{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2017:CSB6HRJXLRLMALVA2BISY7AXPT","short_pith_number":"pith:CSB6HRJX","schema_version":"1.0","canonical_sha256":"1483e3c5375c56c02ea0d0512c7c177cce58c39bcdae2f0a1edcb19889606315","source":{"kind":"arxiv","id":"1801.00330","version":1},"attestation_state":"computed","paper":{"title":"What drives the Quasar Main Sequence?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.HE","authors_text":"Bo\\.zena Czerny, Conor Wildy, Marzena \\'Sniegowska, Swayamtrupta Panda","submitted_at":"2017-12-31T18:11:36Z","abstract_excerpt":"Eigenvector 1 (EV1) was found to be the dominant component behind the significant correlations for the measured parameters in quasar spectra (Boroson & Green, 1992). The parameter R$_{\\mathrm{FeII}}$, which strongly correlates to the EV1, is the ${\\mathrm{FeII}}$ strength, defined to be the ratio of the equivalent width of ${\\mathrm{FeII}}$ to the equivalent width of ${\\mathrm{H\\beta}}$. This allows to construct a quasar main sequence analogous to the stellar properties driven HR diagram (Sulentic et al. 2001). We try to find the main driver behind the EV1 among the basic (theoretically motiva"},"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":"1801.00330","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-12-31T18:11:36Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"be7e911f75a787bee9e063253bee351c52a4f8af65f1d9cea534716c98fe9ca2","abstract_canon_sha256":"3048c29ab3cd8bafd917d203bd91e3bf48751be8009f668b23816b3e2e5de4fc"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:26:58.672262Z","signature_b64":"xqIrnqjXn0g/ZekQCsFUybeudFkpRyG803E5UGtenz2CGn4DfFnRNoVPiEjBWRc4ti1b8RqAtI53XksRTY+8Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1483e3c5375c56c02ea0d0512c7c177cce58c39bcdae2f0a1edcb19889606315","last_reissued_at":"2026-05-18T00:26:58.671594Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:26:58.671594Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"What drives the Quasar Main Sequence?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.HE","authors_text":"Bo\\.zena Czerny, Conor Wildy, Marzena \\'Sniegowska, Swayamtrupta Panda","submitted_at":"2017-12-31T18:11:36Z","abstract_excerpt":"Eigenvector 1 (EV1) was found to be the dominant component behind the significant correlations for the measured parameters in quasar spectra (Boroson & Green, 1992). The parameter R$_{\\mathrm{FeII}}$, which strongly correlates to the EV1, is the ${\\mathrm{FeII}}$ strength, defined to be the ratio of the equivalent width of ${\\mathrm{FeII}}$ to the equivalent width of ${\\mathrm{H\\beta}}$. This allows to construct a quasar main sequence analogous to the stellar properties driven HR diagram (Sulentic et al. 2001). We try to find the main driver behind the EV1 among the basic (theoretically motiva"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.00330","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":"1801.00330","created_at":"2026-05-18T00:26:58.671688+00:00"},{"alias_kind":"arxiv_version","alias_value":"1801.00330v1","created_at":"2026-05-18T00:26:58.671688+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.00330","created_at":"2026-05-18T00:26:58.671688+00:00"},{"alias_kind":"pith_short_12","alias_value":"CSB6HRJXLRLM","created_at":"2026-05-18T12:31:10.602751+00:00"},{"alias_kind":"pith_short_16","alias_value":"CSB6HRJXLRLMALVA","created_at":"2026-05-18T12:31:10.602751+00:00"},{"alias_kind":"pith_short_8","alias_value":"CSB6HRJX","created_at":"2026-05-18T12:31:10.602751+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/CSB6HRJXLRLMALVA2BISY7AXPT","json":"https://pith.science/pith/CSB6HRJXLRLMALVA2BISY7AXPT.json","graph_json":"https://pith.science/api/pith-number/CSB6HRJXLRLMALVA2BISY7AXPT/graph.json","events_json":"https://pith.science/api/pith-number/CSB6HRJXLRLMALVA2BISY7AXPT/events.json","paper":"https://pith.science/paper/CSB6HRJX"},"agent_actions":{"view_html":"https://pith.science/pith/CSB6HRJXLRLMALVA2BISY7AXPT","download_json":"https://pith.science/pith/CSB6HRJXLRLMALVA2BISY7AXPT.json","view_paper":"https://pith.science/paper/CSB6HRJX","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1801.00330&json=true","fetch_graph":"https://pith.science/api/pith-number/CSB6HRJXLRLMALVA2BISY7AXPT/graph.json","fetch_events":"https://pith.science/api/pith-number/CSB6HRJXLRLMALVA2BISY7AXPT/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/CSB6HRJXLRLMALVA2BISY7AXPT/action/timestamp_anchor","attest_storage":"https://pith.science/pith/CSB6HRJXLRLMALVA2BISY7AXPT/action/storage_attestation","attest_author":"https://pith.science/pith/CSB6HRJXLRLMALVA2BISY7AXPT/action/author_attestation","sign_citation":"https://pith.science/pith/CSB6HRJXLRLMALVA2BISY7AXPT/action/citation_signature","submit_replication":"https://pith.science/pith/CSB6HRJXLRLMALVA2BISY7AXPT/action/replication_record"}},"created_at":"2026-05-18T00:26:58.671688+00:00","updated_at":"2026-05-18T00:26:58.671688+00:00"}