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dc.contributor.authorFrail, D.
dc.contributor.authorRay, P.
dc.contributor.authorMooley, K.
dc.contributor.authorHancock, Paul
dc.contributor.authorBurnett, T.
dc.contributor.authorJagannathan, P.
dc.contributor.authorFerrara, E.
dc.contributor.authorIntema, H.
dc.contributor.authorde Gasperin, F.
dc.contributor.authorDemorest, P.
dc.contributor.authorStovall, K.
dc.contributor.authorMcKinnon, M.
dc.identifier.citationFrail, D. and Ray, P. and Mooley, K. and Hancock, P. and Burnett, T. and Jagannathan, P. and Ferrara, E. et al. 2018. An image-based search for pulsars among Fermi unassociated LAT sources. Monthly Notices of the Royal Astronomical Society. 475 (1): pp. 942-954.

We describe an image-based method that uses two radio criteria, compactness, and spectral index, to identify promising pulsar candidates among Fermi Large Area Telescope (LAT) unassociated sources. These criteria are applied to those radio sources from the Giant Metrewave Radio Telescope all-sky survey at 150 MHz (TGSS ADR1) found within the error ellipses of unassociated sources from the 3FGL catalogue and a preliminary source list based on 7 yr of LAT data. After follow-up interferometric observations to identify extended or variable sources, a list of 16 compact, steep-spectrum candidates is generated. An ongoing search for pulsations in these candidates, in gamma rays and radio, has found 6 ms pulsars and one normal pulsar. A comparison of this method with existing selection criteria based on gamma-ray spectral and variability properties suggests that the pulsar discovery space using Fermi may be larger than previously thought. Radio imaging is a hitherto underutilized source selection method that can be used, as with other multiwavelength techniques, in the search for Fermi pulsars.

dc.publisherOxford University Press
dc.titleAn image-based search for pulsars among Fermi unassociated LAT sources
dc.typeJournal Article
dcterms.source.titleMonthly Notices of the Royal Astronomical Society

This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2018 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

curtin.departmentCurtin Institute of Radio Astronomy (Physics)
curtin.accessStatusOpen access

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