{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2011:P3AJE2P2RPIYKDOVMQJ6LATGUA","short_pith_number":"pith:P3AJE2P2","schema_version":"1.0","canonical_sha256":"7ec09269fa8bd1850dd56413e58266a00af3d51d6e7e7f4c1d7b58c653a1a542","source":{"kind":"arxiv","id":"1109.1610","version":2},"attestation_state":"computed","paper":{"title":"Ultraluminous X-ray Sources in the Chandra and XMM-Newton Era","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.HE","authors_text":"Hua Feng, Roberto Soria","submitted_at":"2011-09-08T01:26:46Z","abstract_excerpt":"Ultraluminous X-ray sources (ULXs) are accreting black holes that may contain the missing population of intermediate mass black holes or reflect super-Eddington accretion physics. Ten years of Chandra and XMM-Newton observations of ULXs, integrated by multiband studies of their counterparts, have produced a wealth of observational data and phenomenological classifications. We review the properties of their host galaxies, list popular spectral models and implications for standard and supercritical accretion physics, demonstrate how X-ray timing of these objects places constraints on their masse"},"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":"1109.1610","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-09-08T01:26:46Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"43bb9c286c3f8d08cc616840f16840f40ece210fcce9e1af237203ea54a1f62d","abstract_canon_sha256":"499614034bc03e6b562890c61c508baeca850699b984a4089c95fa225d585ee6"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:00:38.099093Z","signature_b64":"spzzUBly75vesHiJ1uElZnjhnjquHNynqUtxyibqswIIeT5SfGtCxnQYufDqV/SRzBUqsmq2uYKAvsBAcPQGBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7ec09269fa8bd1850dd56413e58266a00af3d51d6e7e7f4c1d7b58c653a1a542","last_reissued_at":"2026-05-18T02:00:38.098479Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:00:38.098479Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Ultraluminous X-ray Sources in the Chandra and XMM-Newton Era","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.HE","authors_text":"Hua Feng, Roberto Soria","submitted_at":"2011-09-08T01:26:46Z","abstract_excerpt":"Ultraluminous X-ray sources (ULXs) are accreting black holes that may contain the missing population of intermediate mass black holes or reflect super-Eddington accretion physics. Ten years of Chandra and XMM-Newton observations of ULXs, integrated by multiband studies of their counterparts, have produced a wealth of observational data and phenomenological classifications. We review the properties of their host galaxies, list popular spectral models and implications for standard and supercritical accretion physics, demonstrate how X-ray timing of these objects places constraints on their masse"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.1610","kind":"arxiv","version":2},"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":"1109.1610","created_at":"2026-05-18T02:00:38.098568+00:00"},{"alias_kind":"arxiv_version","alias_value":"1109.1610v2","created_at":"2026-05-18T02:00:38.098568+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1109.1610","created_at":"2026-05-18T02:00:38.098568+00:00"},{"alias_kind":"pith_short_12","alias_value":"P3AJE2P2RPIY","created_at":"2026-05-18T12:26:39.201973+00:00"},{"alias_kind":"pith_short_16","alias_value":"P3AJE2P2RPIYKDOV","created_at":"2026-05-18T12:26:39.201973+00:00"},{"alias_kind":"pith_short_8","alias_value":"P3AJE2P2","created_at":"2026-05-18T12:26:39.201973+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/P3AJE2P2RPIYKDOVMQJ6LATGUA","json":"https://pith.science/pith/P3AJE2P2RPIYKDOVMQJ6LATGUA.json","graph_json":"https://pith.science/api/pith-number/P3AJE2P2RPIYKDOVMQJ6LATGUA/graph.json","events_json":"https://pith.science/api/pith-number/P3AJE2P2RPIYKDOVMQJ6LATGUA/events.json","paper":"https://pith.science/paper/P3AJE2P2"},"agent_actions":{"view_html":"https://pith.science/pith/P3AJE2P2RPIYKDOVMQJ6LATGUA","download_json":"https://pith.science/pith/P3AJE2P2RPIYKDOVMQJ6LATGUA.json","view_paper":"https://pith.science/paper/P3AJE2P2","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1109.1610&json=true","fetch_graph":"https://pith.science/api/pith-number/P3AJE2P2RPIYKDOVMQJ6LATGUA/graph.json","fetch_events":"https://pith.science/api/pith-number/P3AJE2P2RPIYKDOVMQJ6LATGUA/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/P3AJE2P2RPIYKDOVMQJ6LATGUA/action/timestamp_anchor","attest_storage":"https://pith.science/pith/P3AJE2P2RPIYKDOVMQJ6LATGUA/action/storage_attestation","attest_author":"https://pith.science/pith/P3AJE2P2RPIYKDOVMQJ6LATGUA/action/author_attestation","sign_citation":"https://pith.science/pith/P3AJE2P2RPIYKDOVMQJ6LATGUA/action/citation_signature","submit_replication":"https://pith.science/pith/P3AJE2P2RPIYKDOVMQJ6LATGUA/action/replication_record"}},"created_at":"2026-05-18T02:00:38.098568+00:00","updated_at":"2026-05-18T02:00:38.098568+00:00"}