{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:JB7P5CGAYRQHNDBAW6T7VWSSCP","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":"54f87a4dd238293faa383ecfae4b302d1af26e64acbf3ce151e611723e3d569b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-10-15T12:43:47Z","title_canon_sha256":"eff302c958f83a153702f9f6b9dbbce0b5e2b2c108afd9df6cbbd09c5ba06d9e"},"schema_version":"1.0","source":{"id":"1310.4037","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1310.4037","created_at":"2026-05-18T03:10:25Z"},{"alias_kind":"arxiv_version","alias_value":"1310.4037v1","created_at":"2026-05-18T03:10:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1310.4037","created_at":"2026-05-18T03:10:25Z"},{"alias_kind":"pith_short_12","alias_value":"JB7P5CGAYRQH","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_16","alias_value":"JB7P5CGAYRQHNDBA","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_8","alias_value":"JB7P5CGA","created_at":"2026-05-18T12:27:49Z"}],"graph_snapshots":[{"event_id":"sha256:f42f6d1cf516d84de32eb6db1c68f08c82b7da1b603698fdcc656d5eb05cd91f","target":"graph","created_at":"2026-05-18T03:10:25Z","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"},"paper":{"abstract_excerpt":"We test the relativistic precession model (RPM) and the MHD Alfven wave oscillation model (AWOM) for the kHz QPOs by the sources with measured NS masses and twin kHz QPO frequencies. For RPM, the derived NS mass of Cyg X-2 (SAX J1808.4-3658 and 4U 1820-30) is 1.96 +/- 0.10 solar masses (2.83 +/- 0.04 solar masses and 1.85 +/- 0.02 solar masses), which is 30% (100% and 40%) higher than the measured result 1.5 +/- 0.3 solar masses (< 1.4 solar masses and 1.29 + 0.19 / - 0.07 solar masses). For AWOM, where the free parameter of model is the density of star, we infer the NS radii to be around 10 -","authors_text":"C.M. Zhang, D.H. Wang, J.L. Qu, L. Chen, Y.J. Lei","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-10-15T12:43:47Z","title":"Constraints on kHz QPO models and stellar EOSs from SAX J1808.4-3658, Cyg X-2 and 4U 1820-30"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1310.4037","kind":"arxiv","version":1},"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":"sha256:1f29ecec23cfe06f03a57702b8fdc9745ad2997dbfbd0b65af401aae20b6ef1c","target":"record","created_at":"2026-05-18T03:10:25Z","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":"54f87a4dd238293faa383ecfae4b302d1af26e64acbf3ce151e611723e3d569b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-10-15T12:43:47Z","title_canon_sha256":"eff302c958f83a153702f9f6b9dbbce0b5e2b2c108afd9df6cbbd09c5ba06d9e"},"schema_version":"1.0","source":{"id":"1310.4037","kind":"arxiv","version":1}},"canonical_sha256":"487efe88c0c460768c20b7a7fada5213eb3172d30194a00344695991760db0bd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"487efe88c0c460768c20b7a7fada5213eb3172d30194a00344695991760db0bd","first_computed_at":"2026-05-18T03:10:25.305791Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:10:25.305791Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"j8j8rC8IXGar0oYp93qwtGA/u1vMSw0VhTxJ8QAwX4p/ct4W092pTTUCGH4qUIelPJNAC4o8LxI9zP2vipWkCw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:10:25.306576Z","signed_message":"canonical_sha256_bytes"},"source_id":"1310.4037","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1f29ecec23cfe06f03a57702b8fdc9745ad2997dbfbd0b65af401aae20b6ef1c","sha256:f42f6d1cf516d84de32eb6db1c68f08c82b7da1b603698fdcc656d5eb05cd91f"],"state_sha256":"5ae9949a2a99dc26d1fcdc0dd69c77b9b2fe839f7e2d7f4945d2df9e5459655c"}