ROSAT High Resolution Imager observations of PSR 0656 + 14

ROSAT High Resolution Imager observations of PSR 0656 + 14
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ROSAT 高分辨率成像仪对 PSR 0656 14 的观测

DOI:
10.1086/173128
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发表时间:
1993
期刊:
影响因子:
--
通讯作者:
R. J., Jr. Thompson
R. J., Jr. Thompson
中科院分区:
--
文献类型:
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作者:
S. B. Anderson;F. A. Cordova;G. Pavlov;C. Robinson;R. J., Jr. Thompson

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我们使用 ROSAT 上的高分辨率成像仪 (HRI) 以软 X 射线能量对 PSR 0656 + 14 进行成像。净观测时间为 10,326 秒,我们获得的源事件率为 0.382 +/- 0.007 计数/秒。将这些计数在 15 到 100 角秒之间的径向分布与 HRI 软源的经验推导的点扩散函数进行比较,我们发现没有证据表明空间扩展的 X 射线星云达到 1.67 x 10 exp -6 计数/秒/平方弧秒的极限表面亮度,对应于 100 角秒半径内观测到的通量的 14% 的限制。脉冲星的 X 射线发射以射电脉冲星的 0.385 秒周期发出脉冲,脉冲分数为 7 +/- 2.2%,半高宽为 0.10 秒。我们讨论了一些与 HRI 和 PSPC 结果兼容的 PSR 0656 + 14 X 射线辐射模型。
We have used the High Resolution Imager (HRI) on ROSAT to image PSR 0656 + 14 at soft X-ray energies. With a net observing time of 10,326 s, we obtained a source event rate of 0.382 +/- 0.007 counts/s. Comparing the radial distribution of these counts between 15 and 100 arcsec to an empirically derived point spread function for HRI soft sources, we find no evidence of a spatially extended X-ray nebula to a limiting surface brightness of 1.67 x 10 exp -6 counts/s/sq arcsec, corresponding to a limit of 14 percent of the observed flux out to a radius of 100 arcsec. The X-ray emission of the pulsar is pulsed at the 0.385 s period of the radio pulsar, with a pulse fraction of 7 +/- 2.2 percent and a FWHM of 0.10 s. We discuss some models of the X-ray radiation of PSR 0656 + 14 compatible with both the HRI and PSPC results.