{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:3CXQTVSMMYXDHOEI36QKJPIY3A","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":"467ab797eb88f546f7dafdc2f90908caca128d0f6f2c4a55e134bdecad6f4722","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-03-22T20:00:04Z","title_canon_sha256":"037937bf7051938f156048c745f2c5c85b141212a7642de8969f45d19e92d115"},"schema_version":"1.0","source":{"id":"1603.06948","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1603.06948","created_at":"2026-05-18T00:59:25Z"},{"alias_kind":"arxiv_version","alias_value":"1603.06948v2","created_at":"2026-05-18T00:59:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1603.06948","created_at":"2026-05-18T00:59:25Z"},{"alias_kind":"pith_short_12","alias_value":"3CXQTVSMMYXD","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_16","alias_value":"3CXQTVSMMYXDHOEI","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_8","alias_value":"3CXQTVSM","created_at":"2026-05-18T12:29:55Z"}],"graph_snapshots":[{"event_id":"sha256:c933e206cc2ef1e8dd13a1bb3a52a3e193054294b5b2dae5cacf0720372aa0b5","target":"graph","created_at":"2026-05-18T00:59:25Z","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"},"paper":{"abstract_excerpt":"The typical optical-UV continuum slopes observed in many type 1 AGN are redder than expected from thin accretion disk models. A possible resolution to this conundrum is that many AGN are reddened by dust along the line of sight. To explore this possibility, we stack 5000 SDSS AGN with luminosity L~10^45erg/s and redshift z~0.4 in bins of optical continuum slope alpha_opt and width of the broad H$\\beta$ emission line. We measure the EW of the NaID absorption feature in each stacked spectrum. We find a linear relation between alpha_opt and EW(NaID), such that EW(NaID) increases as alpha_opt beco","authors_text":"Dalya Baron, Dovi Poznanski, Hagai Netzer, Jonathan Stern","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-03-22T20:00:04Z","title":"Evidence that most type 1 AGN are reddened by dust in the host ISM"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.06948","kind":"arxiv","version":2},"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":"sha256:1d99c48297fe3d30b7cfab69dfd7186506476b402c50278d489b394d2c786be2","target":"record","created_at":"2026-05-18T00:59:25Z","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":"467ab797eb88f546f7dafdc2f90908caca128d0f6f2c4a55e134bdecad6f4722","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-03-22T20:00:04Z","title_canon_sha256":"037937bf7051938f156048c745f2c5c85b141212a7642de8969f45d19e92d115"},"schema_version":"1.0","source":{"id":"1603.06948","kind":"arxiv","version":2}},"canonical_sha256":"d8af09d64c662e33b888dfa0a4bd18d82b6a41216a6eb8033baf4303de6d4346","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d8af09d64c662e33b888dfa0a4bd18d82b6a41216a6eb8033baf4303de6d4346","first_computed_at":"2026-05-18T00:59:25.670157Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:59:25.670157Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yU9eM0FFHclRbX2KhSXjLMemqssdDghncvciFBZ8KgPR4vbmoJbusmkKjbpNjKUMpuz4AAsOhZjITTP6h3rKAg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:59:25.670829Z","signed_message":"canonical_sha256_bytes"},"source_id":"1603.06948","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1d99c48297fe3d30b7cfab69dfd7186506476b402c50278d489b394d2c786be2","sha256:c933e206cc2ef1e8dd13a1bb3a52a3e193054294b5b2dae5cacf0720372aa0b5"],"state_sha256":"93596386aaf8d7feb6595ac9d487b2c47e73b5895b7885168fdb6bbf2da993b5"}