ALFABURST: a commensal search for fast radio bursts with Arecibo
ALFABURST: a commensal search for fast radio bursts with Arecibo
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DOI：
10.1093/mnras/stx3038
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发表时间：
2017-10
影响因子：
4.8
通讯作者：
G. Foster;A. Karastergiou;Golnoosh Golpayegani;M. Surnis;D. Lorimer;J. Chennamangalam;M. Mclaughlin;W. Armour;J. Cobb;D. MacMahon;X. Pei;K. Rajwade;A. Siemion;D. Werthimer;Christopher Williams
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作者：
G. Foster;A. Karastergiou;Golnoosh Golpayegani;M. Surnis;D. Lorimer;J. Chennamangalam;M. Mclaughlin;W. Armour;J. Cobb;D. MacMahon;X. Pei;K. Rajwade;A. Siemion;D. Werthimer;Christopher Williams
自2015年7月以来，ALFABURST一直在与阿雷西博天文台使用阿雷西博L频段馈电阵列接收器的其他项目共同搜索快速射电暴(FRB)。我们描述了从那时到2017年8月没有探测到任何FRB的观测系统和报告，总观测时间为518小时。按照目前的FRB速率模型，加上望远镜灵敏度和光束大小的测量，我们估计这次调查探测到的红移约为3.4，有效测量量约为60万MPC 3。基于这一点，我们预计，在99%的置信度水平下，最多会看到两个金融稳定机构。我们在其他望远镜的结果和我们的搜索管道的限制的背景下讨论了这种未检测到的含义。在调查期间，探测到了17颗已知脉冲星的单个脉冲。我们还报告了一个脉冲宽度为3ms，色散测量为281pC cm-3的银河系射电瞬变的发现，它是在望远镜在场间旋转时探测到的。
ALFABURST has been searching for fast radio bursts (FRBs) commensally with other projects using the Arecibo L-band Feed Array receiver at the Arecibo Observatory since 2015 July. We describe the observing system and report on the non-detection of any FRBs from that time until 2017 August for a total observing time of 518 h. With current FRB rate models, along with measurements of telescope sensitivity and beam size, we estimate that this survey probed redshifts out to about 3.4 with an effective survey volume of around 600 000 Mpc 3 . Based on this, we would expect, at the 99 per cent confidence level, to see at most two FRBs. We discuss the implications of this non-detection in the context of results from other telescopes and the limitation of our search pipeline. During the survey, single pulses from 17 known pulsars were detected. We also report the discovery of a Galactic radio transient with a pulse width of 3 ms and dispersion measure of 281 pc cm -3 , which was detected while the telescope was slewing between fields.