The High Time Resolution Universe Pulsar Survey - XIX

A coherent GPU-accelerated reprocessing and the discovery of 71 pulsars in the Southern Galactic plane

verfasst von: R. Sengar, M. Bailes, V. Balakrishnan, E. D. Barr, N. D.R. Bhat, M. Burgay, M. C.I. Bernadich, A. D. Cameron, D. J. Champion, W. Chen, C. M.L. Flynn, A. Jameson, S. Johnston, M. J. Keith, M. Kramer, V. Morello, C. Ng, A. Possenti, S. Stevenson, R. M. Shannon, W. Van Straten, J. Wongphechauxsorn
Abstract: We conducted a GPU-accelerated reprocessing of of the archival data from the High Time Resolution Universe South Low Latitude (HTRU-S LowLat) pulsar survey by implementing a pulsar search pipeline that was previously used to reprocess the Parkes Multibeam Pulsar Survey (PMPS). We coherently searched the full 72-min observations of the survey with an acceleration search range up to, which is most sensitive to binary pulsars experiencing nearly constant acceleration during 72 min of their orbital period. Here we report the discovery of 71 pulsars, including six millisecond pulsars, of which five are in binary systems, and seven pulsars with very high dispersion measures (DM). These pulsar discoveries largely arose by folding candidates to a much lower spectral signal-to-noise ratio than in previous surveys and by exploiting the coherence of folding over the incoherent summing of the Fourier components to discover new pulsars as well as candidate classification techniques. We show that these pulsars could be fainter and on average more distant as compared with both the previously reported 100 HTRU-S LowLat pulsars and the background pulsar population in the survey region. We have assessed the effectiveness of our search method and the overall pulsar yield of the survey. We show that through this reprocessing we have achieved the expected survey goals, including the predicted number of pulsars in the survey region, and discuss the major causes why these pulsars were missed in previous processing of the survey.
Organisationseinheit(en): Institut für Gravitationsphysik
Externe Organisation(en): Swinburne University of Technology
University of Wisconsin Milwaukee
Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut)
Max-Planck-Institut für Radioastronomie (MPIfR)
International Centre for Radio Astronomy Research (ICRAR)
Istituto Nazionale di Astrofisica (INAF)
Commonwealth Scientific and Industrial Research Organisation (CSIRO)
University of Manchester
University of Toronto
University of Cagliari
Auckland University of Technology
Typ: Artikel
Journal: Monthly Notices of the Royal Astronomical Society
Band: 536
Seiten: 3159-3176
Anzahl der Seiten: 18
ISSN: 0035-8711
Publikationsdatum: 02.2025
Publikationsstatus: Veröffentlicht
Peer-reviewed: Ja
ASJC Scopus Sachgebiete: Astronomie und Astrophysik, Astronomie und Planetologie
Elektronische Version(en): https://doi.org/10.48550/arXiv.2412.07104 (Zugang: Offen)
https://doi.org/10.1093/mnras/stae2716 (Zugang: Offen)

BibTeX

@article{80821c1704ce4b12baa1ad9ae0799d1b,
title = "The High Time Resolution Universe Pulsar Survey - XIX: A coherent GPU-accelerated reprocessing and the discovery of 71 pulsars in the Southern Galactic plane",
abstract = "We conducted a GPU-accelerated reprocessing of of the archival data from the High Time Resolution Universe South Low Latitude (HTRU-S LowLat) pulsar survey by implementing a pulsar search pipeline that was previously used to reprocess the Parkes Multibeam Pulsar Survey (PMPS). We coherently searched the full 72-min observations of the survey with an acceleration search range up to, which is most sensitive to binary pulsars experiencing nearly constant acceleration during 72 min of their orbital period. Here we report the discovery of 71 pulsars, including six millisecond pulsars, of which five are in binary systems, and seven pulsars with very high dispersion measures (DM). These pulsar discoveries largely arose by folding candidates to a much lower spectral signal-to-noise ratio than in previous surveys and by exploiting the coherence of folding over the incoherent summing of the Fourier components to discover new pulsars as well as candidate classification techniques. We show that these pulsars could be fainter and on average more distant as compared with both the previously reported 100 HTRU-S LowLat pulsars and the background pulsar population in the survey region. We have assessed the effectiveness of our search method and the overall pulsar yield of the survey. We show that through this reprocessing we have achieved the expected survey goals, including the predicted number of pulsars in the survey region, and discuss the major causes why these pulsars were missed in previous processing of the survey.",
keywords = "pulsars: general, stars: neutron, surveys",
author = "R. Sengar and M. Bailes and V. Balakrishnan and Barr, {E. D.} and Bhat, {N. D.R.} and M. Burgay and Bernadich, {M. C.I.} and Cameron, {A. D.} and Champion, {D. J.} and W. Chen and Flynn, {C. M.L.} and A. Jameson and S. Johnston and Keith, {M. J.} and M. Kramer and V. Morello and C. Ng and A. Possenti and S. Stevenson and Shannon, {R. M.} and {Van Straten}, W. and J. Wongphechauxsorn",
note = "Publisher Copyright: {\textcopyright} 2024 The Author(s).",
year = "2025",
month = feb,
doi = "10.48550/arXiv.2412.07104",
language = "English",
volume = "536",
pages = "3159--3176",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "4",
}