{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:CXESPFX6K3T5L76GZWNVWCF6HB","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":"5ce77e8896507a7463d787d7303b5eeb47b40d9f078df4579b3fa4ec01f50c24","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-11-14T11:33:37Z","title_canon_sha256":"80c2a8fe00991713ea270f96d58c7672f39073f61f6b45c539b84ec6db91a0a7"},"schema_version":"1.0","source":{"id":"1311.3461","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1311.3461","created_at":"2026-05-18T01:46:31Z"},{"alias_kind":"arxiv_version","alias_value":"1311.3461v2","created_at":"2026-05-18T01:46:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1311.3461","created_at":"2026-05-18T01:46:31Z"},{"alias_kind":"pith_short_12","alias_value":"CXESPFX6K3T5","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_16","alias_value":"CXESPFX6K3T5L76G","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_8","alias_value":"CXESPFX6","created_at":"2026-05-18T12:27:40Z"}],"graph_snapshots":[{"event_id":"sha256:3ed137ea914e9d3e6a1275da36d93ad10e6fa4258a311f9cff942117770f026d","target":"graph","created_at":"2026-05-18T01:46:31Z","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":"I reanalyse the Riess et al. (2011, hereafter R11) Cepheid data using the revised geometric maser distance to NGC 4258 of Humphreys et al. (2013). I explore different outlier rejection criteria designed to give a reduced chi-squared of unity and compare the results with the R11 rejection algorithm, which produces a reduced chi-squared that is substantially less than unity and, in some cases, to underestimates of the errors on parameters. I show that there are sub-luminous low metallicity Cepheids in the R11 sample that skew the global fits of the period-luminosity relation. This has a small bu","authors_text":"George Efstathiou","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-11-14T11:33:37Z","title":"H0 Revisited"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1311.3461","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":"sha256:7bd9be21707b60db7bbe05a7f0cd1101f59d0bab6f35619ca1c40d42558ac04f","target":"record","created_at":"2026-05-18T01:46:31Z","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":"5ce77e8896507a7463d787d7303b5eeb47b40d9f078df4579b3fa4ec01f50c24","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-11-14T11:33:37Z","title_canon_sha256":"80c2a8fe00991713ea270f96d58c7672f39073f61f6b45c539b84ec6db91a0a7"},"schema_version":"1.0","source":{"id":"1311.3461","kind":"arxiv","version":2}},"canonical_sha256":"15c92796fe56e7d5ffc6cd9b5b08be3871ad230e7ab542b6c61d35254a3954fa","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"15c92796fe56e7d5ffc6cd9b5b08be3871ad230e7ab542b6c61d35254a3954fa","first_computed_at":"2026-05-18T01:46:31.070472Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:46:31.070472Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4gitAhqIH83/OITX0yRGH0c90MO3MS7Fgvaj0YDbKQ2MxOXETRT/sFBJr1+sqTDBO9Y5yOrQjCDJkBi8LrmOCw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:46:31.071007Z","signed_message":"canonical_sha256_bytes"},"source_id":"1311.3461","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7bd9be21707b60db7bbe05a7f0cd1101f59d0bab6f35619ca1c40d42558ac04f","sha256:3ed137ea914e9d3e6a1275da36d93ad10e6fa4258a311f9cff942117770f026d"],"state_sha256":"d806ccd3c06e1223e2d513175c3f8f8c21badbdc3c6cd622499508d828e33fd2"}