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Pulsar timing at Urumqi Astronomical Observatory: observing system and results
Wang, N1,2,3; Manchester, RN2; Zhang, J1; Wu, XJ3; Yusup, A1; Lyne, AG4; Cheng, KS5; Chen, MZ1
2001-12-11
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume328Issue:3Pages:855-866
Contribution Rank1
Abstract

A pulsar timing system has been operating in the 18-cm band at the Urumqi Astronomical Observatory 25-m telescope since mid-1999. Frequency resolution allowing de-dispersion of the pulsar signals is provided by a 2 x 128 x 2.5 MHz filterbank/digitizer system. Observations of 74 pulsars over more than 12 months have resulted in updated pulsar periods and period derivatives, as well as improved positions. Comparison with previous measurements showed that the changes in period and period derivative tend to have the same sign and to be correlated in amplitude. A model based on unseen glitches gives a good explanation of the observed changes, suggesting that long-term fluctuations in period and period derivatives are dominated by glitches. In 2000 July, we detected a glitch of relative amplitude Deltav/v similar to 24 x 10(-9) in the Crab pulsar. The post-glitch decay appears similar to other large Crab glitches.

Correspondent Emailna.wang@xao.ac.cn
KeywordAstronomical Data Bases : Miscellaneous Pulsars : General
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
Indexed BySCI
Language英语
WOS KeywordImproved Parameters ; Proper Motions ; Glitches ; Young
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000172925600018
Citation statistics
Cited Times:50[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.xao.ac.cn/handle/45760611-7/856
Collection射电天文研究室_脉冲星研究团组
中国科学院新疆天文台
射电天文研究室
其它
Corresponding AuthorWang, N
Affiliation1.CAS, Natl Astron Observ, Urumqi 830011, Peoples R China
2.CSIRO, Australia Telescope Natl Facil, Epping, NSW 1710, Australia
3.Peking Univ, Dept Astron, Beijing 100871, Peoples R China
4.Univ Manchester, Jodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, England
5.Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China
First Author AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
Corresponding Author AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Wang, N,Manchester, RN,Zhang, J,et al. Pulsar timing at Urumqi Astronomical Observatory: observing system and results[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2001,328(3):855-866.
APA Wang, N.,Manchester, RN.,Zhang, J.,Wu, XJ.,Yusup, A.,...&Chen, MZ.(2001).Pulsar timing at Urumqi Astronomical Observatory: observing system and results.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,328(3),855-866.
MLA Wang, N,et al."Pulsar timing at Urumqi Astronomical Observatory: observing system and results".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 328.3(2001):855-866.
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