{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:YEIGCVTMPFJYS6X7A35IKEEMMZ","short_pith_number":"pith:YEIGCVTM","canonical_record":{"source":{"id":"1405.4660","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-05-19T10:19:37Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"f6cd48dd683b15616a66f69b5f7b51f13b56d8b51ab2cffd5e5665053aa7ad37","abstract_canon_sha256":"3e2f32cf57b17d1c4e1c492509c46bf8698db8d48f9c400411e49554601ee86c"},"schema_version":"1.0"},"canonical_sha256":"c11061566c7953897aff06fa85108c666f341285002d997c6664c3ce79ff43d1","source":{"kind":"arxiv","id":"1405.4660","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1405.4660","created_at":"2026-05-18T01:43:11Z"},{"alias_kind":"arxiv_version","alias_value":"1405.4660v1","created_at":"2026-05-18T01:43:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1405.4660","created_at":"2026-05-18T01:43:11Z"},{"alias_kind":"pith_short_12","alias_value":"YEIGCVTMPFJY","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_16","alias_value":"YEIGCVTMPFJYS6X7","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_8","alias_value":"YEIGCVTM","created_at":"2026-05-18T12:28:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:YEIGCVTMPFJYS6X7A35IKEEMMZ","target":"record","payload":{"canonical_record":{"source":{"id":"1405.4660","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-05-19T10:19:37Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"f6cd48dd683b15616a66f69b5f7b51f13b56d8b51ab2cffd5e5665053aa7ad37","abstract_canon_sha256":"3e2f32cf57b17d1c4e1c492509c46bf8698db8d48f9c400411e49554601ee86c"},"schema_version":"1.0"},"canonical_sha256":"c11061566c7953897aff06fa85108c666f341285002d997c6664c3ce79ff43d1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:43:11.075309Z","signature_b64":"eoRYh4QzQ09D6RMUuv1aac6YHnJ2YGeRZqWhrtm+wv0dYXXgzytOewbCD6sCo/HpaAZf3PGawAg/DpWX4B/5Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c11061566c7953897aff06fa85108c666f341285002d997c6664c3ce79ff43d1","last_reissued_at":"2026-05-18T01:43:11.074694Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:43:11.074694Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1405.4660","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":"2026-05-18T01:43:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Gayw2SCu1ph+EmEruc+jXo9LrqCK58vdVyw3bXQfOzNmlusgX0TaqdGisgkPu/6fRIOpYQB1OyAkUEIsY8p+Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T06:47:45.850112Z"},"content_sha256":"bd5d5e8a373ab0424b71f7ec54557f0257537c8918fe04753d13a2f3f0787ce0","schema_version":"1.0","event_id":"sha256:bd5d5e8a373ab0424b71f7ec54557f0257537c8918fe04753d13a2f3f0787ce0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:YEIGCVTMPFJYS6X7A35IKEEMMZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Search for X-ray occultations in Active Galactic Nuclei","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"G. Risaliti, G. Torricelli-Ciamponi, M. Salvati, P. Pietrini","submitted_at":"2014-05-19T10:19:37Z","abstract_excerpt":"Recent time-resolved spectral studies of a few Active Galactic Nuclei in hard X-rays revealed occultations of the X-ray primary source probably by Broad Line Region (BLR) clouds. An important open question on the structure of the circumnuclear medium of AGN is whether this phenomenon is common, i.e. whether a significant fraction of the X-ray absorption in AGN is due to BLR clouds. Here we present the first attempt to perform this kind of analysis in a homogeneous way, on a statistically representative sample of AGN, consisting of the ~40 brightest sources with long XMM-Newton and/or Suzaku ob"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1405.4660","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":"2026-05-18T01:43:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0e8G9wd/lO3T9ZCKgd5RxOMik1FHKG1ssXGeGgL0PFQLoDNHQcXuZS2ABrKqyrT9eJ9IZKTN8Tem5mHaIOsoBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T06:47:45.850481Z"},"content_sha256":"0cb1ca2fe4a08afd17b57bbc23b8f0f7d2163cf7c3fc6d9d8014fbc08778dc1b","schema_version":"1.0","event_id":"sha256:0cb1ca2fe4a08afd17b57bbc23b8f0f7d2163cf7c3fc6d9d8014fbc08778dc1b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YEIGCVTMPFJYS6X7A35IKEEMMZ/bundle.json","state_url":"https://pith.science/pith/YEIGCVTMPFJYS6X7A35IKEEMMZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YEIGCVTMPFJYS6X7A35IKEEMMZ/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":"2026-06-02T06:47:45Z","links":{"resolver":"https://pith.science/pith/YEIGCVTMPFJYS6X7A35IKEEMMZ","bundle":"https://pith.science/pith/YEIGCVTMPFJYS6X7A35IKEEMMZ/bundle.json","state":"https://pith.science/pith/YEIGCVTMPFJYS6X7A35IKEEMMZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YEIGCVTMPFJYS6X7A35IKEEMMZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:YEIGCVTMPFJYS6X7A35IKEEMMZ","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":"3e2f32cf57b17d1c4e1c492509c46bf8698db8d48f9c400411e49554601ee86c","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-05-19T10:19:37Z","title_canon_sha256":"f6cd48dd683b15616a66f69b5f7b51f13b56d8b51ab2cffd5e5665053aa7ad37"},"schema_version":"1.0","source":{"id":"1405.4660","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1405.4660","created_at":"2026-05-18T01:43:11Z"},{"alias_kind":"arxiv_version","alias_value":"1405.4660v1","created_at":"2026-05-18T01:43:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1405.4660","created_at":"2026-05-18T01:43:11Z"},{"alias_kind":"pith_short_12","alias_value":"YEIGCVTMPFJY","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_16","alias_value":"YEIGCVTMPFJYS6X7","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_8","alias_value":"YEIGCVTM","created_at":"2026-05-18T12:28:57Z"}],"graph_snapshots":[{"event_id":"sha256:0cb1ca2fe4a08afd17b57bbc23b8f0f7d2163cf7c3fc6d9d8014fbc08778dc1b","target":"graph","created_at":"2026-05-18T01:43:11Z","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":"Recent time-resolved spectral studies of a few Active Galactic Nuclei in hard X-rays revealed occultations of the X-ray primary source probably by Broad Line Region (BLR) clouds. An important open question on the structure of the circumnuclear medium of AGN is whether this phenomenon is common, i.e. whether a significant fraction of the X-ray absorption in AGN is due to BLR clouds. Here we present the first attempt to perform this kind of analysis in a homogeneous way, on a statistically representative sample of AGN, consisting of the ~40 brightest sources with long XMM-Newton and/or Suzaku ob","authors_text":"G. Risaliti, G. Torricelli-Ciamponi, M. Salvati, P. Pietrini","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-05-19T10:19:37Z","title":"Search for X-ray occultations in Active Galactic Nuclei"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1405.4660","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:bd5d5e8a373ab0424b71f7ec54557f0257537c8918fe04753d13a2f3f0787ce0","target":"record","created_at":"2026-05-18T01:43:11Z","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":"3e2f32cf57b17d1c4e1c492509c46bf8698db8d48f9c400411e49554601ee86c","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-05-19T10:19:37Z","title_canon_sha256":"f6cd48dd683b15616a66f69b5f7b51f13b56d8b51ab2cffd5e5665053aa7ad37"},"schema_version":"1.0","source":{"id":"1405.4660","kind":"arxiv","version":1}},"canonical_sha256":"c11061566c7953897aff06fa85108c666f341285002d997c6664c3ce79ff43d1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c11061566c7953897aff06fa85108c666f341285002d997c6664c3ce79ff43d1","first_computed_at":"2026-05-18T01:43:11.074694Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:43:11.074694Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eoRYh4QzQ09D6RMUuv1aac6YHnJ2YGeRZqWhrtm+wv0dYXXgzytOewbCD6sCo/HpaAZf3PGawAg/DpWX4B/5Cg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:43:11.075309Z","signed_message":"canonical_sha256_bytes"},"source_id":"1405.4660","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bd5d5e8a373ab0424b71f7ec54557f0257537c8918fe04753d13a2f3f0787ce0","sha256:0cb1ca2fe4a08afd17b57bbc23b8f0f7d2163cf7c3fc6d9d8014fbc08778dc1b"],"state_sha256":"115d3509b9a59a2b30a67f1da3d369c7e379f7225784b27ef3255180703a38bd"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7Bf3II8g9vVmj23vrEjAQ+xf8FQ8h8X4a+2vAgYHnVIrV8c9HDZpqZPs/vJpKOu5U6S5My3dbtEF5aizrX0lAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T06:47:45.852483Z","bundle_sha256":"6647e225c29bbd0ae2cf9e31fd82d24f872a7bc3cebb143893a8247cbb4d0b43"}}