{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:HFVHJELL4QLESQ3BPU66WJA53N","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":"b56c92d30d72540c0ff525a7a79c5c7bb96e7d513fe7a0133d84426e468ee51c","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-06-03T20:00:02Z","title_canon_sha256":"4ec56f22a99b1c24d7cbaff9c23cbed95dd4bdd83444d113545a1d3fd33c89a5"},"schema_version":"1.0","source":{"id":"1306.0569","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1306.0569","created_at":"2026-05-18T01:49:33Z"},{"alias_kind":"arxiv_version","alias_value":"1306.0569v2","created_at":"2026-05-18T01:49:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.0569","created_at":"2026-05-18T01:49:33Z"},{"alias_kind":"pith_short_12","alias_value":"HFVHJELL4QLE","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_16","alias_value":"HFVHJELL4QLESQ3B","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_8","alias_value":"HFVHJELL","created_at":"2026-05-18T12:27:46Z"}],"graph_snapshots":[{"event_id":"sha256:526371d4f129aeaeb1d808d3333cc37c8c4c2e02012ef64a4c893b300ed3e1dc","target":"graph","created_at":"2026-05-18T01:49:33Z","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":"Using stellar structure calculations in the Hartle-Thorne approximation, we derive analytic expressions connecting the ellipticity of the stellar surface to the compactness, the spin angular momentum, and the quadrupole moment of the spacetime. We also obtain empirical relations between the compactness, the spin angular momentum, and the spacetime quadrupole. Our formulae reproduce the results of numerical calculations to within a few percent and help reduce the number of parameters necessary to model the observational appearance of moderately spinning neutron stars. This is sufficient for com","authors_text":"Dimitrios Psaltis, Emanuele Berti, Feryal Ozel, Michi Baubock","cross_cats":["gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-06-03T20:00:02Z","title":"Relations Between Neutron-Star Parameters in the Hartle-Thorne Approximation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.0569","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":"sha256:633f245e5ad00b5dd2753137ec951e7eb300b1bdf6ed66588a8841d524c8ce72","target":"record","created_at":"2026-05-18T01:49:33Z","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":"b56c92d30d72540c0ff525a7a79c5c7bb96e7d513fe7a0133d84426e468ee51c","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-06-03T20:00:02Z","title_canon_sha256":"4ec56f22a99b1c24d7cbaff9c23cbed95dd4bdd83444d113545a1d3fd33c89a5"},"schema_version":"1.0","source":{"id":"1306.0569","kind":"arxiv","version":2}},"canonical_sha256":"396a74916be4164943617d3deb241ddb4dbeda642ce9d8019b8363a8ac9c86d9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"396a74916be4164943617d3deb241ddb4dbeda642ce9d8019b8363a8ac9c86d9","first_computed_at":"2026-05-18T01:49:33.456675Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:49:33.456675Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yA4sfm4lxg78PdXofWFSmKBMQLv5sfUjHNDJRr0bjO1UGEMgsQePBOY/itSzoh039WE8KLBXF+Dr9ymKnufSCw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:49:33.457077Z","signed_message":"canonical_sha256_bytes"},"source_id":"1306.0569","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:633f245e5ad00b5dd2753137ec951e7eb300b1bdf6ed66588a8841d524c8ce72","sha256:526371d4f129aeaeb1d808d3333cc37c8c4c2e02012ef64a4c893b300ed3e1dc"],"state_sha256":"d80597518995c8340907340f04eb9836e566b0a0752700feb966f67c8c622824"}