论文标题
从$+42^o $降至$+52^o $的脉冲信号的检测统计量为111 MHz
Detection Statistics of Pulse Signals at Declinations from $+42^o$ to $+52^o$ at the Frequency 111 MHz
论文作者
论文摘要
在监视程序中包含的新天空区域中搜索脉冲信号，以搜索脉冲星和瞬变。在六个频道中记录的几个月数据的处理，总带宽为2.5 MHz，表明，在24个连接的固定梁中，每小时平均每小时观察到4个脉冲。在这些脉冲中，有18.3％与脉冲星相似。它们在一个或两个相邻的光束中可见，并且具有明显的色散偏移，也就是说，它们首先以高频率记录，然后在低频下记录，这表明信号可能通过星际介质通过。此类检测到的脉冲中几乎有68％属于六个已知的脉冲星，其分散度量为9至141 $ PC/cm^3 $，几乎所有其余的脉冲都是未知性质的噪声，或者是拟议的脉冲分离技术的噪声。对3650个明显脉冲脉冲的选定阵列的进一步研究显示，属于四个旋转无线电瞬变（RRAT）的13个脉冲。他们的分散措施在17-51 $ PC/cm^3 $的范围内。使用121天内求和的功率谱进行了搜索常规（周期性）RRAT排放。未检测到周期性辐射，但对于两个RRAT，从脉冲之间的时间间隔的测量值获得了周期的上限。检测到的RRAT的集成通量密度的上部估计值在111 MHz的频率为2-4 MJY范围内。
A search for pulse signals was carried out in a new sky area included in the monitoring program for the search for pulsars and transients. Processing of several months data recorded in six frequency channels with a total bandwidth of 2.5 MHz showed that, on average, 4 pulses per hour are observed in each of the 24 connected stationary beams. Of these pulses, 18.3% are similar to those of pulsars. They are visible in one or two neighboring beams and have a pronounced dispersion shift, that is, they are recorded first at a high and then at a low frequency, which indicates the possible passage of the signal through the interstellar medium. Almost 68% of such detected pulses belong to six known pulsars with dispersion measures from 9 to 141 $pc/cm^3$, and almost all of the remaining pulses are either noise of an unknown nature or artifacts of the proposed pulse separation technique. An additional study of the selected array of 3650 obvious pulsar pulses revealed 13 pulses belonging to four rotating radio transients (RRATs). Their dispersion measures are in the range of 17-51 $pc/cm^3$. A search for regular (periodic) RRAT emission was carried out using power spectra summed over 121 days. Periodic radiation was not detected, but for two RRATs, upper estimates of the periods were obtained from measurements of the time intervals between pulses. The upper estimates of the integrated flux density of the detected RRATs are in the range 2-4 mJy at the frequency 111 MHz.
