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An image-based search for pulsars among Fermi unassociated LAT sources
Abstract 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 al...
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| Published in: | Monthly notices of the Royal Astronomical Society 2018-03, Vol.475 (1), p.942-954 |
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| Main Authors: | , , , , , , , , , , , |
| Format: | Article |
| Language: | English |
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| cited_by | cdi_FETCH-LOGICAL-c364t-85197c7eebdf382bc54c137c940aa70f16f65e574fd834e2cd861639a73c7713 |
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| cites | cdi_FETCH-LOGICAL-c364t-85197c7eebdf382bc54c137c940aa70f16f65e574fd834e2cd861639a73c7713 |
| container_end_page | 954 |
| container_issue | 1 |
| container_start_page | 942 |
| container_title | Monthly notices of the Royal Astronomical Society |
| container_volume | 475 |
| creator | Frail, D A Ray, P S Mooley, K P Hancock, P Burnett, T H Jagannathan, P Ferrara, E C Intema, H T de Gasperin, F Demorest, P B Stovall, K McKinnon, M M |
| description | Abstract
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. |
| doi_str_mv | 10.1093/mnras/stx3281 |
| format | article |
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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.</description><identifier>ISSN: 0035-8711</identifier><identifier>EISSN: 1365-2966</identifier><identifier>DOI: 10.1093/mnras/stx3281</identifier><language>eng</language><publisher>London: Oxford University Press</publisher><subject>Criteria ; Gamma rays ; Pulsars ; Radio telescopes ; Searching ; Sky surveys (astronomy)</subject><ispartof>Monthly notices of the Royal Astronomical Society, 2018-03, Vol.475 (1), p.942-954</ispartof><rights>2017 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society 2018</rights><rights>2017 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c364t-85197c7eebdf382bc54c137c940aa70f16f65e574fd834e2cd861639a73c7713</citedby><cites>FETCH-LOGICAL-c364t-85197c7eebdf382bc54c137c940aa70f16f65e574fd834e2cd861639a73c7713</cites><orcidid>0000-0003-4439-2627 ; 0000-0002-5297-5278 ; 0000-0002-5825-9635 ; 0000-0002-2557-5180</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>315,786,790,1591,27957,27958</link.rule.ids></links><search><creatorcontrib>Frail, D A</creatorcontrib><creatorcontrib>Ray, P S</creatorcontrib><creatorcontrib>Mooley, K P</creatorcontrib><creatorcontrib>Hancock, P</creatorcontrib><creatorcontrib>Burnett, T H</creatorcontrib><creatorcontrib>Jagannathan, P</creatorcontrib><creatorcontrib>Ferrara, E C</creatorcontrib><creatorcontrib>Intema, H T</creatorcontrib><creatorcontrib>de Gasperin, F</creatorcontrib><creatorcontrib>Demorest, P B</creatorcontrib><creatorcontrib>Stovall, K</creatorcontrib><creatorcontrib>McKinnon, M M</creatorcontrib><title>An image-based search for pulsars among Fermi unassociated LAT sources</title><title>Monthly notices of the Royal Astronomical Society</title><description>Abstract
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.</description><subject>Criteria</subject><subject>Gamma rays</subject><subject>Pulsars</subject><subject>Radio telescopes</subject><subject>Searching</subject><subject>Sky surveys (astronomy)</subject><issn>0035-8711</issn><issn>1365-2966</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNqF0DtPwzAUBWALgUQpjOyWWFhMfe34kbGqKCBFYuluuY5dWjUPfBMJ_j2Bdme6y6d7dA4h98CfgJdy0bTZ4wKHLyksXJAZSK2YKLW-JDPOpWLWAFyTG8QD57yQQs_IetnSfeN3kW09xppi9Dl80NRl2o9H9Bmpb7p2R9cxN3s6th6xC3s_TLZabih2Yw4Rb8lV8keMd-c7J5v182b1yqr3l7fVsmJB6mJgVkFpgolxWydpxTaoIoA0oSy494Yn0EmrqEyRaiuLKEJtNWhZeiODMSDn5OH0ts_d5xhxcIcpv50SnQDBNShly0mxkwq5Q8wxuT5PHfO3A-5-l3J_S7nzUpN_PPlu7P-hPzNRauI</recordid><startdate>20180321</startdate><enddate>20180321</enddate><creator>Frail, D A</creator><creator>Ray, P S</creator><creator>Mooley, K P</creator><creator>Hancock, P</creator><creator>Burnett, T H</creator><creator>Jagannathan, P</creator><creator>Ferrara, E C</creator><creator>Intema, H T</creator><creator>de Gasperin, F</creator><creator>Demorest, P B</creator><creator>Stovall, K</creator><creator>McKinnon, M M</creator><general>Oxford University Press</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0003-4439-2627</orcidid><orcidid>https://orcid.org/0000-0002-5297-5278</orcidid><orcidid>https://orcid.org/0000-0002-5825-9635</orcidid><orcidid>https://orcid.org/0000-0002-2557-5180</orcidid></search><sort><creationdate>20180321</creationdate><title>An image-based search for pulsars among Fermi unassociated LAT sources</title><author>Frail, D A ; Ray, P S ; Mooley, K P ; Hancock, P ; Burnett, T H ; Jagannathan, P ; Ferrara, E C ; Intema, H T ; de Gasperin, F ; Demorest, P B ; Stovall, K ; McKinnon, M M</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c364t-85197c7eebdf382bc54c137c940aa70f16f65e574fd834e2cd861639a73c7713</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Criteria</topic><topic>Gamma rays</topic><topic>Pulsars</topic><topic>Radio telescopes</topic><topic>Searching</topic><topic>Sky surveys (astronomy)</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Frail, D A</creatorcontrib><creatorcontrib>Ray, P S</creatorcontrib><creatorcontrib>Mooley, K P</creatorcontrib><creatorcontrib>Hancock, P</creatorcontrib><creatorcontrib>Burnett, T H</creatorcontrib><creatorcontrib>Jagannathan, P</creatorcontrib><creatorcontrib>Ferrara, E C</creatorcontrib><creatorcontrib>Intema, H T</creatorcontrib><creatorcontrib>de Gasperin, F</creatorcontrib><creatorcontrib>Demorest, P B</creatorcontrib><creatorcontrib>Stovall, K</creatorcontrib><creatorcontrib>McKinnon, M M</creatorcontrib><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Monthly notices of the Royal Astronomical Society</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Frail, D A</au><au>Ray, P S</au><au>Mooley, K P</au><au>Hancock, P</au><au>Burnett, T H</au><au>Jagannathan, P</au><au>Ferrara, E C</au><au>Intema, H T</au><au>de Gasperin, F</au><au>Demorest, P B</au><au>Stovall, K</au><au>McKinnon, M M</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>An image-based search for pulsars among Fermi unassociated LAT sources</atitle><jtitle>Monthly notices of the Royal Astronomical Society</jtitle><date>2018-03-21</date><risdate>2018</risdate><volume>475</volume><issue>1</issue><spage>942</spage><epage>954</epage><pages>942-954</pages><issn>0035-8711</issn><eissn>1365-2966</eissn><abstract>Abstract
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.</abstract><cop>London</cop><pub>Oxford University Press</pub><doi>10.1093/mnras/stx3281</doi><tpages>13</tpages><orcidid>https://orcid.org/0000-0003-4439-2627</orcidid><orcidid>https://orcid.org/0000-0002-5297-5278</orcidid><orcidid>https://orcid.org/0000-0002-5825-9635</orcidid><orcidid>https://orcid.org/0000-0002-2557-5180</orcidid></addata></record> |
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| ispartof | Monthly notices of the Royal Astronomical Society, 2018-03, Vol.475 (1), p.942-954 |
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| language | eng |
| recordid | cdi_proquest_journals_2120615589 |
| source | Oxford University Press Journals Current; EZB Electronic Journals Library |
| subjects | Criteria Gamma rays Pulsars Radio telescopes Searching Sky surveys (astronomy) |
| title | An image-based search for pulsars among Fermi unassociated LAT sources |
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