OBSERVATIONS OF ROTATING RADIO TRANSIENTS WITH THE FIRST STATION OF THE LONG WAVELENGTH ARRAY
OBSERVATIONS OF ROTATING RADIO TRANSIENTS WITH THE FIRST STATION OF THE LONG WAVELENGTH ARRAY
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DOI：
10.3847/0004-637x/831/2/140
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发表时间：
2010-09
期刊：
影响因子：
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通讯作者：
P. Henning;S. Ellingson;G. Taylor;J. Craig;Y. Pihlstrom;L. Rickard;T. Clarke;N. Kassim;A. Cohen
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文献类型：
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作者：
P. Henning;S. Ellingson;G. Taylor;J. Craig;Y. Pihlstrom;L. Rickard;T. Clarke;N. Kassim;A. Cohen
旋转射电瞬变（rrat）是脉冲星的一个子类，于2006年首次被发现，只能通过搜索单脉冲而不是通过平均时间发射来检测。本文介绍了利用长波阵列（LWA1）第一站在30 ~ 88 MHz频率范围内对19个rrat的观测结果。这里观察到的rrat是在高频脉冲星调查中首次发现的。在观察到的19个rrat中，检测到两个源，报告了它们的色散测量、周期、脉冲分布和通量密度，并与先前的更高频率测量进行了比较。我们发现LWA1的探测率很低（11%），这可能是由于与高频望远镜相比，LWA1的灵敏度较低，以及星际介质散射或光谱转换的结果。
Rotating radio transients (RRATs) are a subclass of pulsars first identified in 2006 that are detected only in searches for single pulses and not through their time averaged emission. Here, we present the results of observations of 19 RRATs using the first station of the Long Wavelength Array (LWA1) at frequencies between 30 and 88 MHz. The RRATs observed here were first detected in higher frequency pulsar surveys. Of the 19 RRATs observed, two sources were detected and their dispersion measures, periods, pulse profiles, and flux densities are reported and compared to previous higher frequency measurements. We find a low detection rate (11%), which could be a combination of the lower sensitivity of LWA1 compared to higher frequency telescopes, and the result of scattering by the interstellar medium or a spectral turnover.