{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2015:PJ7U7G46XL3EJW7LZKLR2RC6SJ","short_pith_number":"pith:PJ7U7G46","schema_version":"1.0","canonical_sha256":"7a7f4f9b9ebaf644dbebca971d445e9255b8e3b342821073437e409acc238ac3","source":{"kind":"arxiv","id":"1509.03691","version":1},"attestation_state":"computed","paper":{"title":"Variability of QSOs with variable regions in broad absorption troughs from the Sloan Digital Sky Survey","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Institute of Theoretical Physics, Nanjing Normal University), Wei-Hao Bian, Xiao-Lei Jiang, Xue Ge (Department of Physics, Zhi-Cheng He","submitted_at":"2015-09-12T01:34:18Z","abstract_excerpt":"The variability of broad absorption lines is investigated for a sample of 188 broad-absorption-line (BAL) quasars (QSOs) ($z > 1.7$) with at least two-epoch observations from the Sloan Digital Sky Survey Data Release 7 (SDSS DR7), covering a time-scale of about 0.001 -- 3 years in the rest frame. Considering only the longest time-scale between epochs for each QSO, 73 variable regions in the \\civ BAL troughs are detected for 43 BAL QSOs. The proportion of BAL QSOs showing variable regions increases with longer time-interval than about 1 year in the rest frame. The velocity width of variable reg"},"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":"1509.03691","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-09-12T01:34:18Z","cross_cats_sorted":[],"title_canon_sha256":"290651cb249089ac01b30f26e91343bd58ea16034e6c29e32b48d3caf30ac6c3","abstract_canon_sha256":"cf74b04bb7a616ecda5e6eea8467bc3820a9cd99541a5d156277bdeb2a4b2eeb"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:28:03.051109Z","signature_b64":"aJOicgISgDI5S+JWQUljPEi9rt0YzQjy3iDlTvU9Sn2ZkMonN4jQul6FeQcDyh6PtD25s1F8wjI75XwVAcnPBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7a7f4f9b9ebaf644dbebca971d445e9255b8e3b342821073437e409acc238ac3","last_reissued_at":"2026-05-18T01:28:03.050344Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:28:03.050344Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Variability of QSOs with variable regions in broad absorption troughs from the Sloan Digital Sky Survey","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Institute of Theoretical Physics, Nanjing Normal University), Wei-Hao Bian, Xiao-Lei Jiang, Xue Ge (Department of Physics, Zhi-Cheng He","submitted_at":"2015-09-12T01:34:18Z","abstract_excerpt":"The variability of broad absorption lines is investigated for a sample of 188 broad-absorption-line (BAL) quasars (QSOs) ($z > 1.7$) with at least two-epoch observations from the Sloan Digital Sky Survey Data Release 7 (SDSS DR7), covering a time-scale of about 0.001 -- 3 years in the rest frame. Considering only the longest time-scale between epochs for each QSO, 73 variable regions in the \\civ BAL troughs are detected for 43 BAL QSOs. The proportion of BAL QSOs showing variable regions increases with longer time-interval than about 1 year in the rest frame. The velocity width of variable reg"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.03691","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":"1509.03691","created_at":"2026-05-18T01:28:03.050484+00:00"},{"alias_kind":"arxiv_version","alias_value":"1509.03691v1","created_at":"2026-05-18T01:28:03.050484+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.03691","created_at":"2026-05-18T01:28:03.050484+00:00"},{"alias_kind":"pith_short_12","alias_value":"PJ7U7G46XL3E","created_at":"2026-05-18T12:29:37.295048+00:00"},{"alias_kind":"pith_short_16","alias_value":"PJ7U7G46XL3EJW7L","created_at":"2026-05-18T12:29:37.295048+00:00"},{"alias_kind":"pith_short_8","alias_value":"PJ7U7G46","created_at":"2026-05-18T12:29:37.295048+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/PJ7U7G46XL3EJW7LZKLR2RC6SJ","json":"https://pith.science/pith/PJ7U7G46XL3EJW7LZKLR2RC6SJ.json","graph_json":"https://pith.science/api/pith-number/PJ7U7G46XL3EJW7LZKLR2RC6SJ/graph.json","events_json":"https://pith.science/api/pith-number/PJ7U7G46XL3EJW7LZKLR2RC6SJ/events.json","paper":"https://pith.science/paper/PJ7U7G46"},"agent_actions":{"view_html":"https://pith.science/pith/PJ7U7G46XL3EJW7LZKLR2RC6SJ","download_json":"https://pith.science/pith/PJ7U7G46XL3EJW7LZKLR2RC6SJ.json","view_paper":"https://pith.science/paper/PJ7U7G46","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1509.03691&json=true","fetch_graph":"https://pith.science/api/pith-number/PJ7U7G46XL3EJW7LZKLR2RC6SJ/graph.json","fetch_events":"https://pith.science/api/pith-number/PJ7U7G46XL3EJW7LZKLR2RC6SJ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/PJ7U7G46XL3EJW7LZKLR2RC6SJ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/PJ7U7G46XL3EJW7LZKLR2RC6SJ/action/storage_attestation","attest_author":"https://pith.science/pith/PJ7U7G46XL3EJW7LZKLR2RC6SJ/action/author_attestation","sign_citation":"https://pith.science/pith/PJ7U7G46XL3EJW7LZKLR2RC6SJ/action/citation_signature","submit_replication":"https://pith.science/pith/PJ7U7G46XL3EJW7LZKLR2RC6SJ/action/replication_record"}},"created_at":"2026-05-18T01:28:03.050484+00:00","updated_at":"2026-05-18T01:28:03.050484+00:00"}