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From spin noise to systematics: stochastic processes in the first International Pulsar Timing Array data release
Lentati, L.1; Shannon, R. M.2,3; Coles, W. A.4; Verbiest, J. P. W.5,6; van Haasteren, R.7; Ellis, J. A.7; Caballero, R. N.6; Manchester, R. N.2; Arzoumanian, Z.8,9; Babak, S.10; Bassa, C. G.11; Bhat, N. D. R.3; Brem, P.10; Burgay, M.12; Burke-Spolaor, S.13; Champion, D.6; Chatterjee, S.14; Cognard, I.15,16; Cordes, J. M.14; Dai, S.2,17; Demorest, P.13; Desvignes, G.6; Dolch, T.14,18; Ferdman, R. D.19; Fonseca, E.20; Gair, J. R.21; Gonzalez, M. E.22; Graikou, E.6; Guillemot, L.15,16; Hessels, J. W. T.13,23; Hobbs, G.2; Janssen, G. H.11; Jones, G.24; Karuppusamy, R.6; Keith, M.25; Kerr, M.2; Kramer, M.6; Lam, M. T.14; Lasky, P. D.26; Lassus, A.6; Lazarus, P.6; Lazio, T. J. W.7; Lee, K. J.27; Levin, L.25,28; Liu, K.6; Lynch, R. S.29; Madison, D. R.30; McKee, J.25; McLaughlin, M.28; McWilliams, S. T.28; Mingarelli, C. M. F.6,31; Nice, D. J.32; Oslowski, S.5,6; Pennucci, T. T.33; Perera, B. B. P.25; Perrodin, D.12; Petiteau, A.34; Possenti, A.12; Ransom, S. M.30; Reardon, D.2,26; Rosado, P. A.35; Sanidas, S. A.23; Sesana, A.36; Shaifullah, G.5,6; Siemens, X.37; Smits, R.11; Stairs, I.; Stappers, B.25; Stinebring, D. R.38; Stovall, K.39; Swiggum, J.28,37; Taylor, S. R.7; Theureau, G.15,16,40; Tiburzi, C.5,6; Toomey, L.2; Vallisneri, M.7; van Straten, W.35; Vecchio, A.36; Wang, J. -B.41; Wang, Y.42; You, X. P.43; Zhu, W. W.6; Zhu, X. -J.44
Contribution Rank41

We analyse the stochastic properties of the 49 pulsars that comprise the first International Pulsar Timing Array (IPTA) data release. We use Bayesian methodology, performing model selection to determine the optimal description of the stochastic signals present in each pulsar. In addition to spin-noise and dispersion-measure (DM) variations, these models can include timing noise unique to a single observing system, or frequency band. We show the improved radio-frequency coverage and presence of overlapping data from different observing systems in the IPTA data set enables us to separate both system and band-dependent effects with much greater efficacy than in the individual pulsar timing array (PTA) data sets. For example, we show that PSR J1643-1224 has, in addition to DM variations, significant band-dependent noise that is coherent between PTAs which we interpret as coming from time-variable scattering or refraction in the ionized interstellar medium. Failing to model these different contributions appropriately can dramatically alter the astrophysical interpretation of the stochastic signals observed in the residuals. In some cases, the spectral exponent of the spin-noise signal can vary from 1.6 to 4 depending upon the model, which has direct implications for the long-term sensitivity of the pulsar to a stochastic gravitational-wave (GW) background. By using a more appropriate model, however, we can greatly improve a pulsar's sensitivity to GWs. For example, including system and band-dependent signals in the PSR J0437-4715 data set improves the upper limit on a fiducial GW background by similar to 60 per cent compared to a model that includes DM variations and spin-noise only.

Correspondent Emailltl21@cam.ac.uk
KeywordMethods: Data Analysis Pulsars: General
WOS HeadingsScience & Technology ; Physical Sciences
Indexed BySCI
WOS KeywordBlack-hole Binaries ; Frequency Gravitational-radiation ; Millisecond Pulsars ; Interstellar Plasma ; Precision ; Waves ; Dispersion ; Limits ; Scattering ; b1937+21
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000374569600082
Funding OrganizationNational Science Foundation (NSF) PIRE program(0968296) ; NSF Physics Frontier Center award(1430284) ; SRI International under NSF(AST-1100968) ; Ana G. Mendez-Universidad Metropolitana ; Universities Space Research Association ; Netherlands Foundation for Scientific Research NWO ; ERC Advanced Grant 'LEAP'(227947) ; STFC ; Commonwealth of Australia ; Junior Research Fellowship at Trinity Hall College, Cambridge University ; European Research Council under the European Union's Seventh Framework Programme (FP) / ERC(337062) ; Curtin Research Fellowship ; International Max Planck Research School Bonn/Cologne ; Bonn-Cologne Graduate School ; Royal Society ; NSERC ; NASA(PF4-150120) ; NWO ; ERC(337062) ; ARC ; ERC Advanced Grant
Citation statistics
Cited Times:73[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorLentati, L.
Affiliation1.Univ Cambridge, Cavendish Lab, Astrophys Grp, JJ Thomson Ave, Cambridge CB3 0HE, England
2.Australia Telescope Natl Facil, CSIRO Astron & Space Sci, Box 76, Epping, NSW 1710, Australia
3.Curtin Univ, Int Ctr Radio Astron Res, Bentley, WA 6102, Australia
4.Univ Calif San Diego, ECE Dept, La Jolla, CA 92093 USA
5.Univ Bielefeld, Fak Phys, Postfach 100131, D-33501 Bielefeld, Germany
6.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany
7.CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA
8.NASA, Goddard Space Flight Ctr, Ctr Res & Explorat Space Sci & Technol USRA, Code 662, Greenbelt, MD 20771 USA
9.NASA, Goddard Space Flight Ctr, X Ray Astrophys Lab, Code 662, Greenbelt, MD 20771 USA
10.Albert Einstein Inst, MPI Gravitat Phys, D-14476 Golm, Germany
11.ASTRON, Postbus 2, NL-7900 AA Dwingeloo, Netherlands
12.INAF, Osservatorio Astron Cagliari, Via Sci 5, I-09047 Selargius, CA, Italy
13.Natl Radio Astron Observ, POB O, Socorro, NM 87801 USA
14.Cornell Univ, Cornell Ctr Astrophys & Planetary Sci, Ithaca, NY 14853 USA
15.Univ Orleans, CNRS, Lab Phys & Chim Environm & Espace LPC2E, F-45071 Orleans, France
16.Observ Paris, CNRS, INSU, Stn Radioastron Nancay, F-18330 Nancay, France
17.Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China
18.Hillsdale Coll, Dept Phys, 33 E Coll St, Hillsdale, MI 49242 USA
19.McGill Univ, Dept Phys, Rutherford Phys Bldg,3600 Univ St, Montreal, PQ H3A 2T8, Canada
20.Univ British Columbia, Dept Phys & Astron, 6224 Agr Rd, Vancouver, BC V6T 1Z1, Canada
21.Univ Edinburgh, Sch Math, Kings Bldg, Edinburgh EH9 3JZ, Midlothian, Scotland
22.Vancouver Coastal Hlth, Dept Nucl Med, 899 W 12th Ave, Vancouver, BC V5Z 1M9, Canada
23.Univ Amsterdam, Astron Inst Anton Pannekoek, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands
24.Columbia Univ, Dept Phys, 538 W 120th St, New York, NY 10027 USA
25.Univ Manchester, Jodrell Bank, Ctr Astrophys, Manchester M13 9PL, Lancs, England
26.Monash Univ, Sch Phys & Astron, Monash Ctr Astrophys MoCA, Clayton, Vic 3800, Australia
27.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China
28.W Virginia Univ, Dept Phys & Astron, Morgantown, WV 26506 USA
29.Natl Radio Astron Observ, POB 2, Green Bank, WV 24944 USA
30.Natl Radio Astron Observ, 520 Edgemont Rd, Charlottesville, VA 22903 USA
31.CALTECH, TAPIR, MC 350-17, Pasadena, CA 91125 USA
32.Lafayette Coll, Dept Phys, Easton, PA 18042 USA
33.Univ Virginia, Dept Astron, POB 400325, Charlottesville, VA 22904 USA
34.Univ Paris Diderot Paris7, APC UFR Phys, Batiment Condorcet,10 Rue Alice Domont & Leonie D, F-75205 Paris 13, France
35.Swinburne Univ Technol, Ctr Astrophys & Supercomputing, POB 218, Hawthorn, Vic 3122, Australia
36.Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England
37.Univ Wisconsin, Dept Phys, Ctr Gravitat Cosmol & Astrophys, POB 413, Milwaukee, WI 53201 USA
38.Oberlin Coll, Dept Phys & Astron, Oberlin, OH 44074 USA
39.Univ New Mexico, Dept Phys & Astron, Albuquerque, NM 87131 USA
40.Univ Paris Diderot, CNRS, INSU, Lab Univ & Theories LUTh,Observ Paris, 5 Pl Jules Janssen, F-92190 Meudon, France
41.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China
42.Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Hubei Province, Peoples R China
43.Southwest Univ, Sch Phys Sci & Technol, Chongqing 400715, Peoples R China
44.Univ Western Australia, Sch Phys, Crawley, WA 6009, Australia
Recommended Citation
GB/T 7714
Lentati, L.,Shannon, R. M.,Coles, W. A.,et al. From spin noise to systematics: stochastic processes in the first International Pulsar Timing Array data release[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2016,458(2):2161-2187.
APA Lentati, L..,Shannon, R. M..,Coles, W. A..,Verbiest, J. P. W..,van Haasteren, R..,...&Zhu, X. -J..(2016).From spin noise to systematics: stochastic processes in the first International Pulsar Timing Array data release.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,458(2),2161-2187.
MLA Lentati, L.,et al."From spin noise to systematics: stochastic processes in the first International Pulsar Timing Array data release".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 458.2(2016):2161-2187.
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