{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2011:5QOUC3LOCEBFQP75YJIZ3UIFS2","short_pith_number":"pith:5QOUC3LO","schema_version":"1.0","canonical_sha256":"ec1d416d6e1102583ffdc2519dd1059699d6b4f91f167f40ba9f377683d1dbe8","source":{"kind":"arxiv","id":"1103.5565","version":3},"attestation_state":"computed","paper":{"title":"Blazars in the early Universe","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Francesco Haardt, Gabriele Ghisellini, Marta Volonteri, Roberto Della Ceca","submitted_at":"2011-03-29T08:37:21Z","abstract_excerpt":"We investigate the relative occurrence of radio--loud and radio-quiet quasars in the first billion years of the Universe, powered by black holes heavier than one billion solar masses. We consider the sample of high-redshfit blazars detected in the hard X-ray band in the 3-years all sky survey performed by the Burst Alert Telescope (BAT) onboard the Swift satellite. All the black holes powering these blazars exceed a billion solar mass, with accretion luminosities close to the Eddington limit. For each blazar pointing at us, there must be hundreds of similar sources (having black holes of simil"},"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":"1103.5565","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-03-29T08:37:21Z","cross_cats_sorted":[],"title_canon_sha256":"888811c13194694b57bb0cc97aebdb0eef9e35cce22b786cb9db8eb16ada2be7","abstract_canon_sha256":"a072bb0523e5920699e6227e98849527a04f3818654d20f8b1bee37d5d8bc0d5"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:02:43.655075Z","signature_b64":"mX3gDxkqGZEfOu2xdN67HNS2uUqztwmjde1Rr5QYquDrV0vy2R+1WXbW1aLONddF2OTsfj0cjo36MJzwL2isDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ec1d416d6e1102583ffdc2519dd1059699d6b4f91f167f40ba9f377683d1dbe8","last_reissued_at":"2026-05-18T02:02:43.654254Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:02:43.654254Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Blazars in the early Universe","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Francesco Haardt, Gabriele Ghisellini, Marta Volonteri, Roberto Della Ceca","submitted_at":"2011-03-29T08:37:21Z","abstract_excerpt":"We investigate the relative occurrence of radio--loud and radio-quiet quasars in the first billion years of the Universe, powered by black holes heavier than one billion solar masses. We consider the sample of high-redshfit blazars detected in the hard X-ray band in the 3-years all sky survey performed by the Burst Alert Telescope (BAT) onboard the Swift satellite. All the black holes powering these blazars exceed a billion solar mass, with accretion luminosities close to the Eddington limit. For each blazar pointing at us, there must be hundreds of similar sources (having black holes of simil"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1103.5565","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":"1103.5565","created_at":"2026-05-18T02:02:43.654393+00:00"},{"alias_kind":"arxiv_version","alias_value":"1103.5565v3","created_at":"2026-05-18T02:02:43.654393+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1103.5565","created_at":"2026-05-18T02:02:43.654393+00:00"},{"alias_kind":"pith_short_12","alias_value":"5QOUC3LOCEBF","created_at":"2026-05-18T12:26:20.644004+00:00"},{"alias_kind":"pith_short_16","alias_value":"5QOUC3LOCEBFQP75","created_at":"2026-05-18T12:26:20.644004+00:00"},{"alias_kind":"pith_short_8","alias_value":"5QOUC3LO","created_at":"2026-05-18T12:26:20.644004+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/5QOUC3LOCEBFQP75YJIZ3UIFS2","json":"https://pith.science/pith/5QOUC3LOCEBFQP75YJIZ3UIFS2.json","graph_json":"https://pith.science/api/pith-number/5QOUC3LOCEBFQP75YJIZ3UIFS2/graph.json","events_json":"https://pith.science/api/pith-number/5QOUC3LOCEBFQP75YJIZ3UIFS2/events.json","paper":"https://pith.science/paper/5QOUC3LO"},"agent_actions":{"view_html":"https://pith.science/pith/5QOUC3LOCEBFQP75YJIZ3UIFS2","download_json":"https://pith.science/pith/5QOUC3LOCEBFQP75YJIZ3UIFS2.json","view_paper":"https://pith.science/paper/5QOUC3LO","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1103.5565&json=true","fetch_graph":"https://pith.science/api/pith-number/5QOUC3LOCEBFQP75YJIZ3UIFS2/graph.json","fetch_events":"https://pith.science/api/pith-number/5QOUC3LOCEBFQP75YJIZ3UIFS2/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/5QOUC3LOCEBFQP75YJIZ3UIFS2/action/timestamp_anchor","attest_storage":"https://pith.science/pith/5QOUC3LOCEBFQP75YJIZ3UIFS2/action/storage_attestation","attest_author":"https://pith.science/pith/5QOUC3LOCEBFQP75YJIZ3UIFS2/action/author_attestation","sign_citation":"https://pith.science/pith/5QOUC3LOCEBFQP75YJIZ3UIFS2/action/citation_signature","submit_replication":"https://pith.science/pith/5QOUC3LOCEBFQP75YJIZ3UIFS2/action/replication_record"}},"created_at":"2026-05-18T02:02:43.654393+00:00","updated_at":"2026-05-18T02:02:43.654393+00:00"}