{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:RREW47HZFNDCXETIZVPAVY5GPE","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":"1a697e9b6a952f75541270436110f914256f0d7b147d96e672ee97bf6dfdc5c1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-10-30T03:02:26Z","title_canon_sha256":"2ca6819382c51ee566bb31b8d6df333fcf57766d3aa8ed89ced36a1d6c1828d1"},"schema_version":"1.0","source":{"id":"0910.5775","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0910.5775","created_at":"2026-05-18T02:11:01Z"},{"alias_kind":"arxiv_version","alias_value":"0910.5775v1","created_at":"2026-05-18T02:11:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0910.5775","created_at":"2026-05-18T02:11:01Z"},{"alias_kind":"pith_short_12","alias_value":"RREW47HZFNDC","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_16","alias_value":"RREW47HZFNDCXETI","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_8","alias_value":"RREW47HZ","created_at":"2026-05-18T12:26:01Z"}],"graph_snapshots":[{"event_id":"sha256:2315e106266c7307d0871b59ec3326fd5df4b79f52a1c6ea2f6cc8d2657be955","target":"graph","created_at":"2026-05-18T02:11:01Z","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":"Ten years ago our team completed the Hubble Space Telescope Key Project on the extragalactic distance scale. Cepheids were detected in some 25 galaxies and used to calibrate four secondary distance indicators that reach out into the expansion field beyond the noise of galaxy peculiar velocities. The result was H_0 = 72 +/- 8 km/sec/Mpc and put an end to galaxy distances uncertain by a factor of two. This work has been awarded the Gruber Prize in Cosmology for 2009.","authors_text":"J. Mould, R. Kennicutt, W. Freedman","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-10-30T03:02:26Z","title":"Measuring the Hubble Constant with the Hubble Space Telescope"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0910.5775","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":"sha256:6f1b741d2065e1015c292b7adc4dcad532ded9dbfb84b3705306cf01e0a0e7ac","target":"record","created_at":"2026-05-18T02:11:01Z","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":"1a697e9b6a952f75541270436110f914256f0d7b147d96e672ee97bf6dfdc5c1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-10-30T03:02:26Z","title_canon_sha256":"2ca6819382c51ee566bb31b8d6df333fcf57766d3aa8ed89ced36a1d6c1828d1"},"schema_version":"1.0","source":{"id":"0910.5775","kind":"arxiv","version":1}},"canonical_sha256":"8c496e7cf92b462b9268cd5e0ae3a67911b36ee84fee852c6b0d4658c34a0783","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8c496e7cf92b462b9268cd5e0ae3a67911b36ee84fee852c6b0d4658c34a0783","first_computed_at":"2026-05-18T02:11:01.533416Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:11:01.533416Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"h43gx3KMtHL5mjU8XpQFXHxMUebhozb29LFZtTrIfaNXyyo1P0JCkC+th/hmutBnAu0MJlJDp3By46uTbt6BCw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:11:01.534179Z","signed_message":"canonical_sha256_bytes"},"source_id":"0910.5775","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6f1b741d2065e1015c292b7adc4dcad532ded9dbfb84b3705306cf01e0a0e7ac","sha256:2315e106266c7307d0871b59ec3326fd5df4b79f52a1c6ea2f6cc8d2657be955"],"state_sha256":"e78f904c615bfdcabd8b935a327978bb6e53d37c90f6576e2920ed0303164966"}