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arXiv 1002.2977astro-ph.GA
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费米大面积望远镜对PSR J1836 +5925的观测

Fermi Large Area Telescope observations of PSR J1836+5925

The Fermi LAT Collaboration

摘要:

伽马射线脉冲星PSR J1836+5925的发现,为之前未被确认的EGRET源3EG J1835+5918提供动力,是费米大面积望远镜(LAT)的早期成就之一。PSR J 1836 +5925位于银河平面25度,是一颗173毫秒的脉冲星,特征年龄为180万年,自旋光度为1.1 $\times10^{34}$ erg s $^{-1}$,并且有很大的离峰发射分量,这使得它在已知的伽马射线脉冲星中非常不寻常。我们提出了一年的LAT数据的分析,包括更新的时间解决方案,详细的光谱结果和长期的光变曲线显示没有变化的迹象。没有证据表明周围有脉冲星风星云,离峰发射的光谱特征表明它可能是磁层。最近的XMM观测的X射线对应物的分析产生了一个详细的表征其光谱,其中,像Geminga,是一致的中子星,显示出磁层和热发射的证据。

英文摘要:

The discovery of the gamma-ray pulsar PSR J1836+5925, powering the formerly unidentified EGRET source 3EG J1835+5918, was one of the early accomplishments of the Fermi Large Area Telescope (LAT). Sitting 25 degrees off the Galactic plane, PSR J1836+5925 is a 173 ms pulsar with a characteristic age of 1.8 million years, a spindown luminosity of 1.1$\times10^{34}$ erg s$^{-1}$, and a large off-peak emission component, making it quite unusual among the known gamma-ray pulsar population. We present an analysis of one year of LAT data, including an updated timing solution, detailed spectral results and a long-term light curve showing no indication of variability. No evidence for a surrounding pulsar wind nebula is seen and the spectral characteristics of the off-peak emission indicate it is likely magnetospheric. Analysis of recent XMM observations of the X-ray counterpart yields a detailed characterization of its spectrum, which, like Geminga, is consistent with that of a neutron star showing evidence for both magnetospheric and thermal emission.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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