{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:N423DF74Y75VK3L4XHXMNJPYKP","short_pith_number":"pith:N423DF74","canonical_record":{"source":{"id":"1110.0854","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-10-04T21:20:03Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"223243f6ea437242c8686974644f840070eb63ad60d9996078e031f7fec60ca4","abstract_canon_sha256":"3305220584c4fd6bd5e78085eda04353eab544374fe4d242021574b8eba40137"},"schema_version":"1.0"},"canonical_sha256":"6f35b197fcc7fb556d7cb9eec6a5f853dadb269c0c4acc7760b1950d0caa0806","source":{"kind":"arxiv","id":"1110.0854","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1110.0854","created_at":"2026-05-18T02:00:17Z"},{"alias_kind":"arxiv_version","alias_value":"1110.0854v2","created_at":"2026-05-18T02:00:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1110.0854","created_at":"2026-05-18T02:00:17Z"},{"alias_kind":"pith_short_12","alias_value":"N423DF74Y75V","created_at":"2026-05-18T12:26:37Z"},{"alias_kind":"pith_short_16","alias_value":"N423DF74Y75VK3L4","created_at":"2026-05-18T12:26:37Z"},{"alias_kind":"pith_short_8","alias_value":"N423DF74","created_at":"2026-05-18T12:26:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:N423DF74Y75VK3L4XHXMNJPYKP","target":"record","payload":{"canonical_record":{"source":{"id":"1110.0854","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-10-04T21:20:03Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"223243f6ea437242c8686974644f840070eb63ad60d9996078e031f7fec60ca4","abstract_canon_sha256":"3305220584c4fd6bd5e78085eda04353eab544374fe4d242021574b8eba40137"},"schema_version":"1.0"},"canonical_sha256":"6f35b197fcc7fb556d7cb9eec6a5f853dadb269c0c4acc7760b1950d0caa0806","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:00:17.818834Z","signature_b64":"GScaw6HsnSMbPJQnVfBl/WhzaDW/q/IVBxKyAHel6/xRjBzuTwuXfLlTRAzIGfbM3cxg2geaTKgs92sQfSRxAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6f35b197fcc7fb556d7cb9eec6a5f853dadb269c0c4acc7760b1950d0caa0806","last_reissued_at":"2026-05-18T02:00:17.818237Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:00:17.818237Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1110.0854","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:00:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8BaAoMhT5f57J7AWpZkk8MPDoy0cpwYFScniHmZS2qsbg6kA1qlwsInPtvG0IK0gqbGnUtsKGi5+HeCM8We2AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T04:18:43.819902Z"},"content_sha256":"5c9e5780777c451db08ba6d2bc80c697c79329da7099b38d081a56da67da5d41","schema_version":"1.0","event_id":"sha256:5c9e5780777c451db08ba6d2bc80c697c79329da7099b38d081a56da67da5d41"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:N423DF74Y75VK3L4XHXMNJPYKP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The UV peak in Active Galactic Nuclei : a false continuum from blurred reflection ?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.CO","authors_text":"Andy Lawrence","submitted_at":"2011-10-04T21:20:03Z","abstract_excerpt":"I summarise and analyse key problems with observations of the UV bump in Active Galactic Nuclei (AGN), and especially the accretion disc interpretation - the temperature problem, the ionisation problem, the timescale problem, and the co-ordination problem - and suggest that all these problems can be solved if, in addition to the accretion disc, there is a population of cold, thick clouds at approximately 30R_S which reprocess the intrinsic continuum. Exploring cloud parameter space, I find that clouds with density n~10^12 cm^-3 and column N_H >4 X 10^24 cm^-2 reflect most of the intrinsic cont"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1110.0854","kind":"arxiv","version":2},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:00:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HQWyvodUU5YCZ4dAJIolNzkYdPom4F6YXZJUSyUfHxJloJqheuz7uLfy8pHCyH8uUAvm1ZXgUMj8FDZGG7d7Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T04:18:43.820590Z"},"content_sha256":"7dad1f4607e7c8cd37dc99354f3fc6263fb200563ec2b1c2ae6a7e84672fdc10","schema_version":"1.0","event_id":"sha256:7dad1f4607e7c8cd37dc99354f3fc6263fb200563ec2b1c2ae6a7e84672fdc10"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/N423DF74Y75VK3L4XHXMNJPYKP/bundle.json","state_url":"https://pith.science/pith/N423DF74Y75VK3L4XHXMNJPYKP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/N423DF74Y75VK3L4XHXMNJPYKP/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-11T04:18:43Z","links":{"resolver":"https://pith.science/pith/N423DF74Y75VK3L4XHXMNJPYKP","bundle":"https://pith.science/pith/N423DF74Y75VK3L4XHXMNJPYKP/bundle.json","state":"https://pith.science/pith/N423DF74Y75VK3L4XHXMNJPYKP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/N423DF74Y75VK3L4XHXMNJPYKP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:N423DF74Y75VK3L4XHXMNJPYKP","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":"3305220584c4fd6bd5e78085eda04353eab544374fe4d242021574b8eba40137","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-10-04T21:20:03Z","title_canon_sha256":"223243f6ea437242c8686974644f840070eb63ad60d9996078e031f7fec60ca4"},"schema_version":"1.0","source":{"id":"1110.0854","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1110.0854","created_at":"2026-05-18T02:00:17Z"},{"alias_kind":"arxiv_version","alias_value":"1110.0854v2","created_at":"2026-05-18T02:00:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1110.0854","created_at":"2026-05-18T02:00:17Z"},{"alias_kind":"pith_short_12","alias_value":"N423DF74Y75V","created_at":"2026-05-18T12:26:37Z"},{"alias_kind":"pith_short_16","alias_value":"N423DF74Y75VK3L4","created_at":"2026-05-18T12:26:37Z"},{"alias_kind":"pith_short_8","alias_value":"N423DF74","created_at":"2026-05-18T12:26:37Z"}],"graph_snapshots":[{"event_id":"sha256:7dad1f4607e7c8cd37dc99354f3fc6263fb200563ec2b1c2ae6a7e84672fdc10","target":"graph","created_at":"2026-05-18T02:00:17Z","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":"I summarise and analyse key problems with observations of the UV bump in Active Galactic Nuclei (AGN), and especially the accretion disc interpretation - the temperature problem, the ionisation problem, the timescale problem, and the co-ordination problem - and suggest that all these problems can be solved if, in addition to the accretion disc, there is a population of cold, thick clouds at approximately 30R_S which reprocess the intrinsic continuum. Exploring cloud parameter space, I find that clouds with density n~10^12 cm^-3 and column N_H >4 X 10^24 cm^-2 reflect most of the intrinsic cont","authors_text":"Andy Lawrence","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-10-04T21:20:03Z","title":"The UV peak in Active Galactic Nuclei : a false continuum from blurred reflection ?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1110.0854","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":"sha256:5c9e5780777c451db08ba6d2bc80c697c79329da7099b38d081a56da67da5d41","target":"record","created_at":"2026-05-18T02:00:17Z","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":"3305220584c4fd6bd5e78085eda04353eab544374fe4d242021574b8eba40137","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-10-04T21:20:03Z","title_canon_sha256":"223243f6ea437242c8686974644f840070eb63ad60d9996078e031f7fec60ca4"},"schema_version":"1.0","source":{"id":"1110.0854","kind":"arxiv","version":2}},"canonical_sha256":"6f35b197fcc7fb556d7cb9eec6a5f853dadb269c0c4acc7760b1950d0caa0806","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6f35b197fcc7fb556d7cb9eec6a5f853dadb269c0c4acc7760b1950d0caa0806","first_computed_at":"2026-05-18T02:00:17.818237Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:00:17.818237Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GScaw6HsnSMbPJQnVfBl/WhzaDW/q/IVBxKyAHel6/xRjBzuTwuXfLlTRAzIGfbM3cxg2geaTKgs92sQfSRxAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:00:17.818834Z","signed_message":"canonical_sha256_bytes"},"source_id":"1110.0854","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5c9e5780777c451db08ba6d2bc80c697c79329da7099b38d081a56da67da5d41","sha256:7dad1f4607e7c8cd37dc99354f3fc6263fb200563ec2b1c2ae6a7e84672fdc10"],"state_sha256":"9d40142ec0e03a7a5ba586d12d30cd3e213a4e3ed980ecfc87fcdf5931faa9ea"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HSwrDLb5q465rekfoy6kFYVM3s5hqqfyuAtABnu8agipHBO6xRi/4U2qRoWGul3eTSYasmNWq63arjQLqTyzDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-11T04:18:43.824296Z","bundle_sha256":"8ee2513fcd388e66137c001b0adfd4861107faa1f6d3f1e7c2c1fe85ec5d40bb"}}