{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:YWD4RLSXD7QBWQX55DGZ6D5XPZ","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":"0efc070bada28c5b822061030fd7f5802d55cd10a295635060fc9329edce2732","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-03-25T23:10:23Z","title_canon_sha256":"aae76daa35b19c0ef148ea9099385ce415ce6aa256a2c70ad621ae00868cb312"},"schema_version":"1.0","source":{"id":"1203.5551","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.5551","created_at":"2026-05-18T01:58:01Z"},{"alias_kind":"arxiv_version","alias_value":"1203.5551v1","created_at":"2026-05-18T01:58:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.5551","created_at":"2026-05-18T01:58:01Z"},{"alias_kind":"pith_short_12","alias_value":"YWD4RLSXD7QB","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_16","alias_value":"YWD4RLSXD7QBWQX5","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_8","alias_value":"YWD4RLSX","created_at":"2026-05-18T12:27:30Z"}],"graph_snapshots":[{"event_id":"sha256:6ae2dbf566ceebba480b62139cd903b980fe8fe8a38d5283a95406c230ef3215","target":"graph","created_at":"2026-05-18T01:58:01Z","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":"The [O III] 5007 Planetary Nebula Luminosity Function (PNLF) is an excellent extragalactic standard candle. In theory, the PNLF method should not work at all, since the luminosities of the brightest planetary nebulae (PNe) should be highly sensitive to the age of their host stellar population. Yet the method appears robust, as it consistently produces < 10% distances to galaxies of all Hubble types, from the earliest ellipticals to the latest-type spirals and irregulars. It is therefore uniquely suited for cross-checking the results of other techniques and finding small offsets between the Pop","authors_text":"Robin Ciardullo","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-03-25T23:10:23Z","title":"The Planetary Nebula Luminosity Function at the Dawn of Gaia"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.5551","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":"sha256:6fb0f563dc3b15f6bd9d47138912acc07112b95eaba7bdd151f24453f9d0f271","target":"record","created_at":"2026-05-18T01:58:01Z","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":"0efc070bada28c5b822061030fd7f5802d55cd10a295635060fc9329edce2732","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-03-25T23:10:23Z","title_canon_sha256":"aae76daa35b19c0ef148ea9099385ce415ce6aa256a2c70ad621ae00868cb312"},"schema_version":"1.0","source":{"id":"1203.5551","kind":"arxiv","version":1}},"canonical_sha256":"c587c8ae571fe01b42fde8cd9f0fb77e60e68921f9606c28b164b8c0bd6fd96d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c587c8ae571fe01b42fde8cd9f0fb77e60e68921f9606c28b164b8c0bd6fd96d","first_computed_at":"2026-05-18T01:58:01.991980Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:58:01.991980Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xVupRy24q82EV/t4VsDMYLWRlvI7jKdLsDfIcoq5jRt/6xgC5uIvKE3HKUBoeSmVDEG310d40Eso0xe/PqQWAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:58:01.992557Z","signed_message":"canonical_sha256_bytes"},"source_id":"1203.5551","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6fb0f563dc3b15f6bd9d47138912acc07112b95eaba7bdd151f24453f9d0f271","sha256:6ae2dbf566ceebba480b62139cd903b980fe8fe8a38d5283a95406c230ef3215"],"state_sha256":"3b9bacf3de99e108127c9472541a34492d13be539cf225ae70abd2da88c46b5f"}