{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2020:2PZWSLN6K3WVUJHCBO6SYTNCS3","short_pith_number":"pith:2PZWSLN6","schema_version":"1.0","canonical_sha256":"d3f3692dbe56ed5a24e20bbd2c4da296de3f9dfce36ce577b6b33857bd28a53c","source":{"kind":"arxiv","id":"2008.02392","version":1},"attestation_state":"computed","paper":{"title":"The Discovery of lambda Bootis Stars -- The Southern Survey II","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Charles Kuehn, Christopher J. Corbally, Josiah Killam, Richard O. Gray, Simon J. Murphy, Timothy R. Bedding","submitted_at":"2020-08-05T23:38:40Z","abstract_excerpt":"The $\\lambda$ Boo stars are chemically peculiar A-type stars whose abundance anomalies are associated with the accretion of metal-poor material. We searched for $\\lambda$ Boo stars in the southern hemisphere in a targeted spectroscopic survey of metal-weak and emission-line stars. Obtaining spectra for 308 stars and classifying them on the MK system, we found or co-discovered 24 new $\\lambda$ Boo stars. We also revised the classifications of 11 known $\\lambda$ Boo stars, one of which turned out to be a chemically normal rapid rotator. We show that stars previously classified in the literature "},"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":"2008.02392","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-08-05T23:38:40Z","cross_cats_sorted":[],"title_canon_sha256":"2421c705b8fcd1705c531235ac3318e4c3845ec8dd1567c1cacea3e16c346fd0","abstract_canon_sha256":"80862d1e4180c7bfce8030856016da4012f256b0633d3977c7d8b658087e9882"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:28:15.869975Z","signature_b64":"WFkwX4lBdR74VRamIULU9A0bHUqrwNZw3UAAAUzIsabTBU2mNKKP3fWa9dustctxWtd+TP8dBU3OmEgE0twKBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d3f3692dbe56ed5a24e20bbd2c4da296de3f9dfce36ce577b6b33857bd28a53c","last_reissued_at":"2026-07-05T01:28:15.869496Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:28:15.869496Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The Discovery of lambda Bootis Stars -- The Southern Survey II","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Charles Kuehn, Christopher J. Corbally, Josiah Killam, Richard O. Gray, Simon J. Murphy, Timothy R. Bedding","submitted_at":"2020-08-05T23:38:40Z","abstract_excerpt":"The $\\lambda$ Boo stars are chemically peculiar A-type stars whose abundance anomalies are associated with the accretion of metal-poor material. We searched for $\\lambda$ Boo stars in the southern hemisphere in a targeted spectroscopic survey of metal-weak and emission-line stars. Obtaining spectra for 308 stars and classifying them on the MK system, we found or co-discovered 24 new $\\lambda$ Boo stars. We also revised the classifications of 11 known $\\lambda$ Boo stars, one of which turned out to be a chemically normal rapid rotator. We show that stars previously classified in the literature "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2008.02392","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/2008.02392/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":"2008.02392","created_at":"2026-07-05T01:28:15.869560+00:00"},{"alias_kind":"arxiv_version","alias_value":"2008.02392v1","created_at":"2026-07-05T01:28:15.869560+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2008.02392","created_at":"2026-07-05T01:28:15.869560+00:00"},{"alias_kind":"pith_short_12","alias_value":"2PZWSLN6K3WV","created_at":"2026-07-05T01:28:15.869560+00:00"},{"alias_kind":"pith_short_16","alias_value":"2PZWSLN6K3WVUJHC","created_at":"2026-07-05T01:28:15.869560+00:00"},{"alias_kind":"pith_short_8","alias_value":"2PZWSLN6","created_at":"2026-07-05T01:28:15.869560+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/2PZWSLN6K3WVUJHCBO6SYTNCS3","json":"https://pith.science/pith/2PZWSLN6K3WVUJHCBO6SYTNCS3.json","graph_json":"https://pith.science/api/pith-number/2PZWSLN6K3WVUJHCBO6SYTNCS3/graph.json","events_json":"https://pith.science/api/pith-number/2PZWSLN6K3WVUJHCBO6SYTNCS3/events.json","paper":"https://pith.science/paper/2PZWSLN6"},"agent_actions":{"view_html":"https://pith.science/pith/2PZWSLN6K3WVUJHCBO6SYTNCS3","download_json":"https://pith.science/pith/2PZWSLN6K3WVUJHCBO6SYTNCS3.json","view_paper":"https://pith.science/paper/2PZWSLN6","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2008.02392&json=true","fetch_graph":"https://pith.science/api/pith-number/2PZWSLN6K3WVUJHCBO6SYTNCS3/graph.json","fetch_events":"https://pith.science/api/pith-number/2PZWSLN6K3WVUJHCBO6SYTNCS3/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/2PZWSLN6K3WVUJHCBO6SYTNCS3/action/timestamp_anchor","attest_storage":"https://pith.science/pith/2PZWSLN6K3WVUJHCBO6SYTNCS3/action/storage_attestation","attest_author":"https://pith.science/pith/2PZWSLN6K3WVUJHCBO6SYTNCS3/action/author_attestation","sign_citation":"https://pith.science/pith/2PZWSLN6K3WVUJHCBO6SYTNCS3/action/citation_signature","submit_replication":"https://pith.science/pith/2PZWSLN6K3WVUJHCBO6SYTNCS3/action/replication_record"}},"created_at":"2026-07-05T01:28:15.869560+00:00","updated_at":"2026-07-05T01:28:15.869560+00:00"}