。这些脉冲的峰值通量密度是平均轮廓的58至194倍，并且它们的脉冲能量是平均脉冲的3至68倍。这些脉冲聚集在平均轮廓的峰值之前约5度的相位周围。与平均轮廓宽度相比，它们相对较窄，半峰全宽范围为0.28 - 1.78度。脉冲的脉冲能量的分布遵循对数正态分布。从PSR B 0656 +14中探测到的这些偶发强脉冲在性质上不同于典型的巨脉冲，也不同于它的规则脉冲。
英文摘要：
We report on the properties of strong pulses from PSR B0656+14 by analyzing the data obtained using Urumqi 25-m radio telescope at 1540 MHz from August 2007 to September 2010. In 44 hrs of observational data, a total of 67 pulses with signal-to-noise ratios above a 5-σ threshold were detected. The peak flux densities of these pulses are 58 to 194 times that of the average profile, and the pulse energies of them are 3 to 68 times that of the average pulse. These pulses are clustered around phases about 5 degrees ahead of the peak of the average profile. Comparing with the width of the average profile, they are relatively narrow, with the full widths at half-maximum range from 0.28 to 1.78 degrees. The distribution of pulse-energies of the pulses follows a lognormal distribution. These sporadic strong pulses detected from PSR B0656+14 are different in character from the typical giant pulses, and from its regular pulses.
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