{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:YSFOJK6FPDHYIMI2QPDYWS5T6P","short_pith_number":"pith:YSFOJK6F","schema_version":"1.0","canonical_sha256":"c48ae4abc578cf84311a83c78b4bb3f3da1d6d05a54863424bb2b182d546df98","source":{"kind":"arxiv","id":"1904.11311","version":1},"attestation_state":"computed","paper":{"title":"On the curious pulsation properties of the accreting millisecond pulsar IGR J17379-3747","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Craig B. Markwardt, Deepto Chakrabarty, Diego Altamirano, Gaurava K. Jaisawal, Keith C. Gendreau, Paul. S. Ray, Peter Bult, Sebastien Guillot, Tod E. Strohmayer, Zaven Arzoumanian","submitted_at":"2019-04-25T13:03:13Z","abstract_excerpt":"We report on the Neutron Star Interior Composition Explorer (NICER) monitoring campaign of the 468 Hz accreting millisecond X-ray pulsar IGR J17379-3747. From a detailed spectral and timing analysis of the coherent pulsations we find that they show a strong energy dependence, with soft thermal emission lagging about 640 microseconds behind the hard, Comptonized emission. Additionally, we observe uncommonly large pulse fractions, with measured amplitudes in excess of 20% sinusoidal fractional amplitude across the NICER passband and fluctuations of up to ~70%. Based on a phase-resolved spectral "},"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":"1904.11311","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-04-25T13:03:13Z","cross_cats_sorted":[],"title_canon_sha256":"85b9f016ecffc3465117961878f4e9e9596d2b0c15417b13e485a0824afb28e7","abstract_canon_sha256":"e386074071f0afea8a079f98219c9df6563cf450827fe1e2682e8a6f93aa5e89"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:44:11.157964Z","signature_b64":"+s53WwDSOq/bSFFt0V8yUAl2NNELdzgEsRbDjRCfhn3JgL2vHhzt68ZX5SaZjFPwQoopv+w4/rOQveNmeDKEAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c48ae4abc578cf84311a83c78b4bb3f3da1d6d05a54863424bb2b182d546df98","last_reissued_at":"2026-05-17T23:44:11.157307Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:44:11.157307Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"On the curious pulsation properties of the accreting millisecond pulsar IGR J17379-3747","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Craig B. Markwardt, Deepto Chakrabarty, Diego Altamirano, Gaurava K. Jaisawal, Keith C. Gendreau, Paul. S. Ray, Peter Bult, Sebastien Guillot, Tod E. Strohmayer, Zaven Arzoumanian","submitted_at":"2019-04-25T13:03:13Z","abstract_excerpt":"We report on the Neutron Star Interior Composition Explorer (NICER) monitoring campaign of the 468 Hz accreting millisecond X-ray pulsar IGR J17379-3747. From a detailed spectral and timing analysis of the coherent pulsations we find that they show a strong energy dependence, with soft thermal emission lagging about 640 microseconds behind the hard, Comptonized emission. Additionally, we observe uncommonly large pulse fractions, with measured amplitudes in excess of 20% sinusoidal fractional amplitude across the NICER passband and fluctuations of up to ~70%. Based on a phase-resolved spectral "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.11311","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":"1904.11311","created_at":"2026-05-17T23:44:11.157411+00:00"},{"alias_kind":"arxiv_version","alias_value":"1904.11311v1","created_at":"2026-05-17T23:44:11.157411+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.11311","created_at":"2026-05-17T23:44:11.157411+00:00"},{"alias_kind":"pith_short_12","alias_value":"YSFOJK6FPDHY","created_at":"2026-05-18T12:33:33.725879+00:00"},{"alias_kind":"pith_short_16","alias_value":"YSFOJK6FPDHYIMI2","created_at":"2026-05-18T12:33:33.725879+00:00"},{"alias_kind":"pith_short_8","alias_value":"YSFOJK6F","created_at":"2026-05-18T12:33:33.725879+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/YSFOJK6FPDHYIMI2QPDYWS5T6P","json":"https://pith.science/pith/YSFOJK6FPDHYIMI2QPDYWS5T6P.json","graph_json":"https://pith.science/api/pith-number/YSFOJK6FPDHYIMI2QPDYWS5T6P/graph.json","events_json":"https://pith.science/api/pith-number/YSFOJK6FPDHYIMI2QPDYWS5T6P/events.json","paper":"https://pith.science/paper/YSFOJK6F"},"agent_actions":{"view_html":"https://pith.science/pith/YSFOJK6FPDHYIMI2QPDYWS5T6P","download_json":"https://pith.science/pith/YSFOJK6FPDHYIMI2QPDYWS5T6P.json","view_paper":"https://pith.science/paper/YSFOJK6F","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1904.11311&json=true","fetch_graph":"https://pith.science/api/pith-number/YSFOJK6FPDHYIMI2QPDYWS5T6P/graph.json","fetch_events":"https://pith.science/api/pith-number/YSFOJK6FPDHYIMI2QPDYWS5T6P/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/YSFOJK6FPDHYIMI2QPDYWS5T6P/action/timestamp_anchor","attest_storage":"https://pith.science/pith/YSFOJK6FPDHYIMI2QPDYWS5T6P/action/storage_attestation","attest_author":"https://pith.science/pith/YSFOJK6FPDHYIMI2QPDYWS5T6P/action/author_attestation","sign_citation":"https://pith.science/pith/YSFOJK6FPDHYIMI2QPDYWS5T6P/action/citation_signature","submit_replication":"https://pith.science/pith/YSFOJK6FPDHYIMI2QPDYWS5T6P/action/replication_record"}},"created_at":"2026-05-17T23:44:11.157411+00:00","updated_at":"2026-05-17T23:44:11.157411+00:00"}