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Measuring clock jumps using pulsar timing
Li ZX(李志玄)1,3,4; Lee, KeJia2; Caballero, Ricardo Nicolaos2; Xu YH(徐永华)1,3,4; Hao LF(郝龙飞)1,4; Wang M(汪敏)1,4; Wang JC(王建成)1,4
Source PublicationScience China: Physics, Mechanics and Astronomy
2020
Volume63Issue:1
DOI10.1007/s11433-019-9428-4
Contribution Rank第1完成单位
Indexed ByEI
Keywordpulsars time series analysis clocks and frequency standards
Abstract

In this paper, we investigate the statistical signal-processing algorithm to measure the instant local clock jump from the timing data of multiple pulsars. Our algorithm is based on the framework of Bayesian statistics. In order to make the Bayesian algorithm applicable with limited computational resources, we dedicated our efforts to the analytic marginalization of irrelevant parameters. We found that the widely used parameter for pulsar timing systematics, the "Efac" parameter, can be analytically marginalized. This reduces the Gaussian likelihood to a function very similar to the Student’s t-distribution. Our iterative method to solve the maximum likelihood estimator is also explained in the paper. Using pulsar timing data from the Yunnan Kunming 40-m radio telescope, we demonstrate the application of the method, where 80-ns level precision for the clock jump can be achieved. Such a precision is comparable to that of current commercial time transferring service using satellites. We expect that the current method could help developing the autonomous pulsar time scale.

Funding ProjectStrategic Priority Research Program of Chinese Academy of Sciences[XDB23010200] ; National Natural Science Foundation of China[U15311243] ; National Natural Science Foundation of China[11690024] ; National Basic Research Program of China[2015CB857101] ; funding from TianShanChuangXinTuanDui and the Max-Planck Partner Group
Funding OrganizationStrategic Priority Research Program of Chinese Academy of Sciences[XDB23010200] ; National Natural Science Foundation of China[U15311243, 11690024] ; National Basic Research Program of China[2015CB857101] ; funding from TianShanChuangXinTuanDui and the Max-Planck Partner Group
Language英语
Subject Area天文学 ; 射电天文学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeJournal article (JA)
PublisherScience in China Press
ISSN1674-7348
EI Accession Number20193507375459
EI KeywordsIterative Methods
EI Classification Number657.2extraterrestrial Physics And Stellar Phenomena - 713.4pulse Circuits - 716.1information Theory And Signal Processing - 921.6numerical Methods - 922statistical Methods - 922.2mathematical Statistics - 943.3special Purpose Instruments
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/20847
Collection射电天文研究组
中国科学院天体结构与演化重点实验室
Corresponding AuthorLee, KeJia
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences, Kunming, 650216, China
2.Kavli Institute for Astronomy and Astrophysics, Peking University, 100871, China
3.University of Chinese Academy of Sciences, Beijing, 100049, China
4.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming; 650216, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Li ZX,Lee, KeJia,Caballero, Ricardo Nicolaos,et al. Measuring clock jumps using pulsar timing[J]. Science China: Physics, Mechanics and Astronomy,2020,63(1).
APA Li ZX.,Lee, KeJia.,Caballero, Ricardo Nicolaos.,Xu YH.,Hao LF.,...&Wang JC.(2020).Measuring clock jumps using pulsar timing.Science China: Physics, Mechanics and Astronomy,63(1).
MLA Li ZX,et al."Measuring clock jumps using pulsar timing".Science China: Physics, Mechanics and Astronomy 63.1(2020).
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