{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2025:D6YSFMUDXDNKRUG5ZB7N6XVZYO","short_pith_number":"pith:D6YSFMUD","schema_version":"1.0","canonical_sha256":"1fb122b283b8daa8d0ddc87edf5eb9c3b1c894bb9199486a52a6a0ac00ec3c4f","source":{"kind":"arxiv","id":"2505.12689","version":1},"attestation_state":"computed","paper":{"title":"Formation of a Possible Black-hole Ultracompact X-ray Binary with the Shortest Orbital Period","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.HE","authors_text":"Kun Xu, Long Jiang, Wen-Cong Chen, Xing-Peng Yang, Zhi-Fu Gao","submitted_at":"2025-05-19T04:25:16Z","abstract_excerpt":"In the bulge of M31, the Chandra observations discovered a possible black hole (BH) ultracompact X-ray binary (UCXB) Seq.1 with an orbital period of 7.7 minutes and a maximum X-ray luminosity $L_{\\rm X}=1.09^{+0.02}_{-0.01}\\times10^{38}~ \\rm erg\\,s^{-1}$ in the $0.5-8$ keV band. The minimum orbital period of the BH UCXBs predicted by the standard magnetic braking (MB) model is longer than 8.3 minutes. In this work, we investigate whether the convection- and rotation-boosted (CARB) MB prescription can account for the formation of a BH UCXB like Seq.1. Our detailed stellar evolution models indic"},"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":"2505.12689","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-05-19T04:25:16Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"cd5c54e0211d6544e55e85800bb57f17ddbd935caef41b69a17b83460d64a141","abstract_canon_sha256":"9c08c4da37aca44e5c48cd4ab9f3fced94710479386e1fc63ef3e1125994dc44"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:05:08.275283Z","signature_b64":"UprD4BPfDGWwM+Voj2wOwDEth3RN34qyHN3+k7R1r6QHfBGCRSsEPTYJfHG0oIQMm+PZwJbgsNlFrVCIKLdgBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1fb122b283b8daa8d0ddc87edf5eb9c3b1c894bb9199486a52a6a0ac00ec3c4f","last_reissued_at":"2026-07-05T11:05:08.274774Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:05:08.274774Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Formation of a Possible Black-hole Ultracompact X-ray Binary with the Shortest Orbital Period","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.HE","authors_text":"Kun Xu, Long Jiang, Wen-Cong Chen, Xing-Peng Yang, Zhi-Fu Gao","submitted_at":"2025-05-19T04:25:16Z","abstract_excerpt":"In the bulge of M31, the Chandra observations discovered a possible black hole (BH) ultracompact X-ray binary (UCXB) Seq.1 with an orbital period of 7.7 minutes and a maximum X-ray luminosity $L_{\\rm X}=1.09^{+0.02}_{-0.01}\\times10^{38}~ \\rm erg\\,s^{-1}$ in the $0.5-8$ keV band. The minimum orbital period of the BH UCXBs predicted by the standard magnetic braking (MB) model is longer than 8.3 minutes. In this work, we investigate whether the convection- and rotation-boosted (CARB) MB prescription can account for the formation of a BH UCXB like Seq.1. Our detailed stellar evolution models indic"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2505.12689","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2505.12689/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2505.12689","created_at":"2026-07-05T11:05:08.274833+00:00"},{"alias_kind":"arxiv_version","alias_value":"2505.12689v1","created_at":"2026-07-05T11:05:08.274833+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2505.12689","created_at":"2026-07-05T11:05:08.274833+00:00"},{"alias_kind":"pith_short_12","alias_value":"D6YSFMUDXDNK","created_at":"2026-07-05T11:05:08.274833+00:00"},{"alias_kind":"pith_short_16","alias_value":"D6YSFMUDXDNKRUG5","created_at":"2026-07-05T11:05:08.274833+00:00"},{"alias_kind":"pith_short_8","alias_value":"D6YSFMUD","created_at":"2026-07-05T11:05:08.274833+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/D6YSFMUDXDNKRUG5ZB7N6XVZYO","json":"https://pith.science/pith/D6YSFMUDXDNKRUG5ZB7N6XVZYO.json","graph_json":"https://pith.science/api/pith-number/D6YSFMUDXDNKRUG5ZB7N6XVZYO/graph.json","events_json":"https://pith.science/api/pith-number/D6YSFMUDXDNKRUG5ZB7N6XVZYO/events.json","paper":"https://pith.science/paper/D6YSFMUD"},"agent_actions":{"view_html":"https://pith.science/pith/D6YSFMUDXDNKRUG5ZB7N6XVZYO","download_json":"https://pith.science/pith/D6YSFMUDXDNKRUG5ZB7N6XVZYO.json","view_paper":"https://pith.science/paper/D6YSFMUD","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2505.12689&json=true","fetch_graph":"https://pith.science/api/pith-number/D6YSFMUDXDNKRUG5ZB7N6XVZYO/graph.json","fetch_events":"https://pith.science/api/pith-number/D6YSFMUDXDNKRUG5ZB7N6XVZYO/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/D6YSFMUDXDNKRUG5ZB7N6XVZYO/action/timestamp_anchor","attest_storage":"https://pith.science/pith/D6YSFMUDXDNKRUG5ZB7N6XVZYO/action/storage_attestation","attest_author":"https://pith.science/pith/D6YSFMUDXDNKRUG5ZB7N6XVZYO/action/author_attestation","sign_citation":"https://pith.science/pith/D6YSFMUDXDNKRUG5ZB7N6XVZYO/action/citation_signature","submit_replication":"https://pith.science/pith/D6YSFMUDXDNKRUG5ZB7N6XVZYO/action/replication_record"}},"created_at":"2026-07-05T11:05:08.274833+00:00","updated_at":"2026-07-05T11:05:08.274833+00:00"}