{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:ILF2QRYGHYOFBXCROZNL7C53VI","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"0fcf53c72431fd117ca752c77dc95e60420d533d311dc70c646715c0f891be8d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-07-08T18:00:01Z","title_canon_sha256":"e011622c9ef485b7d5745a61c4562de1c1143d5c301c2bb32f665697603de8f9"},"schema_version":"1.0","source":{"id":"2007.04324","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2007.04324","created_at":"2026-07-05T01:33:07Z"},{"alias_kind":"arxiv_version","alias_value":"2007.04324v2","created_at":"2026-07-05T01:33:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2007.04324","created_at":"2026-07-05T01:33:07Z"},{"alias_kind":"pith_short_12","alias_value":"ILF2QRYGHYOF","created_at":"2026-07-05T01:33:07Z"},{"alias_kind":"pith_short_16","alias_value":"ILF2QRYGHYOFBXCR","created_at":"2026-07-05T01:33:07Z"},{"alias_kind":"pith_short_8","alias_value":"ILF2QRYG","created_at":"2026-07-05T01:33:07Z"}],"graph_snapshots":[{"event_id":"sha256:731df9032c2506d6acf58c0da468d14f30916c1f1b21effb24ad6a7716ddd61b","target":"graph","created_at":"2026-07-05T01:33:07Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2007.04324/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The black hole candidate EXO 1846-031 underwent an outburst in 2019, after at least 25 years in quiescence. We observed the system using \\textit{NuSTAR} on August 3rd, 2019. The 3--79 keV spectrum shows strong relativistic reflection features. Our baseline model gives a nearly maximal black hole spin value of $a=0.997_{-0.002}^{+0.001}$ ($1\\sigma$ statistical errors). This high value nominally excludes the possibility of the central engine harboring a neutron star. Using several models, we test the robustness of our measurement to assumptions about the density of the accretion disk, the nature","authors_text":"Abderahmen Zoghbi, Edward M. Cackett, Elias S. Kammoun, John A. Tomsick, Jon M. Miller, Mark T. Reynolds, Paul A. Draghis","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-07-08T18:00:01Z","title":"A New Spin on an Old Black Hole: NuSTAR Spectroscopy of EXO 1846-031"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.04324","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:995031650b3171c4fde1788685deb73efb94a1696680f75dd32542bbeb361d08","target":"record","created_at":"2026-07-05T01:33:07Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"0fcf53c72431fd117ca752c77dc95e60420d533d311dc70c646715c0f891be8d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-07-08T18:00:01Z","title_canon_sha256":"e011622c9ef485b7d5745a61c4562de1c1143d5c301c2bb32f665697603de8f9"},"schema_version":"1.0","source":{"id":"2007.04324","kind":"arxiv","version":2}},"canonical_sha256":"42cba847063e1c50dc51765abf8bbbaa02efbe895b241bbdce36c66b3549072c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"42cba847063e1c50dc51765abf8bbbaa02efbe895b241bbdce36c66b3549072c","first_computed_at":"2026-07-05T01:33:07.333475Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:33:07.333475Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3+Hz4aXvPwKmJs2sF21L53cEytZkJB5oz+6V9L+kxpp1bgnt8JHg8uVCoOrOy4B9TxVWsLukdQAtnnpvQ+/cDg==","signature_status":"signed_v1","signed_at":"2026-07-05T01:33:07.334029Z","signed_message":"canonical_sha256_bytes"},"source_id":"2007.04324","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:995031650b3171c4fde1788685deb73efb94a1696680f75dd32542bbeb361d08","sha256:731df9032c2506d6acf58c0da468d14f30916c1f1b21effb24ad6a7716ddd61b"],"state_sha256":"a7a076276ae1500796c3265c5999bb6154827c9f7c50d39cd6d673042455f9e0"}