{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:TI24FHVNVQLFG6AFYZ5CATAHQS","short_pith_number":"pith:TI24FHVN","schema_version":"1.0","canonical_sha256":"9a35c29eadac16537805c67a204c07848c213d3d3d71632d6c45c3d739e1bdd7","source":{"kind":"arxiv","id":"1806.09056","version":1},"attestation_state":"computed","paper":{"title":"The first polluted white dwarf from Gaia DR2: the cool DAZ GaiaJ1738-0826","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"B. Klein, B. Zuckerman, Carl Melis, I. Song, P. Dufour","submitted_at":"2018-06-24T00:15:23Z","abstract_excerpt":"We present the first metal-polluted single white dwarf star identified through Gaia DR2. GaiaJ1738-0826, selected from color and absolute magnitude cuts in the Gaia DR2 data, was discovered to have strong Ca~II absorption in initial spectroscopic characterization at Lick Observatory. Notably, GaiaJ1738-0826 resembles in many ways the first confirmed metal-polluted hydrogen atmosphere white dwarf, the DAZ G74-7."},"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":"1806.09056","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-06-24T00:15:23Z","cross_cats_sorted":[],"title_canon_sha256":"8683fceaef1cff0fef334313b31c58d75e234c0ebe0fced50ac8cbfcdbdeb49b","abstract_canon_sha256":"798e7297a5148778cf9df3e765e1ca06b7168adc7d1d3de100031d52ea3ecc53"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:12:30.509413Z","signature_b64":"1IwPlhuIuqXjbY/A8s09eLyRXz8U7YemjyH8klWpIJmKh+MvaQTnmV9P5OX2pr/Zb4D9o35q2cwKzgGaoOb1DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9a35c29eadac16537805c67a204c07848c213d3d3d71632d6c45c3d739e1bdd7","last_reissued_at":"2026-05-18T00:12:30.508810Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:12:30.508810Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The first polluted white dwarf from Gaia DR2: the cool DAZ GaiaJ1738-0826","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"B. Klein, B. Zuckerman, Carl Melis, I. Song, P. Dufour","submitted_at":"2018-06-24T00:15:23Z","abstract_excerpt":"We present the first metal-polluted single white dwarf star identified through Gaia DR2. GaiaJ1738-0826, selected from color and absolute magnitude cuts in the Gaia DR2 data, was discovered to have strong Ca~II absorption in initial spectroscopic characterization at Lick Observatory. Notably, GaiaJ1738-0826 resembles in many ways the first confirmed metal-polluted hydrogen atmosphere white dwarf, the DAZ G74-7."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.09056","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":"1806.09056","created_at":"2026-05-18T00:12:30.508910+00:00"},{"alias_kind":"arxiv_version","alias_value":"1806.09056v1","created_at":"2026-05-18T00:12:30.508910+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.09056","created_at":"2026-05-18T00:12:30.508910+00:00"},{"alias_kind":"pith_short_12","alias_value":"TI24FHVNVQLF","created_at":"2026-05-18T12:32:53.628368+00:00"},{"alias_kind":"pith_short_16","alias_value":"TI24FHVNVQLFG6AF","created_at":"2026-05-18T12:32:53.628368+00:00"},{"alias_kind":"pith_short_8","alias_value":"TI24FHVN","created_at":"2026-05-18T12:32:53.628368+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/TI24FHVNVQLFG6AFYZ5CATAHQS","json":"https://pith.science/pith/TI24FHVNVQLFG6AFYZ5CATAHQS.json","graph_json":"https://pith.science/api/pith-number/TI24FHVNVQLFG6AFYZ5CATAHQS/graph.json","events_json":"https://pith.science/api/pith-number/TI24FHVNVQLFG6AFYZ5CATAHQS/events.json","paper":"https://pith.science/paper/TI24FHVN"},"agent_actions":{"view_html":"https://pith.science/pith/TI24FHVNVQLFG6AFYZ5CATAHQS","download_json":"https://pith.science/pith/TI24FHVNVQLFG6AFYZ5CATAHQS.json","view_paper":"https://pith.science/paper/TI24FHVN","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1806.09056&json=true","fetch_graph":"https://pith.science/api/pith-number/TI24FHVNVQLFG6AFYZ5CATAHQS/graph.json","fetch_events":"https://pith.science/api/pith-number/TI24FHVNVQLFG6AFYZ5CATAHQS/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/TI24FHVNVQLFG6AFYZ5CATAHQS/action/timestamp_anchor","attest_storage":"https://pith.science/pith/TI24FHVNVQLFG6AFYZ5CATAHQS/action/storage_attestation","attest_author":"https://pith.science/pith/TI24FHVNVQLFG6AFYZ5CATAHQS/action/author_attestation","sign_citation":"https://pith.science/pith/TI24FHVNVQLFG6AFYZ5CATAHQS/action/citation_signature","submit_replication":"https://pith.science/pith/TI24FHVNVQLFG6AFYZ5CATAHQS/action/replication_record"}},"created_at":"2026-05-18T00:12:30.508910+00:00","updated_at":"2026-05-18T00:12:30.508910+00:00"}