{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:GQRCO24GIURC76CJCMSRY6YJCZ","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"2273e6f2871dec4394daa55c478ed3962537212f8dcab429b814153afa2769d9","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-08-05T18:00:00Z","title_canon_sha256":"9b40429f4282752a4ba8426b88ad4fb8bd028c613ad1558186fea3189f6b86e4"},"schema_version":"1.0","source":{"id":"2008.02277","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2008.02277","created_at":"2026-07-05T01:25:03Z"},{"alias_kind":"arxiv_version","alias_value":"2008.02277v1","created_at":"2026-07-05T01:25:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2008.02277","created_at":"2026-07-05T01:25:03Z"},{"alias_kind":"pith_short_12","alias_value":"GQRCO24GIURC","created_at":"2026-07-05T01:25:03Z"},{"alias_kind":"pith_short_16","alias_value":"GQRCO24GIURC76CJ","created_at":"2026-07-05T01:25:03Z"},{"alias_kind":"pith_short_8","alias_value":"GQRCO24G","created_at":"2026-07-05T01:25:03Z"}],"graph_snapshots":[{"event_id":"sha256:605d92609140270318e7cb32125c281a61e64d39c5d4b6ea3bbd5526a17d543c","target":"graph","created_at":"2026-07-05T01:25:03Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2008.02277/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We investigate systematically the X-ray emission from type 1 quasars using a sample of 1825 Sloan Digital Sky Survey (SDSS) non-broad absorption line (non-BAL) quasars with Chandra archival observations. A significant correlation is found between the X-ray-to-optical power-law slope parameter ($\\alpha_{\\rm OX}$) and the 2500 $\\r{A}$ monochromatic luminosity ($L_{\\rm 2500~\\r{A}}$), and the X-ray weakness of a quasar is assessed via the deviation of its $\\alpha_{\\rm OX}$ value from that expected from this relation. We demonstrate the existence of a population of non-BAL X-ray weak quasars, and t","authors_text":"B. Luo, Hezhen Liu, Jianfeng Wu, John D. Timlin, Q. Ni, W. N. Brandt, Xingting Pu","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-08-05T18:00:00Z","title":"On the Fraction of X-ray Weak Quasars from the Sloan Digital Sky Survey"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2008.02277","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:f33637c06adb15d694071e224714ef53377d48a0bb99ad10380fdc0b6af2c3a2","target":"record","created_at":"2026-07-05T01:25:03Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"2273e6f2871dec4394daa55c478ed3962537212f8dcab429b814153afa2769d9","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-08-05T18:00:00Z","title_canon_sha256":"9b40429f4282752a4ba8426b88ad4fb8bd028c613ad1558186fea3189f6b86e4"},"schema_version":"1.0","source":{"id":"2008.02277","kind":"arxiv","version":1}},"canonical_sha256":"3422276b8645222ff84913251c7b09165dbe35a8074042ae71a02a0b7d76e7cb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3422276b8645222ff84913251c7b09165dbe35a8074042ae71a02a0b7d76e7cb","first_computed_at":"2026-07-05T01:25:03.661750Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:25:03.661750Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NN8OATrm5G5MYJwOgoowqYEnZ/THznZH+TNApuSoKk+grbkq5Fil3dSkc8VvVFZjWn94vNlMPiLW+bRGXiGfBQ==","signature_status":"signed_v1","signed_at":"2026-07-05T01:25:03.662327Z","signed_message":"canonical_sha256_bytes"},"source_id":"2008.02277","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f33637c06adb15d694071e224714ef53377d48a0bb99ad10380fdc0b6af2c3a2","sha256:605d92609140270318e7cb32125c281a61e64d39c5d4b6ea3bbd5526a17d543c"],"state_sha256":"947bdc81fca03af416ce360c86ed76c7e020acd23a05525620e1aa7e7ccd60c4"}