{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2017:6SYJJ5QJZ3GUSKXSPVGHXRMYAI","short_pith_number":"pith:6SYJJ5QJ","schema_version":"1.0","canonical_sha256":"f4b094f609cecd492af27d4c7bc598022f8f0eaf6ff21598f6090cafc229996f","source":{"kind":"arxiv","id":"1712.08918","version":1},"attestation_state":"computed","paper":{"title":"Search For Gravitational Redshifted Absorption Lines In LMXB Serpens X-1","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-ex","nucl-th"],"primary_cat":"astro-ph.HE","authors_text":"Chris Done, Frits Paerels, Hiroki Yoneda, Shin Watanabe, Tadayuki Takahashi","submitted_at":"2017-12-24T13:32:29Z","abstract_excerpt":"The equation of state for ultra-dense matter can be tested from observations of the ratio of mass to radius of neutron stars. This could be measured precisely from the redshift of a narrow line produced on the surface. X-rays bursts have been intensively searched for such features, but so far without detection. Here instead we search for redshifted lines in the persistent emission, where the accretion flow dominates over the surface emission. We discuss the requirements for narrow lines to be produced, and show that narrow absorption lines from highly ionized iron can potentially be observable"},"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":"1712.08918","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-12-24T13:32:29Z","cross_cats_sorted":["nucl-ex","nucl-th"],"title_canon_sha256":"6d80dc9ce4a11f7c2592c7edc2239a44da095bf4339cf73dda859d5ecf929b07","abstract_canon_sha256":"9d87c350bd7aaf6717ca3300e989a6cb090300c222556b949fd030c68f6e7697"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:23:28.220518Z","signature_b64":"5GLfxVAC389Rv8yUFY/X4ZjZr7QmRlj8lZBfX4w5SD9gDofkQNME8vP30hjqao2FpotUZ2ABTTAhcQ19TV0YDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f4b094f609cecd492af27d4c7bc598022f8f0eaf6ff21598f6090cafc229996f","last_reissued_at":"2026-05-18T00:23:28.219785Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:23:28.219785Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Search For Gravitational Redshifted Absorption Lines In LMXB Serpens X-1","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-ex","nucl-th"],"primary_cat":"astro-ph.HE","authors_text":"Chris Done, Frits Paerels, Hiroki Yoneda, Shin Watanabe, Tadayuki Takahashi","submitted_at":"2017-12-24T13:32:29Z","abstract_excerpt":"The equation of state for ultra-dense matter can be tested from observations of the ratio of mass to radius of neutron stars. This could be measured precisely from the redshift of a narrow line produced on the surface. X-rays bursts have been intensively searched for such features, but so far without detection. Here instead we search for redshifted lines in the persistent emission, where the accretion flow dominates over the surface emission. We discuss the requirements for narrow lines to be produced, and show that narrow absorption lines from highly ionized iron can potentially be observable"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1712.08918","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":"1712.08918","created_at":"2026-05-18T00:23:28.219893+00:00"},{"alias_kind":"arxiv_version","alias_value":"1712.08918v1","created_at":"2026-05-18T00:23:28.219893+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1712.08918","created_at":"2026-05-18T00:23:28.219893+00:00"},{"alias_kind":"pith_short_12","alias_value":"6SYJJ5QJZ3GU","created_at":"2026-05-18T12:31:03.183658+00:00"},{"alias_kind":"pith_short_16","alias_value":"6SYJJ5QJZ3GUSKXS","created_at":"2026-05-18T12:31:03.183658+00:00"},{"alias_kind":"pith_short_8","alias_value":"6SYJJ5QJ","created_at":"2026-05-18T12:31:03.183658+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/6SYJJ5QJZ3GUSKXSPVGHXRMYAI","json":"https://pith.science/pith/6SYJJ5QJZ3GUSKXSPVGHXRMYAI.json","graph_json":"https://pith.science/api/pith-number/6SYJJ5QJZ3GUSKXSPVGHXRMYAI/graph.json","events_json":"https://pith.science/api/pith-number/6SYJJ5QJZ3GUSKXSPVGHXRMYAI/events.json","paper":"https://pith.science/paper/6SYJJ5QJ"},"agent_actions":{"view_html":"https://pith.science/pith/6SYJJ5QJZ3GUSKXSPVGHXRMYAI","download_json":"https://pith.science/pith/6SYJJ5QJZ3GUSKXSPVGHXRMYAI.json","view_paper":"https://pith.science/paper/6SYJJ5QJ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1712.08918&json=true","fetch_graph":"https://pith.science/api/pith-number/6SYJJ5QJZ3GUSKXSPVGHXRMYAI/graph.json","fetch_events":"https://pith.science/api/pith-number/6SYJJ5QJZ3GUSKXSPVGHXRMYAI/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/6SYJJ5QJZ3GUSKXSPVGHXRMYAI/action/timestamp_anchor","attest_storage":"https://pith.science/pith/6SYJJ5QJZ3GUSKXSPVGHXRMYAI/action/storage_attestation","attest_author":"https://pith.science/pith/6SYJJ5QJZ3GUSKXSPVGHXRMYAI/action/author_attestation","sign_citation":"https://pith.science/pith/6SYJJ5QJZ3GUSKXSPVGHXRMYAI/action/citation_signature","submit_replication":"https://pith.science/pith/6SYJJ5QJZ3GUSKXSPVGHXRMYAI/action/replication_record"}},"created_at":"2026-05-18T00:23:28.219893+00:00","updated_at":"2026-05-18T00:23:28.219893+00:00"}