Get quick answers to your questions about the article from our AI researcher chatbot
{'id': 'https://openalex.org/W2082258883', 'doi': 'https://doi.org/10.1038/226335b0', 'title': 'Quasars behind Clusters of Galaxies', 'display_name': 'Quasars behind Clusters of Galaxies', 'publication_year': 1970, 'publication_date': '1970-04-01', 'ids': {'openalex': 'https://openalex.org/W2082258883', 'doi': 'https://doi.org/10.1038/226335b0', 'mag': '2082258883', 'pmid': 'https://pubmed.ncbi.nlm.nih.gov/16057244'}, 'language': 'en', 'primary_location': {'is_oa': False, 'landing_page_url': 'https://doi.org/10.1038/226335b0', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S137773608', 'display_name': 'Nature', 'issn_l': '0028-0836', 'issn': ['0028-0836', '1476-4687'], 'is_oa': False, 'is_in_doaj': False, 'is_core': True, 'host_organization': 'https://openalex.org/P4310319908', 'host_organization_name': 'Nature Portfolio', 'host_organization_lineage': ['https://openalex.org/P4310319908', 'https://openalex.org/P4310319965'], 'host_organization_lineage_names': ['Nature Portfolio', 'Springer Nature'], 'type': 'journal'}, 'license': None, 'license_id': None, 'version': None, 'is_accepted': False, 'is_published': False}, 'type': 'article', 'type_crossref': 'journal-article', 'indexed_in': ['crossref', 'pubmed'], 'open_access': {'is_oa': False, 'oa_status': 'closed', 'oa_url': None, 'any_repository_has_fulltext': False}, 'authorships': [{'author_position': 'first', 'author': {'id': 'https://openalex.org/A5085992472', 'display_name': 'J. M. Barnothy', 'orcid': None}, 'institutions': [], 'countries': [], 'is_corresponding': False, 'raw_author_name': 'Jeno M. Barnothy', 'raw_affiliation_strings': ['Evanston'], 'affiliations': [{'raw_affiliation_string': 'Evanston', 'institution_ids': []}]}, {'author_position': 'last', 'author': {'id': 'https://openalex.org/A5015134591', 'display_name': 'M. F. Barnothy', 'orcid': None}, 'institutions': [{'id': 'https://openalex.org/I39422238', 'display_name': 'University of Illinois at Chicago', 'ror': 'https://ror.org/02mpq6x41', 'country_code': 'US', 'type': 'education', 'lineage': ['https://openalex.org/I39422238']}], 'countries': ['US'], 'is_corresponding': False, 'raw_author_name': 'M. F. Barnothy', 'raw_affiliation_strings': ['Univ of Illinois, Chicago'], 'affiliations': [{'raw_affiliation_string': 'Univ of Illinois, Chicago', 'institution_ids': ['https://openalex.org/I39422238']}]}], 'countries_distinct_count': 1, 'institutions_distinct_count': 1, 'corresponding_author_ids': [], 'corresponding_institution_ids': [], 'apc_list': {'value': 9750, 'currency': 'EUR', 'value_usd': 11690, 'provenance': 'doaj'}, 'apc_paid': None, 'fwci': 0.809, 'has_fulltext': False, 'cited_by_count': 6, 'citation_normalized_percentile': {'value': 0.689042, 'is_in_top_1_percent': False, 'is_in_top_10_percent': False}, 'cited_by_percentile_year': {'min': 80, 'max': 81}, 'biblio': {'volume': '226', 'issue': '5243', 'first_page': '335', 'last_page': '337'}, 'is_retracted': False, 'is_paratext': False, 'primary_topic': {'id': 'https://openalex.org/T10026', 'display_name': 'Galaxy Formation and Evolution in the Universe', 'score': 0.9996, '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/T10026', 'display_name': 'Galaxy Formation and Evolution in the Universe', 'score': 0.9996, '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/T10025', 'display_name': 'Holographic Derivation of Field Theories and Gravity', 'score': 0.9995, 'subfield': {'id': 'https://openalex.org/subfields/3106', 'display_name': 'Nuclear and High Energy Physics'}, '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/T10095', 'display_name': 'Cosmological Parameters and Dark Energy', 'score': 0.9984, '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/qsos', 'display_name': 'QSOS', 'score': 0.9798042}, {'id': 'https://openalex.org/keywords/quasars', 'display_name': 'Quasars', 'score': 0.503389}], 'concepts': [{'id': 'https://openalex.org/C2776968204', 'wikidata': 'https://www.wikidata.org/wiki/Q3412366', 'display_name': 'QSOS', 'level': 4, 'score': 0.9798042}, {'id': 'https://openalex.org/C121332964', 'wikidata': 'https://www.wikidata.org/wiki/Q413', 'display_name': 'Physics', 'level': 0, 'score': 0.85461956}, {'id': 'https://openalex.org/C44870925', 'wikidata': 'https://www.wikidata.org/wiki/Q37547', 'display_name': 'Astrophysics', 'level': 1, 'score': 0.8301611}, {'id': 'https://openalex.org/C135041427', 'wikidata': 'https://www.wikidata.org/wiki/Q83373', 'display_name': 'Quasar', 'level': 3, 'score': 0.7990042}, {'id': 'https://openalex.org/C33024259', 'wikidata': 'https://www.wikidata.org/wiki/Q76250', 'display_name': 'Redshift', 'level': 3, 'score': 0.73982}, {'id': 'https://openalex.org/C98444146', 'wikidata': 'https://www.wikidata.org/wiki/Q318', 'display_name': 'Galaxy', 'level': 2, 'score': 0.6545694}, {'id': 'https://openalex.org/C156055797', 'wikidata': 'https://www.wikidata.org/wiki/Q204107', 'display_name': 'Galaxy cluster', 'level': 3, 'score': 0.5572416}, {'id': 'https://openalex.org/C1276947', 'wikidata': 'https://www.wikidata.org/wiki/Q333', 'display_name': 'Astronomy', 'level': 1, 'score': 0.50793463}, {'id': 'https://openalex.org/C68498078', 'wikidata': 'https://www.wikidata.org/wiki/Q185243', 'display_name': 'Gravitational lens', 'level': 4, 'score': 0.4395803}, {'id': 'https://openalex.org/C83160514', 'wikidata': 'https://www.wikidata.org/wiki/Q17512228', 'display_name': 'Galaxy groups and clusters', 'level': 4, 'score': 0.43639663}, {'id': 'https://openalex.org/C164866538', 'wikidata': 'https://www.wikidata.org/wiki/Q367351', 'display_name': 'Cluster (spacecraft)', 'level': 2, 'score': 0.4285517}, {'id': 'https://openalex.org/C41008148', 'wikidata': 'https://www.wikidata.org/wiki/Q21198', 'display_name': 'Computer science', 'level': 0, 'score': 0.0}, {'id': 'https://openalex.org/C199360897', 'wikidata': 'https://www.wikidata.org/wiki/Q9143', 'display_name': 'Programming language', 'level': 1, 'score': 0.0}], 'mesh': [], 'locations_count': 2, 'locations': [{'is_oa': False, 'landing_page_url': 'https://doi.org/10.1038/226335b0', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S137773608', 'display_name': 'Nature', 'issn_l': '0028-0836', 'issn': ['0028-0836', '1476-4687'], 'is_oa': False, 'is_in_doaj': False, 'is_core': True, 'host_organization': 'https://openalex.org/P4310319908', 'host_organization_name': 'Nature Portfolio', 'host_organization_lineage': ['https://openalex.org/P4310319908', 'https://openalex.org/P4310319965'], 'host_organization_lineage_names': ['Nature Portfolio', 'Springer Nature'], 'type': 'journal'}, 'license': None, 'license_id': None, 'version': None, 'is_accepted': False, 'is_published': False}, {'is_oa': False, 'landing_page_url': 'https://pubmed.ncbi.nlm.nih.gov/16057244', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S4306525036', 'display_name': 'PubMed', 'issn_l': None, 'issn': None, 'is_oa': False, 'is_in_doaj': False, 'is_core': False, 'host_organization': 'https://openalex.org/I1299303238', 'host_organization_name': 'National Institutes of Health', 'host_organization_lineage': ['https://openalex.org/I1299303238'], 'host_organization_lineage_names': ['National Institutes of Health'], 'type': 'repository'}, 'license': None, 'license_id': None, 'version': None, 'is_accepted': False, 'is_published': False}], 'best_oa_location': None, 'sustainable_development_goals': [], 'grants': [], 'datasets': [], 'versions': [], 'referenced_works_count': 17, 'referenced_works': ['https://openalex.org/W1964917670', 'https://openalex.org/W1974854674', 'https://openalex.org/W1983217628', 'https://openalex.org/W1985367237', 'https://openalex.org/W1988428268', 'https://openalex.org/W2012406406', 'https://openalex.org/W2018550426', 'https://openalex.org/W2026012148', 'https://openalex.org/W2026636086', 'https://openalex.org/W2028640807', 'https://openalex.org/W2037573376', 'https://openalex.org/W2050896946', 'https://openalex.org/W2062689438', 'https://openalex.org/W2087863926', 'https://openalex.org/W2092031361', 'https://openalex.org/W4254076003', 'https://openalex.org/W4256284809'], 'related_works': ['https://openalex.org/W3184684170', 'https://openalex.org/W2807559451', 'https://openalex.org/W2376056942', 'https://openalex.org/W2170238087', 'https://openalex.org/W2088487386', 'https://openalex.org/W2031940872', 'https://openalex.org/W2026467960', 'https://openalex.org/W2015835837', 'https://openalex.org/W1965664285', 'https://openalex.org/W1650686478'], 'abstract_inverted_index': None, 'cited_by_api_url': 'https://api.openalex.org/works?filter=cites:W2082258883', 'counts_by_year': [], 'updated_date': '2024-08-13T23:42:33.401510', 'created_date': '2016-06-24'}