{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2013:WBBTSC4WJ266FVRDRWW7424CS2","short_pith_number":"pith:WBBTSC4W","schema_version":"1.0","canonical_sha256":"b043390b964ebde2d6238dadfe6b82968e1682463724554477c9abc84055e80f","source":{"kind":"arxiv","id":"1301.4179","version":1},"attestation_state":"computed","paper":{"title":"Active Galactic Nuclei - the Physics of Individual Sources and the Cosmic History of Formation and Evolution","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.CO","authors_text":"Ezequiel Treister (Universidad de Concepcion), Henric Krawczynski (Washington University in St. Louis, McDonnell Center for the Space Sciences), Physics Department","submitted_at":"2013-01-17T18:18:40Z","abstract_excerpt":"In this paper we give a brief review of the astrophysics of active galactic nuclei (AGN). After a general introduction motivating the study of AGNs, we discuss our present understanding of the inner workings of the central engines, most likely accreting black holes with masses between a million and ten billion solar masses. We highlight recent results concerning the jets (collimated outflows) of AGNs derived from X-ray observations (Chandra) of kpc-scale jets and gamma-ray observations of AGNs (Fermi, Cherenkov telescopes) with jets closely aligned with the lines of sight (blazars), and discus"},"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":"1301.4179","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-01-17T18:18:40Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"d1207b8292ee1481d4bae8d49cb133db95fad386a8d3ef7692eec8ba616f58aa","abstract_canon_sha256":"352403864cd68963e220b3a965d542abaccaf117062f316185fa0fe460d6b145"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:36:07.007669Z","signature_b64":"rWOyaylfpvCeqrMkU2N1VBxB2fX9H2X9n4uzTj+p/OU2FaCa5LsAjZFAGt2PyNko+AxoJVgiVtJwFKQB/kriBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b043390b964ebde2d6238dadfe6b82968e1682463724554477c9abc84055e80f","last_reissued_at":"2026-05-18T03:36:07.006840Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:36:07.006840Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Active Galactic Nuclei - the Physics of Individual Sources and the Cosmic History of Formation and Evolution","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.CO","authors_text":"Ezequiel Treister (Universidad de Concepcion), Henric Krawczynski (Washington University in St. Louis, McDonnell Center for the Space Sciences), Physics Department","submitted_at":"2013-01-17T18:18:40Z","abstract_excerpt":"In this paper we give a brief review of the astrophysics of active galactic nuclei (AGN). After a general introduction motivating the study of AGNs, we discuss our present understanding of the inner workings of the central engines, most likely accreting black holes with masses between a million and ten billion solar masses. We highlight recent results concerning the jets (collimated outflows) of AGNs derived from X-ray observations (Chandra) of kpc-scale jets and gamma-ray observations of AGNs (Fermi, Cherenkov telescopes) with jets closely aligned with the lines of sight (blazars), and discus"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1301.4179","kind":"arxiv","version":1},"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":"1301.4179","created_at":"2026-05-18T03:36:07.006959+00:00"},{"alias_kind":"arxiv_version","alias_value":"1301.4179v1","created_at":"2026-05-18T03:36:07.006959+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1301.4179","created_at":"2026-05-18T03:36:07.006959+00:00"},{"alias_kind":"pith_short_12","alias_value":"WBBTSC4WJ266","created_at":"2026-05-18T12:28:04.890932+00:00"},{"alias_kind":"pith_short_16","alias_value":"WBBTSC4WJ266FVRD","created_at":"2026-05-18T12:28:04.890932+00:00"},{"alias_kind":"pith_short_8","alias_value":"WBBTSC4W","created_at":"2026-05-18T12:28:04.890932+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2607.03420","citing_title":"PKS 2155-304: Long-Term Optical Photometric Monitoring and Variability Analysis","ref_index":43,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/WBBTSC4WJ266FVRDRWW7424CS2","json":"https://pith.science/pith/WBBTSC4WJ266FVRDRWW7424CS2.json","graph_json":"https://pith.science/api/pith-number/WBBTSC4WJ266FVRDRWW7424CS2/graph.json","events_json":"https://pith.science/api/pith-number/WBBTSC4WJ266FVRDRWW7424CS2/events.json","paper":"https://pith.science/paper/WBBTSC4W"},"agent_actions":{"view_html":"https://pith.science/pith/WBBTSC4WJ266FVRDRWW7424CS2","download_json":"https://pith.science/pith/WBBTSC4WJ266FVRDRWW7424CS2.json","view_paper":"https://pith.science/paper/WBBTSC4W","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1301.4179&json=true","fetch_graph":"https://pith.science/api/pith-number/WBBTSC4WJ266FVRDRWW7424CS2/graph.json","fetch_events":"https://pith.science/api/pith-number/WBBTSC4WJ266FVRDRWW7424CS2/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/WBBTSC4WJ266FVRDRWW7424CS2/action/timestamp_anchor","attest_storage":"https://pith.science/pith/WBBTSC4WJ266FVRDRWW7424CS2/action/storage_attestation","attest_author":"https://pith.science/pith/WBBTSC4WJ266FVRDRWW7424CS2/action/author_attestation","sign_citation":"https://pith.science/pith/WBBTSC4WJ266FVRDRWW7424CS2/action/citation_signature","submit_replication":"https://pith.science/pith/WBBTSC4WJ266FVRDRWW7424CS2/action/replication_record"}},"created_at":"2026-05-18T03:36:07.006959+00:00","updated_at":"2026-05-18T03:36:07.006959+00:00"}