The Localization of the Single Pulse in VLBI Observation

doi:10.3847/1538-3881/ab09f5

CORC > 上海天文台 > 中国科学院上海天文台

	The Localization of the Single Pulse in VLBI Observation
	Liu,Lei 1,2; Jiang,Wu 1; Zheng,Weimin 1,2,3; Yan,Zhen 1,2; Zhang,Juan 1,2; Ma,Maoli 1,2; Luo,Wentao 4
刊名	The Astronomical Journal
	2019-03-12
卷号	157 期号:4
关键词	methods: data analysis pulsars: general radio continuum: general techniques: interferometric
ISSN号	0004-6256
DOI	10.3847/1538-3881/ab09f5
英文摘要	Abstract In our previous work, we proposed a cross spectrum–based method to extract single-pulse signals from RFI-contaminated data, which is originated from geodetic VLBI postprocessing. This method fully utilizes fringe-phase information of the cross spectrum and hence maximizes the signal power. However, the localization was not discussed in that work. As the continuation of that work, in this paper, we further study how to localize single pulses using an astrometric solving method. Assuming that the burst is a point source, we derive the burst position by solving a set of linear equations given the relation between the residual delay and the offset to a priori position. We find that the single-pulse localization results given by both astrometric solving and radio imaging are consistent within the 3σ level. Therefore, we claim that it is possible to derive the position of a single pulse with reasonable precision based on only three or even two baselines with 4 ms integration. The combination of cross spectrum–based detection and the localization proposed in this work then provide a thorough solution for searching for single pulses in VLBI observation. According to our calculation, our pipeline gives comparable accuracy to the radio imaging pipeline. Moreover, the computational cost of our pipeline is much smaller, which makes it more practical for a fast radio burst (FRB) search in regular VLBI observation. The pipeline is now publicly available and named the VLBI Observation for FRB Localization Keen Searcher (VOLKS).
语种	英语
出版者	The American Astronomical Society
WOS记录号	IOP:0004-6256-157-4-AB09F5
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/31873]
专题	中国科学院上海天文台
作者单位	1.Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, People’s Republic of China; liulei@shao.ac.cn 2.Key Laboratory of Radio Astronomy, Chinese Academy of Sciences, Nanjing 210008, People’s Republic of China 3.Shanghai Key Laboratory of Space Navigation and Positioning Techniques, Shanghai 200030, People’s Republic of China 4.Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU, WPI), University of Tokyo, Chiba 277-8582, Japan
推荐引用方式 GB/T 7714	Liu,Lei,Jiang,Wu,Zheng,Weimin,et al. The Localization of the Single Pulse in VLBI Observation[J]. The Astronomical Journal,2019,157(4).
APA	Liu,Lei.,Jiang,Wu.,Zheng,Weimin.,Yan,Zhen.,Zhang,Juan.,...&Luo,Wentao.(2019).The Localization of the Single Pulse in VLBI Observation.The Astronomical Journal,157(4).
MLA	Liu,Lei,et al."The Localization of the Single Pulse in VLBI Observation".The Astronomical Journal 157.4(2019).