{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2013:HLJ3FJBJHTVLQJLO4DLBP7C7TD","short_pith_number":"pith:HLJ3FJBJ","schema_version":"1.0","canonical_sha256":"3ad3b2a4293ceab8256ee0d617fc5f98ce88cdc7b1865e43a886b7bb7543083e","source":{"kind":"arxiv","id":"1310.0270","version":3},"attestation_state":"computed","paper":{"title":"An X-ray view of quasars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.CO","authors_text":"K. P. Singh","submitted_at":"2013-10-01T12:41:27Z","abstract_excerpt":"I present an overview of observational studies of quasars of all types, with particular emphasis on X-ray observational studies. The presentation is based on the most popularly accepted unified picture of quasars - collectively referred to as AGN (active galactic nuclei) in this review. Characteristics of X-ray spectra and X-ray variability obtained from various X-ray satellites over the last 5 decades have been presented and discussed. The contribution of AGN in understanding the cosmic X-ray background is discussed very briefly. Attempt has been made to provide up-to-date information; howeve"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1310.0270","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-10-01T12:41:27Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"ef879925fb1db10a133b56b421a885a6073e8c88cb2998f6bda5fc61660dae6a","abstract_canon_sha256":"6be57647874f5b8bcbbd1e9ce4d3b56748d5d21286b843a2621eefa23ee86557"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:11:23.646452Z","signature_b64":"dvD8Nf11HGEoh5/26aoDWhlnjEeva7suuwfRQWgjpjjUcXV8TTKeFOo7NmC099XhXT6LJfzZN3n6I2j/LIglBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3ad3b2a4293ceab8256ee0d617fc5f98ce88cdc7b1865e43a886b7bb7543083e","last_reissued_at":"2026-05-18T03:11:23.645588Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:11:23.645588Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"An X-ray view of quasars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.CO","authors_text":"K. P. Singh","submitted_at":"2013-10-01T12:41:27Z","abstract_excerpt":"I present an overview of observational studies of quasars of all types, with particular emphasis on X-ray observational studies. The presentation is based on the most popularly accepted unified picture of quasars - collectively referred to as AGN (active galactic nuclei) in this review. Characteristics of X-ray spectra and X-ray variability obtained from various X-ray satellites over the last 5 decades have been presented and discussed. The contribution of AGN in understanding the cosmic X-ray background is discussed very briefly. Attempt has been made to provide up-to-date information; howeve"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1310.0270","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"1310.0270","created_at":"2026-05-18T03:11:23.645746+00:00"},{"alias_kind":"arxiv_version","alias_value":"1310.0270v3","created_at":"2026-05-18T03:11:23.645746+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1310.0270","created_at":"2026-05-18T03:11:23.645746+00:00"},{"alias_kind":"pith_short_12","alias_value":"HLJ3FJBJHTVL","created_at":"2026-05-18T12:27:46.883200+00:00"},{"alias_kind":"pith_short_16","alias_value":"HLJ3FJBJHTVLQJLO","created_at":"2026-05-18T12:27:46.883200+00:00"},{"alias_kind":"pith_short_8","alias_value":"HLJ3FJBJ","created_at":"2026-05-18T12:27:46.883200+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/HLJ3FJBJHTVLQJLO4DLBP7C7TD","json":"https://pith.science/pith/HLJ3FJBJHTVLQJLO4DLBP7C7TD.json","graph_json":"https://pith.science/api/pith-number/HLJ3FJBJHTVLQJLO4DLBP7C7TD/graph.json","events_json":"https://pith.science/api/pith-number/HLJ3FJBJHTVLQJLO4DLBP7C7TD/events.json","paper":"https://pith.science/paper/HLJ3FJBJ"},"agent_actions":{"view_html":"https://pith.science/pith/HLJ3FJBJHTVLQJLO4DLBP7C7TD","download_json":"https://pith.science/pith/HLJ3FJBJHTVLQJLO4DLBP7C7TD.json","view_paper":"https://pith.science/paper/HLJ3FJBJ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1310.0270&json=true","fetch_graph":"https://pith.science/api/pith-number/HLJ3FJBJHTVLQJLO4DLBP7C7TD/graph.json","fetch_events":"https://pith.science/api/pith-number/HLJ3FJBJHTVLQJLO4DLBP7C7TD/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/HLJ3FJBJHTVLQJLO4DLBP7C7TD/action/timestamp_anchor","attest_storage":"https://pith.science/pith/HLJ3FJBJHTVLQJLO4DLBP7C7TD/action/storage_attestation","attest_author":"https://pith.science/pith/HLJ3FJBJHTVLQJLO4DLBP7C7TD/action/author_attestation","sign_citation":"https://pith.science/pith/HLJ3FJBJHTVLQJLO4DLBP7C7TD/action/citation_signature","submit_replication":"https://pith.science/pith/HLJ3FJBJHTVLQJLO4DLBP7C7TD/action/replication_record"}},"created_at":"2026-05-18T03:11:23.645746+00:00","updated_at":"2026-05-18T03:11:23.645746+00:00"}