{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:56E3GSFEK6HQZ7YCQVS53QRAQD","short_pith_number":"pith:56E3GSFE","schema_version":"1.0","canonical_sha256":"ef89b348a4578f0cff028565ddc22080e6d0d95d4d3de9b8ff38fc173bcbb519","source":{"kind":"arxiv","id":"0909.4356","version":1},"attestation_state":"computed","paper":{"title":"The Planetary Nebula Luminosity Function: Pieces of the Puzzle","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.CO","authors_text":"Robin Ciardullo","submitted_at":"2009-09-24T18:31:04Z","abstract_excerpt":"Extragalactic surveys in the emission line of [O III] 5007 have provided us with the absolute line strengths of large, homogeneous sets of planetary nebulae. These data have been used to address a host of problems, from the measurement of the extragalactic distance scale, to the study of stellar populations. I review our current understanding of the [O III] planetary nebula luminosity function (PNLF), and discuss some of the physical processes that effect its structure. I also describe the features of the H-alpha PNLF, a function that, upon first glance, looks similar to the [O III] PNLF, but "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"0909.4356","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-09-24T18:31:04Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"eca603eb44496354b0bd480ff5dbd6b626838bd0eb959a771db2928751a31aa6","abstract_canon_sha256":"5c8194d8822ed3dd068f1b2d465703a8b9af780aa7bf51c9fed282c7b095d9a8"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:32:34.824441Z","signature_b64":"9wgAUHrNXzyq28g0Yw+rXeGSvnz55nu2aUELENIg2vP7ft21Im3mPV+djgkY2HAKrjG84lTIxSG89KKBN4G+Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ef89b348a4578f0cff028565ddc22080e6d0d95d4d3de9b8ff38fc173bcbb519","last_reissued_at":"2026-05-18T04:32:34.823800Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:32:34.823800Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The Planetary Nebula Luminosity Function: Pieces of the Puzzle","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.CO","authors_text":"Robin Ciardullo","submitted_at":"2009-09-24T18:31:04Z","abstract_excerpt":"Extragalactic surveys in the emission line of [O III] 5007 have provided us with the absolute line strengths of large, homogeneous sets of planetary nebulae. These data have been used to address a host of problems, from the measurement of the extragalactic distance scale, to the study of stellar populations. I review our current understanding of the [O III] planetary nebula luminosity function (PNLF), and discuss some of the physical processes that effect its structure. I also describe the features of the H-alpha PNLF, a function that, upon first glance, looks similar to the [O III] PNLF, but "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.4356","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"0909.4356","created_at":"2026-05-18T04:32:34.823897+00:00"},{"alias_kind":"arxiv_version","alias_value":"0909.4356v1","created_at":"2026-05-18T04:32:34.823897+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.4356","created_at":"2026-05-18T04:32:34.823897+00:00"},{"alias_kind":"pith_short_12","alias_value":"56E3GSFEK6HQ","created_at":"2026-05-18T12:25:58.837520+00:00"},{"alias_kind":"pith_short_16","alias_value":"56E3GSFEK6HQZ7YC","created_at":"2026-05-18T12:25:58.837520+00:00"},{"alias_kind":"pith_short_8","alias_value":"56E3GSFE","created_at":"2026-05-18T12:25:58.837520+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/56E3GSFEK6HQZ7YCQVS53QRAQD","json":"https://pith.science/pith/56E3GSFEK6HQZ7YCQVS53QRAQD.json","graph_json":"https://pith.science/api/pith-number/56E3GSFEK6HQZ7YCQVS53QRAQD/graph.json","events_json":"https://pith.science/api/pith-number/56E3GSFEK6HQZ7YCQVS53QRAQD/events.json","paper":"https://pith.science/paper/56E3GSFE"},"agent_actions":{"view_html":"https://pith.science/pith/56E3GSFEK6HQZ7YCQVS53QRAQD","download_json":"https://pith.science/pith/56E3GSFEK6HQZ7YCQVS53QRAQD.json","view_paper":"https://pith.science/paper/56E3GSFE","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0909.4356&json=true","fetch_graph":"https://pith.science/api/pith-number/56E3GSFEK6HQZ7YCQVS53QRAQD/graph.json","fetch_events":"https://pith.science/api/pith-number/56E3GSFEK6HQZ7YCQVS53QRAQD/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/56E3GSFEK6HQZ7YCQVS53QRAQD/action/timestamp_anchor","attest_storage":"https://pith.science/pith/56E3GSFEK6HQZ7YCQVS53QRAQD/action/storage_attestation","attest_author":"https://pith.science/pith/56E3GSFEK6HQZ7YCQVS53QRAQD/action/author_attestation","sign_citation":"https://pith.science/pith/56E3GSFEK6HQZ7YCQVS53QRAQD/action/citation_signature","submit_replication":"https://pith.science/pith/56E3GSFEK6HQZ7YCQVS53QRAQD/action/replication_record"}},"created_at":"2026-05-18T04:32:34.823897+00:00","updated_at":"2026-05-18T04:32:34.823897+00:00"}