{"id":"https://openalex.org/W1978148018","doi":"https://doi.org/10.1086/143420","title":"The Limiting Magnitude Observable with a Photoelectric Stellar Photometer","display_name":"The Limiting Magnitude Observable with a Photoelectric Stellar Photometer","publication_year":1932,"publication_date":"1932-12-01","ids":{"openalex":"https://openalex.org/W1978148018","doi":"https://doi.org/10.1086/143420","mag":"1978148018"},"language":"en","primary_location":{"id":"doi:10.1086/143420","doi":"https://doi.org/10.1086/143420","is_oa":false,"landing_page_url":"https://doi.org/10.1086/143420","pdf_url":null,"source":{"id":"https://openalex.org/S1980519","display_name":"The Astrophysical Journal","issn_l":"0004-637X","issn":["0004-637X","1538-4357"],"is_oa":false,"is_in_doaj":true,"is_core":true,"listed_in":["anvur-scientific","cwts-core","doaj","dongbi-a","jufo-1","ki-jl-1","norway-2","oarl","poland-140","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320083","host_organization_name":"IOP Publishing","host_organization_lineage":["https://openalex.org/P4310320083","https://openalex.org/P4310311669"],"host_organization_lineage_names":["IOP Publishing","Institute of Physics"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"The Astrophysical Journal","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"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/A5112655755","display_name":"Sinclair Smith","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":true,"raw_author_name":"Sinclair Smith","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]}],"institutions":[],"countries_distinct_count":0,"institutions_distinct_count":0,"corresponding_author_ids":["https://openalex.org/A5112655755"],"corresponding_institution_ids":[],"apc_list":{"value":4499,"currency":"USD","value_usd":4499},"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":1,"citation_normalized_percentile":{"value":0.06,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":"76","issue":null,"first_page":"286","last_page":"286"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T12917","display_name":"Astronomy and Astrophysical Research","score":0.9560999870300293,"subfield":{"id":"https://openalex.org/subfields/3105","display_name":"Instrumentation"},"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/T12917","display_name":"Astronomy and Astrophysical Research","score":0.9560999870300293,"subfield":{"id":"https://openalex.org/subfields/3105","display_name":"Instrumentation"},"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/T14163","display_name":"Astronomical Observations and Instrumentation","score":0.018200000748038292,"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/T11484","display_name":"Adaptive optics and wavefront sensing","score":0.006399999838322401,"subfield":{"id":"https://openalex.org/subfields/3107","display_name":"Atomic and Molecular Physics, and Optics"},"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/limiting-magnitude","display_name":"limiting magnitude","score":0.9869999885559082},{"id":"https://openalex.org/keywords/photometric-precision","display_name":"photometric precision","score":0.4429999887943268}],"concepts":[{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.9260144233703613},{"id":"https://openalex.org/C11494860","wikidata":"https://www.wikidata.org/wiki/Q690868","display_name":"Photometer","level":2,"score":0.8041260838508606},{"id":"https://openalex.org/C135448202","wikidata":"https://www.wikidata.org/wiki/Q1545770","display_name":"Limiting magnitude","level":3,"score":0.7370682954788208},{"id":"https://openalex.org/C32848918","wikidata":"https://www.wikidata.org/wiki/Q845789","display_name":"Observable","level":2,"score":0.7115418910980225},{"id":"https://openalex.org/C126691448","wikidata":"https://www.wikidata.org/wiki/Q2028919","display_name":"Magnitude (astronomy)","level":2,"score":0.6670750379562378},{"id":"https://openalex.org/C44870925","wikidata":"https://www.wikidata.org/wiki/Q37547","display_name":"Astrophysics","level":1,"score":0.6351718306541443},{"id":"https://openalex.org/C1276947","wikidata":"https://www.wikidata.org/wiki/Q333","display_name":"Astronomy","level":1,"score":0.6125099658966064},{"id":"https://openalex.org/C188198153","wikidata":"https://www.wikidata.org/wiki/Q1613840","display_name":"Limiting","level":2,"score":0.6063705086708069},{"id":"https://openalex.org/C71570822","wikidata":"https://www.wikidata.org/wiki/Q83213","display_name":"Photoelectric effect","level":2,"score":0.5950849652290344},{"id":"https://openalex.org/C188984411","wikidata":"https://www.wikidata.org/wiki/Q124313","display_name":"Apparent magnitude","level":3,"score":0.45747610926628113},{"id":"https://openalex.org/C150846664","wikidata":"https://www.wikidata.org/wiki/Q7602306","display_name":"Stars","level":2,"score":0.39460620284080505},{"id":"https://openalex.org/C120665830","wikidata":"https://www.wikidata.org/wiki/Q14620","display_name":"Optics","level":1,"score":0.20551177859306335},{"id":"https://openalex.org/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.0},{"id":"https://openalex.org/C78519656","wikidata":"https://www.wikidata.org/wiki/Q101333","display_name":"Mechanical engineering","level":1,"score":0.0},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1086/143420","doi":"https://doi.org/10.1086/143420","is_oa":false,"landing_page_url":"https://doi.org/10.1086/143420","pdf_url":null,"source":{"id":"https://openalex.org/S1980519","display_name":"The Astrophysical Journal","issn_l":"0004-637X","issn":["0004-637X","1538-4357"],"is_oa":false,"is_in_doaj":true,"is_core":true,"listed_in":["anvur-scientific","cwts-core","doaj","dongbi-a","jufo-1","ki-jl-1","norway-2","oarl","poland-140","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320083","host_organization_name":"IOP Publishing","host_organization_lineage":["https://openalex.org/P4310320083","https://openalex.org/P4310311669"],"host_organization_lineage_names":["IOP Publishing","Institute of Physics"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"The Astrophysical 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/W2037809523","https://openalex.org/W2043695385","https://openalex.org/W2079200207","https://openalex.org/W3196733669","https://openalex.org/W2002629550","https://openalex.org/W1969763207","https://openalex.org/W3025251199","https://openalex.org/W2995256441","https://openalex.org/W2087989945","https://openalex.org/W2406527146"],"abstract_inverted_index":{"Random":[0],"fluctuations":[1],"in":[2,52],"the":[3,19,35,42,61],"number":[4],"of":[5,22,28,66],"photoelectrons":[6,48],"produced":[7],"per":[8,57],"second":[9],"are":[10,70],"shown":[11],"t\u00b0":[12],"set":[13],"an":[14],"assignable":[15],"lower":[16],"limit":[17],"to":[18,34,54],"useful":[20],"sensitivity":[21],"a":[23,29,64,67],"photoelectric":[24],"cell.":[25],"The":[26],"case":[27],"potassium":[30],"hydride":[31],"cell":[32],"attached":[33],"6o-inch":[36],"reflector":[37],"is":[38],"treated":[39],"numerically,":[40],"and":[41],"minimum":[43],"time":[44],"intervals":[45],"during":[46],"which":[47],"must":[49],"be":[50],"collected":[51],"order":[53],"make":[55],"i":[56],"cent":[58],"measurements":[59],"on":[60],"light":[62],"from":[63],"star":[65],"given":[68],"magnitude":[69],"tabu-":[71],"lated":[72]},"counts_by_year":[],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2016-06-24T00:00:00"}
