{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2002:4WOBLFPKWXTBI2GINZCICG7M3R","short_pith_number":"pith:4WOBLFPK","schema_version":"1.0","canonical_sha256":"e59c1595eab5e61468c86e44811becdc5fd84ca7f57f8a814e548794ed9d9992","source":{"kind":"arxiv","id":"astro-ph/0204408","version":1},"attestation_state":"computed","paper":{"title":"Element abundances in cool white dwarfs. II. Ultraviolet observations of DZ white dwarfs","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"B. Wolff, D. Koester, J. Liebert","submitted_at":"2002-04-24T15:30:32Z","abstract_excerpt":"We present a small data base of homogeneously derived photospheric element abundances of DZ white dwarfs and related objects. Our previous investigations are supplemented with the analysis of ultraviolet spectra for nine white dwarfs. Of particular interest is the detection of Lalpha absorption in van Maanen 2 and a determination of the effective temperature of this star. The new value is about 1000K lower than previous results due to the strong ultraviolet absorption by metals which has to be considered consistently. The metal abundances of our sample stars are compatible with the predictions"},"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":"astro-ph/0204408","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2002-04-24T15:30:32Z","cross_cats_sorted":[],"title_canon_sha256":"ed8ebb76e868d06c6884e8b93a2fba596855e8e06b08260a0109e6e7ea012f44","abstract_canon_sha256":"6569ec8748597655db6998016b96da0b83a2f3879f34cf55769609749beac183"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:29:54.742045Z","signature_b64":"eBAA+9eGYeYr+AtG+bItkQVHgsMlEQXMZY/WnR7IWsnKuc/8coYyts9WQhShXcUVrXXU0lPBt28dioWwJT6bDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e59c1595eab5e61468c86e44811becdc5fd84ca7f57f8a814e548794ed9d9992","last_reissued_at":"2026-07-04T16:29:54.741589Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:29:54.741589Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Element abundances in cool white dwarfs. II. Ultraviolet observations of DZ white dwarfs","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"B. Wolff, D. Koester, J. Liebert","submitted_at":"2002-04-24T15:30:32Z","abstract_excerpt":"We present a small data base of homogeneously derived photospheric element abundances of DZ white dwarfs and related objects. Our previous investigations are supplemented with the analysis of ultraviolet spectra for nine white dwarfs. Of particular interest is the detection of Lalpha absorption in van Maanen 2 and a determination of the effective temperature of this star. The new value is about 1000K lower than previous results due to the strong ultraviolet absorption by metals which has to be considered consistently. The metal abundances of our sample stars are compatible with the predictions"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0204408","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/0204408/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"astro-ph/0204408","created_at":"2026-07-04T16:29:54.741644+00:00"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0204408v1","created_at":"2026-07-04T16:29:54.741644+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0204408","created_at":"2026-07-04T16:29:54.741644+00:00"},{"alias_kind":"pith_short_12","alias_value":"4WOBLFPKWXTB","created_at":"2026-07-04T16:29:54.741644+00:00"},{"alias_kind":"pith_short_16","alias_value":"4WOBLFPKWXTBI2GI","created_at":"2026-07-04T16:29:54.741644+00:00"},{"alias_kind":"pith_short_8","alias_value":"4WOBLFPK","created_at":"2026-07-04T16:29:54.741644+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/4WOBLFPKWXTBI2GINZCICG7M3R","json":"https://pith.science/pith/4WOBLFPKWXTBI2GINZCICG7M3R.json","graph_json":"https://pith.science/api/pith-number/4WOBLFPKWXTBI2GINZCICG7M3R/graph.json","events_json":"https://pith.science/api/pith-number/4WOBLFPKWXTBI2GINZCICG7M3R/events.json","paper":"https://pith.science/paper/4WOBLFPK"},"agent_actions":{"view_html":"https://pith.science/pith/4WOBLFPKWXTBI2GINZCICG7M3R","download_json":"https://pith.science/pith/4WOBLFPKWXTBI2GINZCICG7M3R.json","view_paper":"https://pith.science/paper/4WOBLFPK","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=astro-ph/0204408&json=true","fetch_graph":"https://pith.science/api/pith-number/4WOBLFPKWXTBI2GINZCICG7M3R/graph.json","fetch_events":"https://pith.science/api/pith-number/4WOBLFPKWXTBI2GINZCICG7M3R/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/4WOBLFPKWXTBI2GINZCICG7M3R/action/timestamp_anchor","attest_storage":"https://pith.science/pith/4WOBLFPKWXTBI2GINZCICG7M3R/action/storage_attestation","attest_author":"https://pith.science/pith/4WOBLFPKWXTBI2GINZCICG7M3R/action/author_attestation","sign_citation":"https://pith.science/pith/4WOBLFPKWXTBI2GINZCICG7M3R/action/citation_signature","submit_replication":"https://pith.science/pith/4WOBLFPKWXTBI2GINZCICG7M3R/action/replication_record"}},"created_at":"2026-07-04T16:29:54.741644+00:00","updated_at":"2026-07-04T16:29:54.741644+00:00"}