Prospects for high-precision pulsar timing with the new Effelsberg PSRIX backend
Lazarus, P.1; Karuppusamy, R.1; Graikou, E.1; Caballero, R. N.1; Champion, D. J.1; Lee, K. J.1,2; Verbiest, J. P. W.1,3; Kramer, M.1,4; Lazarus, P
2015-05-01
Source PublicationMonthly Notices of the Royal Astronomical Society
ISSN0035-8711
Volume458Issue:1Pages:868-880
Abstract

The PSRIX backend is the primary pulsar timing instrument of the Effelsberg 100 m radio telescope since early 2011. This new ROACH-based system enables bandwidths up to 500 MHz to be recorded, significantly more than what was possible with its predecessor, the Effelsberg Berkeley Pulsar Processor (EBPP). We review the first four years of PSRIX timing data for 33 pulsars collected as part of the monthly European Pulsar Timing Array (EPTA) observations. We describe the automated data analysis pipeline, COASTGUARD, that we developed to reduce these observations. We also introduce TOASTER, the EPTA timing data base, used to store timing results, processing information and observation metadata. Using these new tools, we measure the phase-averaged flux densities at 1.4 GHz of all 33 pulsars. For seven of these pulsars, our flux density measurements are the first values ever reported. For the other 26 pulsars, we compare our flux density measurements with previously published values. By comparing PSRIX data with EBPP data, we find an improvement of similar to 2-5 times in signal-to-noise ratio, which translates to an increase of similar to 2-5 times in pulse time-of-arrival (TOA) precision. We show that such an improvement in TOA precision will improve the sensitivity to the stochastic gravitational wave background. Finally, we showcase the flexibility of the new PSRIX backend by observing several millisecond-period pulsars (MSPs) at 5 and 9 GHz. Motivated by our detections, we discuss the potential for complementing existing pulsar timing array data sets with MSP monitoring campaigns at these higher frequencies.

Correspondent Emailplazarus@mpifr-bonn.mpg.de
KeywordGravitational Waves Stars: Neutron Pulsars: General
SubtypeArticle
DOI10.1093/mnras/stw189
Indexed BySCI
Language英语
WOS Keyword4 Millisecond Pulsars ; Initial Discoveries ; Gravitational-waves ; Dispersion ; Binary ; Telescope ; Emission ; Array ; Bank ; Evolution
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000374568900061
Project Number2015CB857101 ; 11373011 ; 227947
Funding OrganizationIMPRS Bonn/Cologne ; Bonn-Cologne Graduate School ; 973 Program ; NSFC ; ERC Advanced Grant LEAP ; National Basic Research Program of China
Citation statistics
Cited Times:62[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.xao.ac.cn/handle/45760611-7/1627
Collection110米口径全可动射电望远镜(QTT)_110米大口径全可动射电望远镜关键技术研究(973项目)_课题1:大样本射电天体的观测和前沿问题研究
Corresponding AuthorLazarus, P
Affiliation1.1Max-Planck-Institut fur Radioastronomie, Auf dem Hugel 69, D-53121 Bonn, Germany
2.Kavli institute for astronomy and astrophysics, Peking University, Beijing 100871, P.R. China
3.Fakultat fur Physik, Universitat Bielefeld, Postfach 100131, D-33501 Bielefeld, Germany
4.Jodrell Bank Centre for Astrophysics, University of Manchester, Manchester M13 9PL, UK 
Recommended Citation
GB/T 7714
Lazarus, P.,Karuppusamy, R.,Graikou, E.,et al. Prospects for high-precision pulsar timing with the new Effelsberg PSRIX backend[J]. Monthly Notices of the Royal Astronomical Society,2015,458(1):868-880.
APA Lazarus, P..,Karuppusamy, R..,Graikou, E..,Caballero, R. N..,Champion, D. J..,...&Lazarus, P.(2015).Prospects for high-precision pulsar timing with the new Effelsberg PSRIX backend.Monthly Notices of the Royal Astronomical Society,458(1),868-880.
MLA Lazarus, P.,et al."Prospects for high-precision pulsar timing with the new Effelsberg PSRIX backend".Monthly Notices of the Royal Astronomical Society 458.1(2015):868-880.
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