{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:IGE6VRBMYYDA4PNRFKUAUHLDFL","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":"1292a11ab2114c5f4be711c7fcf9408fe4c031086d2ad83a98ff14a5eceed0d4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-08-27T08:16:47Z","title_canon_sha256":"372de67244f347eec4069ae578042d7be9303a007482d6577e8ecf7079feb08a"},"schema_version":"1.0","source":{"id":"0908.3947","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0908.3947","created_at":"2026-05-18T02:12:22Z"},{"alias_kind":"arxiv_version","alias_value":"0908.3947v1","created_at":"2026-05-18T02:12:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0908.3947","created_at":"2026-05-18T02:12:22Z"},{"alias_kind":"pith_short_12","alias_value":"IGE6VRBMYYDA","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"IGE6VRBMYYDA4PNR","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"IGE6VRBM","created_at":"2026-05-18T12:26:00Z"}],"graph_snapshots":[{"event_id":"sha256:9d4c534069a077623d7c21ca6737011fb057aec2e2417f53b81bbc13cac07827","target":"graph","created_at":"2026-05-18T02:12:22Z","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":"Cepheids are fundamental objects astrophysically in that they hold the key to a CMB independent estimate of Hubble's constant. A number of researchers have pointed out the possibilities of breaking degeneracies between Omega_Matter and H0 if there is a CMB independent distance scale accurate to a few percent (Hu 2005). Current uncertainties in the distance scale are about 10% but future observations, with, for example, the JWST, will be capable of estimating H0 to within a few percent. A crucial step in this process is the Cepheid PL relation. Recent evidence has emerged that the PL relation, ","authors_text":"C. Bissel, C. Ngeow, I. Musella, J. Halsey, M. Marconi, M. Turner, S. Kanbur, S. Magin","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-08-27T08:16:47Z","title":"Multiphase PC/PL Relations: Comparison between Theory and observations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0908.3947","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":"sha256:8e205dfa0d3f2bd8a15259ca3292f7d955338a5ac5ba40c2370a041802145f92","target":"record","created_at":"2026-05-18T02:12:22Z","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":"1292a11ab2114c5f4be711c7fcf9408fe4c031086d2ad83a98ff14a5eceed0d4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-08-27T08:16:47Z","title_canon_sha256":"372de67244f347eec4069ae578042d7be9303a007482d6577e8ecf7079feb08a"},"schema_version":"1.0","source":{"id":"0908.3947","kind":"arxiv","version":1}},"canonical_sha256":"4189eac42cc6060e3db12aa80a1d632acfba7bb0c3a54552ab5b2e7dede28180","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4189eac42cc6060e3db12aa80a1d632acfba7bb0c3a54552ab5b2e7dede28180","first_computed_at":"2026-05-18T02:12:22.363398Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:12:22.363398Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OKdO3mgNMjh9+Ct+oWr3klnNhhT86EfNXYUFwqo9kRjoCPLo5BE1i4RKKBhi3Xn/gUdIAWokBBeThoSXr+f0CQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:12:22.364231Z","signed_message":"canonical_sha256_bytes"},"source_id":"0908.3947","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8e205dfa0d3f2bd8a15259ca3292f7d955338a5ac5ba40c2370a041802145f92","sha256:9d4c534069a077623d7c21ca6737011fb057aec2e2417f53b81bbc13cac07827"],"state_sha256":"394ffd5e3e771dd5d9012832eacd71778e5a168d472f26c4949ba6db516d366b"}