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Large High-precision X-Ray Timing of Three Millisecond Pulsars with NICER: Stability Estimates and Comparison with Radio

文献类型：期刊论文

作者Deneva, J. S.3,4; Ray, P. S.5; Lommen, A.6; Ransom, S. M.7; Bogdanov, S.8; Kerr, M.5; Wood, K. S.4,9; Arzoumanian, Z.10; Blacks, K.2; Doty, J.11
刊名ASTROPHYSICAL JOURNAL
出版日期2019-04-01
卷号874期号:2页码:13
ISSN号0004-637X
关键词pulsars: general pulsars: individual (PSR B1821-24, PSR B1937+21, PSR J0218+4232) stars: neutron
DOI10.3847/1538-4357/ab0966
英文摘要The Neutron Star Interior Composition Explorer (NICER) is an X-ray astrophysics payload on the International Space Station. It enables unprecedented high-precision timing of millisecond pulsars (MSPs) without the pulse broadening and delays due to dispersion and scattering within the interstellar medium that plague radio timing. We present initial timing results from a year of data on the MSPs PSR B1937+21 and PSR J0218+4232, and nine months of data on PSR B1821-24. NICER time-of-arrival uncertainties for the three pulsars are consistent with theoretical lower bounds and simulations based on their pulse shape templates and average source and background photon count rates. To estimate timing stability, we use the sigma(z) measure, which is based on the average of the cubic coefficients of polynomial fits to subsets of timing residuals. So far we are achieving timing stabilities sigma(z) approximate to 3 x 10(-14) for PSR B1937+21 and on the order of 10 (-12) for PSRs B1821-24 and J0218+4232. Within the span of our NICER data we do not yet see the characteristic break point in the slope of sigma(z); detection of such a break would indicate that further improvement in the cumulative root-mean-square timing residual is limited by timing noise. We see this break point in our comparison radio data sets for PSR B1821-24 and PSR B1937+21 on timescales of 2 yr.
WOS关键词PSR J0218+4232 ; B1821-24 ; PACKAGE ; PULSES ; TEMPO2 ; SHAPE
资助项目NASA through the NICER mission ; Astrophysics Explorers Program ; NASA[DPR.S-15633-Y] ; NSF Physics Frontiers Center[1430284] ; NSERC Discovery Grant ; Canadian Institute for Advanced Research ; CAS Pioneer Hundred Talents Program ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB23000000]
WOS研究方向Astronomy & Astrophysics
语种英语
出版者IOP PUBLISHING LTD
WOS记录号WOS:000463385000008
资助机构NASA through the NICER mission ; NASA through the NICER mission ; Astrophysics Explorers Program ; Astrophysics Explorers Program ; NASA ; NASA ; NSF Physics Frontiers Center ; NSF Physics Frontiers Center ; NSERC Discovery Grant ; NSERC Discovery Grant ; Canadian Institute for Advanced Research ; Canadian Institute for Advanced Research ; CAS Pioneer Hundred Talents Program ; CAS Pioneer Hundred Talents Program ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; NASA through the NICER mission ; NASA through the NICER mission ; Astrophysics Explorers Program ; Astrophysics Explorers Program ; NASA ; NASA ; NSF Physics Frontiers Center ; NSF Physics Frontiers Center ; NSERC Discovery Grant ; NSERC Discovery Grant ; Canadian Institute for Advanced Research ; Canadian Institute for Advanced Research ; CAS Pioneer Hundred Talents Program ; CAS Pioneer Hundred Talents Program ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; NASA through the NICER mission ; NASA through the NICER mission ; Astrophysics Explorers Program ; Astrophysics Explorers Program ; NASA ; NASA ; NSF Physics Frontiers Center ; NSF Physics Frontiers Center ; NSERC Discovery Grant ; NSERC Discovery Grant ; Canadian Institute for Advanced Research ; Canadian Institute for Advanced Research ; CAS Pioneer Hundred Talents Program ; CAS Pioneer Hundred Talents Program ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; NASA through the NICER mission ; NASA through the NICER mission ; Astrophysics Explorers Program ; Astrophysics Explorers Program ; NASA ; NASA ; NSF Physics Frontiers Center ; NSF Physics Frontiers Center ; NSERC Discovery Grant ; NSERC Discovery Grant ; Canadian Institute for Advanced Research ; Canadian Institute for Advanced Research ; CAS Pioneer Hundred Talents Program ; CAS Pioneer Hundred Talents Program ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences
源URL[http://ir.bao.ac.cn/handle/114a11/25985]  
专题中国科学院国家天文台
通讯作者Deneva, J. S.
作者单位1.NASA, Marshall Space Flight Ctr, Astrophys Branch ST12, Huntsville, AL 35812 USA
2.NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
3.George Mason Univ, Fairfax, VA 22030 USA
4.Naval Res Lab, Washington, DC 20375 USA
5.US Naval Res Lab, Washington, DC 20375 USA
6.Haverford Coll, Haverford, PA 19041 USA
7.Natl Radio Astron Observ, Charlottesville, VA USA
8.Columbia Univ, Columbia Astrophys Lab, 538 W 120th St, New York, NY 10027 USA
9.Praxis, Princeton, NJ USA
10.NASA, Goddard Space Flight Ctr, Xray Astrophys Lab, Greenbelt, MD 20771 USA
推荐引用方式
GB/T 7714		 Deneva, J. S.,Ray, P. S.,Lommen, A.,et al. Large High-precision X-Ray Timing of Three Millisecond Pulsars with NICER: Stability Estimates and Comparison with Radio[J]. ASTROPHYSICAL JOURNAL,2019,874(2):13.
APA Deneva, J. S..,Ray, P. S..,Lommen, A..,Ransom, S. M..,Bogdanov, S..,...&Zhu, W. W..(2019).Large High-precision X-Ray Timing of Three Millisecond Pulsars with NICER: Stability Estimates and Comparison with Radio.ASTROPHYSICAL JOURNAL,874(2),13.
MLA Deneva, J. S.,et al."Large High-precision X-Ray Timing of Three Millisecond Pulsars with NICER: Stability Estimates and Comparison with Radio".ASTROPHYSICAL JOURNAL 874.2(2019):13.

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