{"id":"https://openalex.org/W2033831730","doi":"https://doi.org/10.1086/112235","title":"A high declination search at 8 GHz for compact radio sources","display_name":"A high declination search at 8 GHz for compact radio sources","publication_year":1978,"publication_date":"1978-06-01","ids":{"openalex":"https://openalex.org/W2033831730","doi":"https://doi.org/10.1086/112235","mag":"2033831730"},"language":"en","primary_location":{"id":"doi:10.1086/112235","doi":"https://doi.org/10.1086/112235","is_oa":false,"landing_page_url":"https://doi.org/10.1086/112235","pdf_url":null,"source":{"id":"https://openalex.org/S100695177","display_name":"The Astronomical Journal","issn_l":"0004-6256","issn":["0004-6256","1538-3881"],"is_oa":false,"is_in_doaj":true,"is_core":true,"listed_in":["cwts-core","doaj","dongbi-b","jufo-1","norway-1","oarl","poland-140","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310311669","host_organization_name":"Institute of Physics","host_organization_lineage":["https://openalex.org/P4310311669"],"host_organization_lineage_names":["Institute of Physics"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"The Astronomical Journal","raw_type":"journal-article"},"volume":null,"type":"article","indexed_in":["crossref","doaj"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5031465496","display_name":"Jill J. Wittels","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I63966007","display_name":"Massachusetts Institute of Technology","ror":"https://ror.org/042nb2s44","country_code":"US","type":"education","lineage":["https://openalex.org/I63966007"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"J. J. Wittels","raw_affiliation_strings":["MIT, Cambridge, Mass"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"MIT, Cambridge, Mass","institution_ids":["https://openalex.org/I63966007"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5050866446","display_name":"Irwin I. Shapiro","orcid":"https://orcid.org/0000-0001-8948-9997","observed_orcids":["https://orcid.org/0000-0001-8948-9997"]},"institutions":[{"id":"https://openalex.org/I63966007","display_name":"Massachusetts Institute of Technology","ror":"https://ror.org/042nb2s44","country_code":"US","type":"education","lineage":["https://openalex.org/I63966007"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"I. I. Shapiro","raw_affiliation_strings":["MIT, Cambridge, Mass"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"MIT, Cambridge, Mass","institution_ids":["https://openalex.org/I63966007"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5108765463","display_name":"Douglas S. Robertson","orcid":"https://orcid.org/0000-0002-5415-0181","observed_orcids":["https://orcid.org/0000-0002-5415-0181"]},"institutions":[{"id":"https://openalex.org/I63966007","display_name":"Massachusetts Institute of Technology","ror":"https://ror.org/042nb2s44","country_code":"US","type":"education","lineage":["https://openalex.org/I63966007"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"D. S. Robertson","raw_affiliation_strings":["MIT, Cambridge, Mass"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"MIT, Cambridge, Mass","institution_ids":["https://openalex.org/I63966007"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5046024537","display_name":"Hans F. Hinteregger","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"H. F. Hinteregger","raw_affiliation_strings":["Haystack Observatory, Westford, Mass"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Haystack Observatory, Westford, Mass","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5109884082","display_name":"Curtis A. Knight","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I1306266525","display_name":"Goddard Space Flight Center","ror":"https://ror.org/0171mag52","country_code":"US","type":"facility","lineage":["https://openalex.org/I1306266525","https://openalex.org/I4210124779"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"C. A. Knight","raw_affiliation_strings":["NASA, Goddard Space Flight Center, Greenbelt, Md"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"NASA, Goddard Space Flight Center, Greenbelt, Md","institution_ids":["https://openalex.org/I1306266525"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5102884468","display_name":"Thomas Alan Clark","orcid":"https://orcid.org/0000-0002-2185-7543","observed_orcids":["https://orcid.org/0000-0002-2185-7543"]},"institutions":[{"id":"https://openalex.org/I122411786","display_name":"California Institute of Technology","ror":"https://ror.org/05dxps055","country_code":"US","type":"education","lineage":["https://openalex.org/I122411786"]},{"id":"https://openalex.org/I1334627681","display_name":"Jet Propulsion Laboratory","ror":"https://ror.org/027k65916","country_code":"US","type":"facility","lineage":["https://openalex.org/I122411786","https://openalex.org/I1334627681","https://openalex.org/I4210124779"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"T. A. Clark","raw_affiliation_strings":["California Institute of Technology, Jet Propulsion Laboratory, Pasadena, Calif"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"California Institute of Technology, Jet Propulsion Laboratory, Pasadena, Calif","institution_ids":["https://openalex.org/I122411786","https://openalex.org/I1334627681"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5102322368","display_name":"L. K. Hutton","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I122411786","display_name":"California Institute of Technology","ror":"https://ror.org/05dxps055","country_code":"US","type":"education","lineage":["https://openalex.org/I122411786"]},{"id":"https://openalex.org/I1334627681","display_name":"Jet Propulsion Laboratory","ror":"https://ror.org/027k65916","country_code":"US","type":"facility","lineage":["https://openalex.org/I122411786","https://openalex.org/I1334627681","https://openalex.org/I4210124779"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"L. K. Hutton","raw_affiliation_strings":["California Institute of Technology, Jet Propulsion Laboratory, Pasadena, Calif"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"California Institute of Technology, Jet Propulsion Laboratory, Pasadena, Calif","institution_ids":["https://openalex.org/I122411786","https://openalex.org/I1334627681"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5041587993","display_name":"Cong Ma","orcid":"https://orcid.org/0009-0004-3336-027X","observed_orcids":["https://orcid.org/0009-0004-3336-027X","https://orcid.org/0000-0001-6109-2365"]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"C. Ma","raw_affiliation_strings":["-"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"-","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5046186918","display_name":"Arthur E. Niell","orcid":"https://orcid.org/0000-0001-5267-4005","observed_orcids":["https://orcid.org/0000-0001-5267-4005"]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"A. E. Niell","raw_affiliation_strings":["-"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"-","institution_ids":[]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5040580252","display_name":"George M. Resch","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"G. M. Resch","raw_affiliation_strings":["-"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"-","institution_ids":[]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":4,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":{"value":4499,"currency":"USD","value_usd":4499},"apc_paid":null,"fwci":0.6314,"has_fulltext":false,"cited_by_count":1,"citation_normalized_percentile":{"value":0.7294061,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":"83","issue":null,"first_page":"560","last_page":"560"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10744","display_name":"Astrophysical Phenomena and Observations","score":0.6514000296592712,"subfield":{"id":"https://openalex.org/subfields/3103","display_name":"Astronomy and Astrophysics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10744","display_name":"Astrophysical Phenomena and Observations","score":0.6514000296592712,"subfield":{"id":"https://openalex.org/subfields/3103","display_name":"Astronomy and Astrophysics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10026","display_name":"Galaxies: Formation, Evolution, Phenomena","score":0.17649999260902405,"subfield":{"id":"https://openalex.org/subfields/3103","display_name":"Astronomy and Astrophysics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12450","display_name":"Radio Astronomy Observations and Technology","score":0.12439999729394913,"subfield":{"id":"https://openalex.org/subfields/3103","display_name":"Astronomy and Astrophysics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/compact-radio-sources","display_name":"compact radio sources","score":0.9240000247955322},{"id":"https://openalex.org/keywords/3c-390-3","display_name":"3C 390.3","score":0.9990000128746033},{"id":"https://openalex.org/keywords/double-radio-sources","display_name":"double radio sources","score":0.8759999871253967},{"id":"https://openalex.org/keywords/radio-interferometry","display_name":"radio interferometry","score":0.5740000009536743}],"concepts":[{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.9224060773849487},{"id":"https://openalex.org/C124200008","wikidata":"https://www.wikidata.org/wiki/Q76287","display_name":"Declination","level":2,"score":0.8665090799331665},{"id":"https://openalex.org/C150143219","wikidata":"https://www.wikidata.org/wiki/Q4306","display_name":"Radio astronomy","level":2,"score":0.6014561653137207},{"id":"https://openalex.org/C1276947","wikidata":"https://www.wikidata.org/wiki/Q333","display_name":"Astronomy","level":1,"score":0.5199688673019409},{"id":"https://openalex.org/C44870925","wikidata":"https://www.wikidata.org/wiki/Q37547","display_name":"Astrophysics","level":1,"score":0.42457717657089233},{"id":"https://openalex.org/C79896159","wikidata":"https://www.wikidata.org/wiki/Q1148351","display_name":"Very-long-baseline interferometry","level":2,"score":0.4131302833557129},{"id":"https://openalex.org/C62649853","wikidata":"https://www.wikidata.org/wiki/Q199687","display_name":"Remote sensing","level":1,"score":0.32506364583969116},{"id":"https://openalex.org/C127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","level":0,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1086/112235","doi":"https://doi.org/10.1086/112235","is_oa":false,"landing_page_url":"https://doi.org/10.1086/112235","pdf_url":null,"source":{"id":"https://openalex.org/S100695177","display_name":"The Astronomical Journal","issn_l":"0004-6256","issn":["0004-6256","1538-3881"],"is_oa":false,"is_in_doaj":true,"is_core":true,"listed_in":["cwts-core","doaj","dongbi-b","jufo-1","norway-1","oarl","poland-140","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310311669","host_organization_name":"Institute of Physics","host_organization_lineage":["https://openalex.org/P4310311669"],"host_organization_lineage_names":["Institute of Physics"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"The Astronomical Journal","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":0,"referenced_works":[],"related_works":["https://openalex.org/W1975512956","https://openalex.org/W2049370762","https://openalex.org/W2794115446","https://openalex.org/W2155181475","https://openalex.org/W7057457473","https://openalex.org/W2007725586","https://openalex.org/W1993278903","https://openalex.org/W2051501240","https://openalex.org/W1640268246","https://openalex.org/W186600326"],"abstract_inverted_index":{"With":[0],"the":[1,46,59,63,67,84,87,128,135,141,145,152,155,179],"Haystack-NRAO":[2],"interferometer":[3],"(baseline":[4],"length":[5],"of":[6,24,62,66,86,89,102,122,140,181],"20":[7],"million":[8],"wavelengths":[9],"at":[10],"3.8":[11],"cm)":[12],"37":[13],"sources":[14,26,48,68,147],"were":[15,19,78,114,148],"observed":[16,80],"whose":[17],"declinations":[18],"above":[20,55],"50":[21],"deg.":[22],"Seven":[23],"these":[25,158],"have":[27,49],"compact":[28,71,168],"cores":[29,51],"with":[30,37,52,69,81,130,200,206],"diameters":[31],"smaller":[32,96,107],"than":[33,42,97,108],"5":[34],"milliarcsec":[35,99],"and":[36,75,100,125,192],"correlated":[38],"flux":[39,53],"densities":[40,54],"greater":[41],"about":[43,56],"0.5":[44],"Jy;":[45],"remaining":[47],"no":[50],"0.3":[57],"Jy,":[58],"sensitivity":[60],"limit":[61],"interferometer.":[64],"Two":[65],"detected":[70,146,170],"cores,":[72],"4C":[73,90],"67.05":[74,91],"3C":[76,103,172,207],"418,":[77],"also":[79,149],"longer-baseline":[82],"interferometers;":[83],"diameter":[85,112],"core":[88,169],"was":[92,174],"estimated":[93],"to":[94,105,127,134,164,176,193,196],"be":[95,106,194],"1":[98,198],"that":[101,139],"418":[104],"0.4":[109],"milliarcsec.":[110],"All":[111],"estimates":[113,160],"based":[115],"on":[116],"an":[117,201],"assumed":[118],"circular":[119],"Gaussian":[120],"distribution":[121],"radio":[123,190],"brightness":[124,131],"refer":[126],"contour":[129],"density":[132],"e":[133],"-1/2":[136],"power":[137],"times":[138],"center.":[142],"Positions":[143],"for":[144],"obtained":[150],"from":[151,162],"interferometric":[153],"data,":[154],"uncertainty":[156],"in":[157,171,187],"coordinate":[159],"ranging":[161],"0.04":[163],"0.6":[165],"arcsec.":[166],"The":[167],"390.3":[173],"found":[175],"lie":[177],"near":[178],"center":[180],"this":[182],"extended":[183],"(approximately":[184],"4":[185],"arcmin":[186],"diameter)":[188],"double":[189],"source":[191],"coincident":[195],"within":[197],"arcsec":[199],"N":[202],"galaxy":[203],"previously":[204],"identified":[205],"390.3.":[208]},"counts_by_year":[],"updated_date":"2026-09-25T08:18:29.962427","created_date":"2016-06-24T00:00:00"}