Limitations in timing precision due to single-pulse shape variability in millisecond pulsars

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	Limitations in timing precision due to single-pulse shape variability in millisecond pulsars
	Shannon, R. M.1; Oslowski, S.2,3; Dai, S.1,4; Bailes, M.5; Hobbs, G.1; Manchester, R. N.1; van Straten, W.5; Raithel, C. A.6; Ravi, V.1,7; Toomey, L.1
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2014-09-11
卷号	443 期号:2 页码:1463-1481
关键词	methods: data analysis stars: neutron pulsars: general
英文摘要	High-sensitivity radio-frequency observations of millisecond pulsars usually show stochastic, broad-band, pulse-shape variations intrinsic to the pulsar emission process. These variations induce jitter noise in pulsar timing observations; understanding the properties of this noise is of particular importance for the effort to detect gravitational waves with pulsar timing arrays. We assess the short-term profile and timing stability of 22 millisecond pulsars that are part of the Parkes Pulsar Timing Array sample by examining intraobservation arrival time variability and single-pulse phenomenology. In 7 of the 22 pulsars, in the band centred at approximately 1400 MHz, we find that the brightest observations are limited by intrinsic jitter. We find consistent results, either detections or upper limits, for jitter noise in other frequency bands. PSR J1909-3744 shows the lowest levels of jitter noise, which we estimate to contribute similar to 10 ns root mean square error to the arrival times for hour-duration observations. Larger levels of jitter noise are found in pulsars with wider pulses and distributions of pulse intensities. The jitter noise in PSR J0437-4715 decorrelates over a bandwidth of similar to 2 GHz. We show that the uncertainties associated with timing pulsar models can be improved by including physically motivated jitter uncertainties. Pulse-shape variations will limit the timing precision at future, more sensitive, telescopes; it is imperative to account for this noise when designing instrumentation and timing campaigns for these facilities.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	RADIO ASTRONOMICAL POLARIMETRY ; INTENSITY MODULATION ; GRAVITATIONAL-WAVES ; INTERSTELLAR PLASMA ; PSR J1022+1001 ; STABILITY ; LIMITS ; NOISE ; MHZ ; EMISSION
收录类别	SCI
语种	英语
WOS记录号	WOS:000340436800042
内容类型	期刊论文
源URL	[http://ir.xao.ac.cn/handle/45760611-7/601]
专题	脉冲星研究团组新疆天文台_射电天文研究室
作者单位	1.Australia Telescope Natl Facil, CSIRO Astron & Space Sci, Epping, NSW 1710, Australia 2.Max Planck Inst Radioastron, D-53121 Bonn, Germany 3.Univ Bielefeld, Dept Phys, D-33615 Bielefeld, Germany 4.Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China 5.Swinburne Univ Technol, Ctr Astrophys & Supercomp, Hawthorn, Vic 3122, Australia 6.Carleton Coll, Dept Phys, Northfield, MN 55057 USA 7.Univ Melbourne, Sch Phys, Parkville, Vic 3010, Australia 8.Curtin Univ, Int Ctr Radio Astron Res, Bentley, WA 6102, Australia 9.CALTECH, Dept Astron, Pasadena, CA 91125 USA 10.Univ Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA
推荐引用方式 GB/T 7714	Shannon, R. M.,Oslowski, S.,Dai, S.,et al. Limitations in timing precision due to single-pulse shape variability in millisecond pulsars[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2014,443(2):1463-1481.
APA	Shannon, R. M..,Oslowski, S..,Dai, S..,Bailes, M..,Hobbs, G..,...&Zhu, X. -J..(2014).Limitations in timing precision due to single-pulse shape variability in millisecond pulsars.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,443(2),1463-1481.
MLA	Shannon, R. M.,et al."Limitations in timing precision due to single-pulse shape variability in millisecond pulsars".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 443.2(2014):1463-1481.