论文标题
与Aartfaac的PSR B0950+08的极端巨型脉冲的长期研究
Long-term study of extreme giant pulses from PSR B0950+08 with AARTFAAC
论文作者
论文摘要
我们报告了从最古老的脉冲星之一的极端巨型脉冲（GP）的检测，即高度可变的PSR B0950+08，其中是阿姆斯特丹 - 阿斯特龙无线电瞬态瞬态和分析中心（AARTFAAC），这是一种并行瞬态检测仪器，作为低频阵列（Lofar）的子系统。在一秒钟的快照图像中检测到了我们北半球的低频无线电瞬变调查期间，有275张脉冲的样品，其脉冲范围为42至177 kJy MS。最亮的脉冲比先前在42和74 MHz时报道的脉冲更明亮，与先前长期研究中在103 MHz的长期研究中观察到的水平相当。迄今为止，他们的速率和通量分布之间的分布都不同。 GP速率是高度可变的，从每小时0到30，只有两个三小时的观测值占调查96 h的脉冲的近一半。它在几个小时的观察过程中并没有很大差异，但是从一天到下一个可以差异很大。这些光谱看起来强烈且构成多样性，发射有时局限于单个195.3 kHz子带，并且脉冲光谱在10分钟的时间表上发生变化。
We report on the detection of extreme giant pulses (GPs) from one of the oldest-known pulsars, the highly variable PSR B0950+08, with the Amsterdam-ASTRON Radio Transient Facility And Analysis Centre (AARTFAAC), a parallel transient detection instrument operating as a subsystem of the LOw Frequency ARray (LOFAR). During processing of our Northern Hemisphere survey for low-frequency radio transients, a sample of 275 pulses with fluences ranging from 42 to 177 kJy ms were detected in one-second snapshot images. The brightest pulses are an order of magnitude brighter than those previously reported at 42 and 74 MHz, on par with the levels observed in a previous long-term study at 103 MHz. Both their rate and fluence distribution differ between and within the various studies done to date. The GP rate is highly variable, from 0 to 30 per hour, with only two three-hour observations accounting for nearly half of the pulses detected in the 96 h surveyed. It does not vary significantly within a few-hour observation, but can vary strongly one from day to the next. The spectra appear strongly and variably structured, with emission sometimes confined to a single 195.3 kHz subband, and the pulse spectra changing on a timescale of order 10 min.
