{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:I5O762M6OH3DES5SIIRWIDYTOD","short_pith_number":"pith:I5O762M6","schema_version":"1.0","canonical_sha256":"475dff699e71f6324bb24223640f1370dc74d4aaf6129bdb584398c96b4fb28d","source":{"kind":"arxiv","id":"0902.0336","version":1},"attestation_state":"computed","paper":{"title":"Deep Spectroscopy of Ultra-Strong Emission Line Galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Amy J. Barger, Esther M. Hu, Lennox L. Cowie, Yuko Kakazu","submitted_at":"2009-02-02T19:49:48Z","abstract_excerpt":"Ultra strong emission-line galaxies (USELs) with extremely high equivalent widths (EW(H beta) > 30A) can be used to pick out galaxies of extremely low metallicity in the z=0-1 redshift range. Large numbers of these objects are easily detected in deep narrow band searches and, since most have detectable [OIII] 4363, their metallicities determined using the direct method. These large samples hold the possibility for determining if there is a metallicity floor for the galaxy population. Here we describe results of an extensive spectroscopic follow-up of the Kakazu et al. (2007) catalog of 542 USE"},"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":"0902.0336","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-02-02T19:49:48Z","cross_cats_sorted":[],"title_canon_sha256":"450b7d87f4e8a646c468604d911901496bed820a2156cb9326f28874f3af0977","abstract_canon_sha256":"60ff752abf8a4b30ba6cd90808afcb6cce7049d4a86176800ab034439a2f3e0a"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:29:16.909896Z","signature_b64":"avr+Dj7GiujtTn1z+S/Qk3ANZXUz6VgG3K7W/ZvZtT5vTXKCFhwQ8d4mJzxgFBb6cuhUl7D6gSp2p+6Dwf75Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"475dff699e71f6324bb24223640f1370dc74d4aaf6129bdb584398c96b4fb28d","last_reissued_at":"2026-05-18T04:29:16.909476Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:29:16.909476Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Deep Spectroscopy of Ultra-Strong Emission Line Galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Amy J. Barger, Esther M. Hu, Lennox L. Cowie, Yuko Kakazu","submitted_at":"2009-02-02T19:49:48Z","abstract_excerpt":"Ultra strong emission-line galaxies (USELs) with extremely high equivalent widths (EW(H beta) > 30A) can be used to pick out galaxies of extremely low metallicity in the z=0-1 redshift range. Large numbers of these objects are easily detected in deep narrow band searches and, since most have detectable [OIII] 4363, their metallicities determined using the direct method. These large samples hold the possibility for determining if there is a metallicity floor for the galaxy population. Here we describe results of an extensive spectroscopic follow-up of the Kakazu et al. (2007) catalog of 542 USE"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0902.0336","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":"0902.0336","created_at":"2026-05-18T04:29:16.909531+00:00"},{"alias_kind":"arxiv_version","alias_value":"0902.0336v1","created_at":"2026-05-18T04:29:16.909531+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0902.0336","created_at":"2026-05-18T04:29:16.909531+00:00"},{"alias_kind":"pith_short_12","alias_value":"I5O762M6OH3D","created_at":"2026-05-18T12:25:59.703012+00:00"},{"alias_kind":"pith_short_16","alias_value":"I5O762M6OH3DES5S","created_at":"2026-05-18T12:25:59.703012+00:00"},{"alias_kind":"pith_short_8","alias_value":"I5O762M6","created_at":"2026-05-18T12:25:59.703012+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/I5O762M6OH3DES5SIIRWIDYTOD","json":"https://pith.science/pith/I5O762M6OH3DES5SIIRWIDYTOD.json","graph_json":"https://pith.science/api/pith-number/I5O762M6OH3DES5SIIRWIDYTOD/graph.json","events_json":"https://pith.science/api/pith-number/I5O762M6OH3DES5SIIRWIDYTOD/events.json","paper":"https://pith.science/paper/I5O762M6"},"agent_actions":{"view_html":"https://pith.science/pith/I5O762M6OH3DES5SIIRWIDYTOD","download_json":"https://pith.science/pith/I5O762M6OH3DES5SIIRWIDYTOD.json","view_paper":"https://pith.science/paper/I5O762M6","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0902.0336&json=true","fetch_graph":"https://pith.science/api/pith-number/I5O762M6OH3DES5SIIRWIDYTOD/graph.json","fetch_events":"https://pith.science/api/pith-number/I5O762M6OH3DES5SIIRWIDYTOD/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/I5O762M6OH3DES5SIIRWIDYTOD/action/timestamp_anchor","attest_storage":"https://pith.science/pith/I5O762M6OH3DES5SIIRWIDYTOD/action/storage_attestation","attest_author":"https://pith.science/pith/I5O762M6OH3DES5SIIRWIDYTOD/action/author_attestation","sign_citation":"https://pith.science/pith/I5O762M6OH3DES5SIIRWIDYTOD/action/citation_signature","submit_replication":"https://pith.science/pith/I5O762M6OH3DES5SIIRWIDYTOD/action/replication_record"}},"created_at":"2026-05-18T04:29:16.909531+00:00","updated_at":"2026-05-18T04:29:16.909531+00:00"}