{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2006:3TVE7TTP6UOOIYLA4ENANN25OC","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":"84d8ff4cd5fd3c8eb20b0cb0748a0eccb8e9b01a3674416b881ffd7e4fa55e77","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-03-13T17:50:23Z","title_canon_sha256":"63ee133ec9acfa3c6f43f5bd461f9f109cf10d7a8e3d1a9dd668e8bdae443e56"},"schema_version":"1.0","source":{"id":"astro-ph/0603313","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0603313","created_at":"2026-05-18T04:18:14Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0603313v1","created_at":"2026-05-18T04:18:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0603313","created_at":"2026-05-18T04:18:14Z"},{"alias_kind":"pith_short_12","alias_value":"3TVE7TTP6UOO","created_at":"2026-05-18T12:25:53Z"},{"alias_kind":"pith_short_16","alias_value":"3TVE7TTP6UOOIYLA","created_at":"2026-05-18T12:25:53Z"},{"alias_kind":"pith_short_8","alias_value":"3TVE7TTP","created_at":"2026-05-18T12:25:53Z"}],"graph_snapshots":[{"event_id":"sha256:292448aa2e89419bb55caf20bb0b56002a42a35c047122921b13fca12830df87","target":"graph","created_at":"2026-05-18T04:18:14Z","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":"We investigate why half of X-ray--selected active galactic nuclei (AGN) in deep surveys lack signs of accretion in their optical spectra. The majority of these ``optically--dull'' AGN are no more than 6 times fainter than their host galaxies in rest-frame R-band; as such, AGN lines are unlikely to be overwhelmed by stellar continuum in at least half the sample. We find that optically--dull AGN have the mid--infrared emission and L(x)/L(IR) ratios characteristic of local Seyferts, suggesting that the cause of optical dullness is not missing UV--optical continua. We compare the morphologies of 2","authors_text":"(2) CSIC), A. Alonso-Herrero (2), G. H. Rieke (1), J. L. Donley (1), J. R. Rigby (1), P. G. P\\'erez-Gonz\\'alez (1) ((1) Steward Observatory","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2006-03-13T17:50:23Z","title":"Why X-ray--Selected AGN Appear Optically Dull"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0603313","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":"sha256:42877e143b863bf2b666649dae0f14510390deae1ff3842f455b8c04e220d72e","target":"record","created_at":"2026-05-18T04:18:14Z","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":"84d8ff4cd5fd3c8eb20b0cb0748a0eccb8e9b01a3674416b881ffd7e4fa55e77","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-03-13T17:50:23Z","title_canon_sha256":"63ee133ec9acfa3c6f43f5bd461f9f109cf10d7a8e3d1a9dd668e8bdae443e56"},"schema_version":"1.0","source":{"id":"astro-ph/0603313","kind":"arxiv","version":1}},"canonical_sha256":"dcea4fce6ff51ce46160e11a06b75d70bae34683843226eaab08e616d5ac0cb7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dcea4fce6ff51ce46160e11a06b75d70bae34683843226eaab08e616d5ac0cb7","first_computed_at":"2026-05-18T04:18:14.323935Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:18:14.323935Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fDO9AAyloPzamJWt5wl1cVE2Z/F1oYneFaZuAfjycO5ZSfhSzcPaIU2RSAdve+4L/yVXIzD6+IiDj3rxnbJ6Dw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:18:14.324675Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0603313","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:42877e143b863bf2b666649dae0f14510390deae1ff3842f455b8c04e220d72e","sha256:292448aa2e89419bb55caf20bb0b56002a42a35c047122921b13fca12830df87"],"state_sha256":"7b0969a571d80f3cd4ffe596605c27b4e9d44bd283d3c73b0491a8e85368007c"}