LEAP: the Large European Array for Pulsars
Bassa, C. G.1,2; Janssen, G. H.1,2; Karuppusamy, R.2,3; Kramer, M.2,3; Lee, K. J.2,3,4; Liu, K.2,3,5; McKee, J.2; Perrodin, D.2,6; Purver, M.2; Sanidas, S.2,7; Smits, R.1,2; Stappers, B. W.2
Source PublicationMonthly Notices of the Royal Astronomical Society
AbstractThe Large European Array for Pulsars (LEAP) is an experiment that harvests the collective power of Europe's largest radio telescopes in order to increase the sensitivity of high-precision pulsar timing. As part of the ongoing effort of the European Pulsar Timing Array, LEAP aims to go beyond the sensitivity threshold needed to deliver the first direct detection of gravitational waves. The five telescopes presently included in LEAP are the Effelsberg Telescope, the Lovell Telescope at Jodrell Bank, the Nanc, ay Radio Telescope, the Sardinia Radio Telescope and the Westerbork Synthesis Radio Telescope. Dual polarization, Nyquist-sampled time series of the incoming radio waves are recorded and processed offline to form the coherent sum, resulting in a tied-array telescope with an effective aperture equivalent to a 195-m diameter circular dish. All observations are performed using a bandwidth of 128 MHz centred at a frequency of 1396 MHz. In this paper, we present the design of the LEAP experiment, the instrumentation, the storage and transfer of data and the processing hardware and software. In particular, we present the software pipeline that was designed to process the Nyquist-sampled time series, measure the phase and time delays between each individual telescope and a reference telescope and apply these delays to form the tied-array coherent addition. The pipeline includes polarization calibration and interference mitigation. We also present the first results from LEAP and demonstrate the resulting increase in sensitivity, which leads to an improvement in the pulse arrival times.
Correspondent Emailbassa@astron.nl
KeywordGravitational Waves Methods: Data Analysis Techniques: Interferometric Pulsars: General
Indexed BySCI
WOS Keywordradio astronomical polarimetry ; spectral kurtosis estimator ; gravitational-radiation ; millisecond pulsars ; general-relativity ; limits ; search ; j1713+0747 ; westerbork ; telescope
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000372264200077
Project Number227947 ; 2015CB857101 ; 11373011
Funding OrganizationERC Advanced Grant ‘LEAP’ ; National Basic Research Program of China, 973 Program ; NSFC
Citation statistics
Cited Times:43[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorBassa, C. G.
Affiliation1.ASTRON, the Netherlands Institute for Radio Astronomy, Postbus 2, NL-7990 AA Dwingeloo, the Netherlands
2.Jodrell Bank Centre for Astrophysics, The University of Manchester, Manchester M13 9PL, UK
3.Max Planck Institut f¨ur Radioastronomie, Auf dem H¨ugel 69, D-53121 Bonn, Germany
4.Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, China
5.Station de Radioastronomie de Nanc¸ay, Observatoire de Paris, F-18330 Nanc¸ay, France
6.INAF – Osservatorio Astronomico di Cagliari, via della Scienza 5, I-09047 Selargius (CA), Italy
7.Anton Pannekoek Institute for Astronomy, University of Amsterdam, Science Park 904, NL-1098 XH Amsterdam, the Netherlands
Recommended Citation
GB/T 7714
Bassa, C. G.,Janssen, G. H.,Karuppusamy, R.,et al. LEAP: the Large European Array for Pulsars[J]. Monthly Notices of the Royal Astronomical Society,2016,456(2):2196-2209.
APA Bassa, C. G..,Janssen, G. H..,Karuppusamy, R..,Kramer, M..,Lee, K. J..,...&Stappers, B. W..(2016).LEAP: the Large European Array for Pulsars.Monthly Notices of the Royal Astronomical Society,456(2),2196-2209.
MLA Bassa, C. G.,et al."LEAP: the Large European Array for Pulsars".Monthly Notices of the Royal Astronomical Society 456.2(2016):2196-2209.
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