{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:5KUESZQCFF4A2P26IZCHXVLRC4","short_pith_number":"pith:5KUESZQC","canonical_record":{"source":{"id":"1805.00046","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-04-30T18:16:17Z","cross_cats_sorted":[],"title_canon_sha256":"cbfc8d0878698ffa18688a65a4c5c4fa25e57bd91c7613e0762a53eca0d8becf","abstract_canon_sha256":"af01bc1cbc71ef6b8dbc0945faf1baaa40aeb61d60abad4ae37b26a4eded8f17"},"schema_version":"1.0"},"canonical_sha256":"eaa849660229780d3f5e46447bd571171ad04e9dffbb6d347fa1ac811aa129a9","source":{"kind":"arxiv","id":"1805.00046","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.00046","created_at":"2026-05-18T00:15:54Z"},{"alias_kind":"arxiv_version","alias_value":"1805.00046v1","created_at":"2026-05-18T00:15:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.00046","created_at":"2026-05-18T00:15:54Z"},{"alias_kind":"pith_short_12","alias_value":"5KUESZQCFF4A","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_16","alias_value":"5KUESZQCFF4A2P26","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_8","alias_value":"5KUESZQC","created_at":"2026-05-18T12:32:08Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:5KUESZQCFF4A2P26IZCHXVLRC4","target":"record","payload":{"canonical_record":{"source":{"id":"1805.00046","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-04-30T18:16:17Z","cross_cats_sorted":[],"title_canon_sha256":"cbfc8d0878698ffa18688a65a4c5c4fa25e57bd91c7613e0762a53eca0d8becf","abstract_canon_sha256":"af01bc1cbc71ef6b8dbc0945faf1baaa40aeb61d60abad4ae37b26a4eded8f17"},"schema_version":"1.0"},"canonical_sha256":"eaa849660229780d3f5e46447bd571171ad04e9dffbb6d347fa1ac811aa129a9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:15:54.333984Z","signature_b64":"luFRVOkeG9vySqLha4Px3PFpzj2+S0HoeOgTck2m3KMAO1Wq3BqonbMhQw+9KMMqntlxkglV2IONqzxoZ1+BCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"eaa849660229780d3f5e46447bd571171ad04e9dffbb6d347fa1ac811aa129a9","last_reissued_at":"2026-05-18T00:15:54.333310Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:15:54.333310Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1805.00046","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:15:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4sf95gszypmzDvxeTr4GEukejYqwzJlXkLKxn2/7Ab8U5No4ZGg29gVSMXIsfRsM90Ujpuqh+X602qq3IH+XBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T14:48:15.656245Z"},"content_sha256":"e502177fe8fb468e878be8977777d7a9bb42929876b76a3ff99517e4d2b9c420","schema_version":"1.0","event_id":"sha256:e502177fe8fb468e878be8977777d7a9bb42929876b76a3ff99517e4d2b9c420"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:5KUESZQCFF4A2P26IZCHXVLRC4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"X-ray short-time lags in the Fe-K energy band produced by scattering clouds in active galactic nuclei","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Chris Done, Hirokazu Odaka, Ken Ebisawa, Kouichi Hagino, Masahiro Tsujimoto, Misaki Mizumoto","submitted_at":"2018-04-30T18:16:17Z","abstract_excerpt":"X-rays illuminating the accretion disc in active galactic nuclei give rise to an iron K line and its associated reflection spectrum which are lagged behind the continuum variability by the light-travel time from the source to the disc. The measured lag timescales in the iron band can be as short as $\\sim R_g/c$, where $R_g$ is the gravitational radius, which is often interpreted as evidence for a very small continuum source close to the event horizon of a rapidly spinning black hole. However, the short lags can also be produced by reflection from more distant material, because the primary phot"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.00046","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:15:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7nVFzSX72OU+EjjvxpYA+ffbXrjAyoIZvEoia2jICcMnO24lYbYHC5sZ1GNKxpmIMpRlA+6rFgcraQQE6TF3AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T14:48:15.656629Z"},"content_sha256":"eb72e31fdd2b6a8b9ac8597a6f68278662a9aba6544243567dea9320e5e09a12","schema_version":"1.0","event_id":"sha256:eb72e31fdd2b6a8b9ac8597a6f68278662a9aba6544243567dea9320e5e09a12"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5KUESZQCFF4A2P26IZCHXVLRC4/bundle.json","state_url":"https://pith.science/pith/5KUESZQCFF4A2P26IZCHXVLRC4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5KUESZQCFF4A2P26IZCHXVLRC4/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":"2026-06-03T14:48:15Z","links":{"resolver":"https://pith.science/pith/5KUESZQCFF4A2P26IZCHXVLRC4","bundle":"https://pith.science/pith/5KUESZQCFF4A2P26IZCHXVLRC4/bundle.json","state":"https://pith.science/pith/5KUESZQCFF4A2P26IZCHXVLRC4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5KUESZQCFF4A2P26IZCHXVLRC4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:5KUESZQCFF4A2P26IZCHXVLRC4","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":"af01bc1cbc71ef6b8dbc0945faf1baaa40aeb61d60abad4ae37b26a4eded8f17","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-04-30T18:16:17Z","title_canon_sha256":"cbfc8d0878698ffa18688a65a4c5c4fa25e57bd91c7613e0762a53eca0d8becf"},"schema_version":"1.0","source":{"id":"1805.00046","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.00046","created_at":"2026-05-18T00:15:54Z"},{"alias_kind":"arxiv_version","alias_value":"1805.00046v1","created_at":"2026-05-18T00:15:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.00046","created_at":"2026-05-18T00:15:54Z"},{"alias_kind":"pith_short_12","alias_value":"5KUESZQCFF4A","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_16","alias_value":"5KUESZQCFF4A2P26","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_8","alias_value":"5KUESZQC","created_at":"2026-05-18T12:32:08Z"}],"graph_snapshots":[{"event_id":"sha256:eb72e31fdd2b6a8b9ac8597a6f68278662a9aba6544243567dea9320e5e09a12","target":"graph","created_at":"2026-05-18T00:15:54Z","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":"X-rays illuminating the accretion disc in active galactic nuclei give rise to an iron K line and its associated reflection spectrum which are lagged behind the continuum variability by the light-travel time from the source to the disc. The measured lag timescales in the iron band can be as short as $\\sim R_g/c$, where $R_g$ is the gravitational radius, which is often interpreted as evidence for a very small continuum source close to the event horizon of a rapidly spinning black hole. However, the short lags can also be produced by reflection from more distant material, because the primary phot","authors_text":"Chris Done, Hirokazu Odaka, Ken Ebisawa, Kouichi Hagino, Masahiro Tsujimoto, Misaki Mizumoto","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-04-30T18:16:17Z","title":"X-ray short-time lags in the Fe-K energy band produced by scattering clouds in active galactic nuclei"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.00046","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:e502177fe8fb468e878be8977777d7a9bb42929876b76a3ff99517e4d2b9c420","target":"record","created_at":"2026-05-18T00:15:54Z","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":"af01bc1cbc71ef6b8dbc0945faf1baaa40aeb61d60abad4ae37b26a4eded8f17","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-04-30T18:16:17Z","title_canon_sha256":"cbfc8d0878698ffa18688a65a4c5c4fa25e57bd91c7613e0762a53eca0d8becf"},"schema_version":"1.0","source":{"id":"1805.00046","kind":"arxiv","version":1}},"canonical_sha256":"eaa849660229780d3f5e46447bd571171ad04e9dffbb6d347fa1ac811aa129a9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"eaa849660229780d3f5e46447bd571171ad04e9dffbb6d347fa1ac811aa129a9","first_computed_at":"2026-05-18T00:15:54.333310Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:15:54.333310Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"luFRVOkeG9vySqLha4Px3PFpzj2+S0HoeOgTck2m3KMAO1Wq3BqonbMhQw+9KMMqntlxkglV2IONqzxoZ1+BCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:15:54.333984Z","signed_message":"canonical_sha256_bytes"},"source_id":"1805.00046","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e502177fe8fb468e878be8977777d7a9bb42929876b76a3ff99517e4d2b9c420","sha256:eb72e31fdd2b6a8b9ac8597a6f68278662a9aba6544243567dea9320e5e09a12"],"state_sha256":"7b454144704d6315fe7e7e448c6238b541ce8fcc9d3d7cf4a4e0c50283094889"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aAk7aEUTLRUcNO1+qr6Eaa5Q2XHYMPQ6v7ELtuKQ7K+PqDcEvUslkyPm74dEwrMYSCob4+BpvMy16iTS1vftAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T14:48:15.658609Z","bundle_sha256":"d7e4a97e7d2b01c412c4ce73538fae62d0a2409f700e01a5073f85e9d3f9db87"}}