{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2011:UE3MKPIWXFCST5GA7FTYPP5G5G","short_pith_number":"pith:UE3MKPIW","schema_version":"1.0","canonical_sha256":"a136c53d16b94529f4c0f96787bfa6e9bdeac2a8c3a8e243f4b77b8c5fd45e8d","source":{"kind":"arxiv","id":"1104.0751","version":1},"attestation_state":"computed","paper":{"title":"The Brightest Cluster X-ray Sources","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Andrew King","submitted_at":"2011-04-05T07:35:58Z","abstract_excerpt":"There have been several recent claims of black hole binaries in globular clusters. I show that these candidate systems could instead be ultracompact X-ray binaries (UCXBs) in which a neutron star accretes from a white dwarf. They would represent a slightly earlier evolutionary stage of known globular cluster UCXBs such as 4U 1820--30, with white dwarf masses $\\sim 0.2\\msun$, and orbital periods below 5 minutes. Accretion is slightly super--Eddington, and makes these systems ultraluminous sources (ULXs) with rather mild beaming factors $b \\sim 0.3$. Their theoretical luminosity function flatten"},"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":"1104.0751","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-04-05T07:35:58Z","cross_cats_sorted":[],"title_canon_sha256":"30ea245156f06539ee55ca02c570108958578735cceb4b1f5f60cb129ef52616","abstract_canon_sha256":"18cc7259d803ae1f019ba62bf1ce14bb2447be26e4a24bf65de2755fff026287"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:02:38.055812Z","signature_b64":"iFt2o0WhoT123185Q0ZYFG1plaJDJ8Su/ig3N2X7+fYhu0R+LiFdZx1QgEvyOtsopIHUuvw2WQiEqDMiocQlBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a136c53d16b94529f4c0f96787bfa6e9bdeac2a8c3a8e243f4b77b8c5fd45e8d","last_reissued_at":"2026-05-18T02:02:38.055139Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:02:38.055139Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The Brightest Cluster X-ray Sources","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Andrew King","submitted_at":"2011-04-05T07:35:58Z","abstract_excerpt":"There have been several recent claims of black hole binaries in globular clusters. I show that these candidate systems could instead be ultracompact X-ray binaries (UCXBs) in which a neutron star accretes from a white dwarf. They would represent a slightly earlier evolutionary stage of known globular cluster UCXBs such as 4U 1820--30, with white dwarf masses $\\sim 0.2\\msun$, and orbital periods below 5 minutes. Accretion is slightly super--Eddington, and makes these systems ultraluminous sources (ULXs) with rather mild beaming factors $b \\sim 0.3$. Their theoretical luminosity function flatten"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1104.0751","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":"1104.0751","created_at":"2026-05-18T02:02:38.055227+00:00"},{"alias_kind":"arxiv_version","alias_value":"1104.0751v1","created_at":"2026-05-18T02:02:38.055227+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1104.0751","created_at":"2026-05-18T02:02:38.055227+00:00"},{"alias_kind":"pith_short_12","alias_value":"UE3MKPIWXFCS","created_at":"2026-05-18T12:26:42.757692+00:00"},{"alias_kind":"pith_short_16","alias_value":"UE3MKPIWXFCST5GA","created_at":"2026-05-18T12:26:42.757692+00:00"},{"alias_kind":"pith_short_8","alias_value":"UE3MKPIW","created_at":"2026-05-18T12:26:42.757692+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/UE3MKPIWXFCST5GA7FTYPP5G5G","json":"https://pith.science/pith/UE3MKPIWXFCST5GA7FTYPP5G5G.json","graph_json":"https://pith.science/api/pith-number/UE3MKPIWXFCST5GA7FTYPP5G5G/graph.json","events_json":"https://pith.science/api/pith-number/UE3MKPIWXFCST5GA7FTYPP5G5G/events.json","paper":"https://pith.science/paper/UE3MKPIW"},"agent_actions":{"view_html":"https://pith.science/pith/UE3MKPIWXFCST5GA7FTYPP5G5G","download_json":"https://pith.science/pith/UE3MKPIWXFCST5GA7FTYPP5G5G.json","view_paper":"https://pith.science/paper/UE3MKPIW","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1104.0751&json=true","fetch_graph":"https://pith.science/api/pith-number/UE3MKPIWXFCST5GA7FTYPP5G5G/graph.json","fetch_events":"https://pith.science/api/pith-number/UE3MKPIWXFCST5GA7FTYPP5G5G/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/UE3MKPIWXFCST5GA7FTYPP5G5G/action/timestamp_anchor","attest_storage":"https://pith.science/pith/UE3MKPIWXFCST5GA7FTYPP5G5G/action/storage_attestation","attest_author":"https://pith.science/pith/UE3MKPIWXFCST5GA7FTYPP5G5G/action/author_attestation","sign_citation":"https://pith.science/pith/UE3MKPIWXFCST5GA7FTYPP5G5G/action/citation_signature","submit_replication":"https://pith.science/pith/UE3MKPIWXFCST5GA7FTYPP5G5G/action/replication_record"}},"created_at":"2026-05-18T02:02:38.055227+00:00","updated_at":"2026-05-18T02:02:38.055227+00:00"}