{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2016:FNMF67Q76CILNI7PCTKY66LCPM","short_pith_number":"pith:FNMF67Q7","schema_version":"1.0","canonical_sha256":"2b585f7e1ff090b6a3ef14d58f79627b0cd31eb025f918e9faca7fa9022d3921","source":{"kind":"arxiv","id":"1604.05858","version":3},"attestation_state":"computed","paper":{"title":"Revisiting Stochastic Variability of AGNs with Structure Functions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Szymon Koz{\\l}owski","submitted_at":"2016-04-20T08:49:10Z","abstract_excerpt":"Discrepancies between reported structure function (SF) slopes and their overall flatness as compared to expectations from the damped random walk (DRW) model, which generally well describes the variability of active galactic nuclei (AGNs), have triggered us to study this problem in detail. We review common AGN variability observables and identify their most common problems. Equipped with this knowledge, we study ~9000 r-band AGN light curves from Stripe 82 of the Sloan Digital Sky Survey, using SFs described by stochastic processes with the power exponential covariance matrix of the signal. We "},"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":"1604.05858","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-04-20T08:49:10Z","cross_cats_sorted":[],"title_canon_sha256":"a2263450417746ce84bab8830853e58bdeaea94e39e05391ba0929c0eb5c4cbb","abstract_canon_sha256":"1c303e94d21912728671d7720e062ec097fa1fedf6a6a22c1e0adf22c8def561"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:49:36.746761Z","signature_b64":"KzKzFWBpeEAv4GPyG8DzWJ4zo0gtIjfDVgyJkjLeSbSaSU/kGdM4sZ7ExP7smM9AhshaPf3jZjXlYNgQMYx2Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2b585f7e1ff090b6a3ef14d58f79627b0cd31eb025f918e9faca7fa9022d3921","last_reissued_at":"2026-05-18T00:49:36.746176Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:49:36.746176Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Revisiting Stochastic Variability of AGNs with Structure Functions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Szymon Koz{\\l}owski","submitted_at":"2016-04-20T08:49:10Z","abstract_excerpt":"Discrepancies between reported structure function (SF) slopes and their overall flatness as compared to expectations from the damped random walk (DRW) model, which generally well describes the variability of active galactic nuclei (AGNs), have triggered us to study this problem in detail. We review common AGN variability observables and identify their most common problems. Equipped with this knowledge, we study ~9000 r-band AGN light curves from Stripe 82 of the Sloan Digital Sky Survey, using SFs described by stochastic processes with the power exponential covariance matrix of the signal. We "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.05858","kind":"arxiv","version":3},"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":"1604.05858","created_at":"2026-05-18T00:49:36.746260+00:00"},{"alias_kind":"arxiv_version","alias_value":"1604.05858v3","created_at":"2026-05-18T00:49:36.746260+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.05858","created_at":"2026-05-18T00:49:36.746260+00:00"},{"alias_kind":"pith_short_12","alias_value":"FNMF67Q76CIL","created_at":"2026-05-18T12:30:15.759754+00:00"},{"alias_kind":"pith_short_16","alias_value":"FNMF67Q76CILNI7P","created_at":"2026-05-18T12:30:15.759754+00:00"},{"alias_kind":"pith_short_8","alias_value":"FNMF67Q7","created_at":"2026-05-18T12:30:15.759754+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/FNMF67Q76CILNI7PCTKY66LCPM","json":"https://pith.science/pith/FNMF67Q76CILNI7PCTKY66LCPM.json","graph_json":"https://pith.science/api/pith-number/FNMF67Q76CILNI7PCTKY66LCPM/graph.json","events_json":"https://pith.science/api/pith-number/FNMF67Q76CILNI7PCTKY66LCPM/events.json","paper":"https://pith.science/paper/FNMF67Q7"},"agent_actions":{"view_html":"https://pith.science/pith/FNMF67Q76CILNI7PCTKY66LCPM","download_json":"https://pith.science/pith/FNMF67Q76CILNI7PCTKY66LCPM.json","view_paper":"https://pith.science/paper/FNMF67Q7","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1604.05858&json=true","fetch_graph":"https://pith.science/api/pith-number/FNMF67Q76CILNI7PCTKY66LCPM/graph.json","fetch_events":"https://pith.science/api/pith-number/FNMF67Q76CILNI7PCTKY66LCPM/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/FNMF67Q76CILNI7PCTKY66LCPM/action/timestamp_anchor","attest_storage":"https://pith.science/pith/FNMF67Q76CILNI7PCTKY66LCPM/action/storage_attestation","attest_author":"https://pith.science/pith/FNMF67Q76CILNI7PCTKY66LCPM/action/author_attestation","sign_citation":"https://pith.science/pith/FNMF67Q76CILNI7PCTKY66LCPM/action/citation_signature","submit_replication":"https://pith.science/pith/FNMF67Q76CILNI7PCTKY66LCPM/action/replication_record"}},"created_at":"2026-05-18T00:49:36.746260+00:00","updated_at":"2026-05-18T00:49:36.746260+00:00"}