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arXiv 1310.8076astro-ph.HEastro-ph.GAastro-ph.IM
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PSR B0823 +26的闪烁观测

Scintillation observations of PSR B0823+26

M. Daszuta, W. Lewandowski, J. Kijak

摘要:

我们目前的星际闪烁PSR B0823+26的分析结果。使用托伦天文学中心32米射电望远镜以1.7千兆赫的频率进行了观测。2003年至2006年期间,进行了50多次观察会议,平均持续10小时。通过动态谱分析和流密度变化的结构函数分析,得到了星际闪烁参数。我们确定了两个不同的时间尺度,我们认为这是衍射和折射闪烁的时间尺度。结果表明,在给定频率下,PSR B 0823 +26的衍射时间尺度为$τ_{diss} = 19.3^{+1.7}_{-1.6}$ min,折射时间尺度为$τ_{riss} = 144 \pm 23$ min,解相关带宽为$B_{iss} = 81 \pm 3$ MHz.

英文摘要:

We present results of the analysis of interstellar scintillation in PSR B0823+26. Observations were conducted at a frequency of 1.7 GHz using the 32-m Torun Centre for Astronomy radio telescope. More than 50 observing sessions, lasting on average 10 h, were conducted between 2003 and 2006. We found interstellar scintillation parameters by means of dynamic spectrum analysis as well as structure function analysis of the flux density variations. We identified two distinctive time-scales, which we believe to be the time-scales of diffractive and refractive scintillation. Our results show that at the given frequency the diffractive time-scale in PSR B0823+26 is $τ_{diss} = 19.3^{+1.7}_{-1.6}$ min, the refractive time-scale is $τ_{riss} = 144 \pm 23$ min and the decorrelation bandwidth is $B_{iss} = 81 \pm 3$ MHz.

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