{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:YUZVE6SCL3ZNASLUJZLKALWPOH","short_pith_number":"pith:YUZVE6SC","canonical_record":{"source":{"id":"1907.02523","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-07-04T17:59:37Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"d8e0f88fcd6cabb5a598f2b6e3e1fb20acb06727c6c49d533ec17acb9e43aea6","abstract_canon_sha256":"f501801794ef1b2a600d192802186d4dc703295e8b57271e7a68eb4a9dc2b008"},"schema_version":"1.0"},"canonical_sha256":"c533527a425ef2d049744e56a02ecf71d53a24ee40929fae2e89b7e473e55b66","source":{"kind":"arxiv","id":"1907.02523","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.02523","created_at":"2026-05-17T23:41:28Z"},{"alias_kind":"arxiv_version","alias_value":"1907.02523v1","created_at":"2026-05-17T23:41:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.02523","created_at":"2026-05-17T23:41:28Z"},{"alias_kind":"pith_short_12","alias_value":"YUZVE6SCL3ZN","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_16","alias_value":"YUZVE6SCL3ZNASLU","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_8","alias_value":"YUZVE6SC","created_at":"2026-05-18T12:33:33Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:YUZVE6SCL3ZNASLUJZLKALWPOH","target":"record","payload":{"canonical_record":{"source":{"id":"1907.02523","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-07-04T17:59:37Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"d8e0f88fcd6cabb5a598f2b6e3e1fb20acb06727c6c49d533ec17acb9e43aea6","abstract_canon_sha256":"f501801794ef1b2a600d192802186d4dc703295e8b57271e7a68eb4a9dc2b008"},"schema_version":"1.0"},"canonical_sha256":"c533527a425ef2d049744e56a02ecf71d53a24ee40929fae2e89b7e473e55b66","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:41:28.296304Z","signature_b64":"VfZzgggBfDG0/ukIS9Yjuy0iYalkidFFdC9sKdG0kxp2BrgJVBPKxAkqPiVB+dGhLJ5jtCxI7Q3M6u0bpRiUAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c533527a425ef2d049744e56a02ecf71d53a24ee40929fae2e89b7e473e55b66","last_reissued_at":"2026-05-17T23:41:28.295477Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:41:28.295477Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1907.02523","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":"2026-05-17T23:41:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LhlhBdBwh9h+mqbjSc2aIXeIIs7/WM+zYDv+5BVlfxTd7oySt392RB/BOUgbkFxmqSpfPD7cPPUIq9Sn+WdaDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T16:49:13.190079Z"},"content_sha256":"9df7830cb22b39d84c87ee3e6592d93fbc6496fa8fa89a88f287329f378e3f48","schema_version":"1.0","event_id":"sha256:9df7830cb22b39d84c87ee3e6592d93fbc6496fa8fa89a88f287329f378e3f48"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:YUZVE6SCL3ZNASLUJZLKALWPOH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Reflection geometries in absorbed and unabsorbed AGN","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"Christos Panagiotou, Roland Walter","submitted_at":"2019-07-04T17:59:37Z","abstract_excerpt":"The hard X-ray emission of active galactic nuclei (AGN), and in particular, the reflection component, is shaped by the innermost and outer regions of the galactic nucleus. Our main goal is to investigate the variation of the Compton hump amongst a population of sources and correlate it with other spectral properties to constrain the source geometry. We studied the NuSTAR hard X-ray spectra of a sample of 83 AGN and performed a detailed spectral analysis of each of them. Based on their spectral shape, we divided the sample into five categories and also studied their stacked spectra. We found a "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.02523","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":"2026-05-17T23:41:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DOHPujxddXzN0NJ/WBTpYMBPyuNGAkmZxzoYQ4MS3B4uulEPqyqkwcTmPfzxyGaJaJQA+PStjRfuunhyMAnODA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T16:49:13.190726Z"},"content_sha256":"957ddb71beec15ce0a75e3e88546de2f79be832faf144943510a63af2a229328","schema_version":"1.0","event_id":"sha256:957ddb71beec15ce0a75e3e88546de2f79be832faf144943510a63af2a229328"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YUZVE6SCL3ZNASLUJZLKALWPOH/bundle.json","state_url":"https://pith.science/pith/YUZVE6SCL3ZNASLUJZLKALWPOH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YUZVE6SCL3ZNASLUJZLKALWPOH/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":"2026-05-21T16:49:13Z","links":{"resolver":"https://pith.science/pith/YUZVE6SCL3ZNASLUJZLKALWPOH","bundle":"https://pith.science/pith/YUZVE6SCL3ZNASLUJZLKALWPOH/bundle.json","state":"https://pith.science/pith/YUZVE6SCL3ZNASLUJZLKALWPOH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YUZVE6SCL3ZNASLUJZLKALWPOH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:YUZVE6SCL3ZNASLUJZLKALWPOH","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":"f501801794ef1b2a600d192802186d4dc703295e8b57271e7a68eb4a9dc2b008","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-07-04T17:59:37Z","title_canon_sha256":"d8e0f88fcd6cabb5a598f2b6e3e1fb20acb06727c6c49d533ec17acb9e43aea6"},"schema_version":"1.0","source":{"id":"1907.02523","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.02523","created_at":"2026-05-17T23:41:28Z"},{"alias_kind":"arxiv_version","alias_value":"1907.02523v1","created_at":"2026-05-17T23:41:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.02523","created_at":"2026-05-17T23:41:28Z"},{"alias_kind":"pith_short_12","alias_value":"YUZVE6SCL3ZN","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_16","alias_value":"YUZVE6SCL3ZNASLU","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_8","alias_value":"YUZVE6SC","created_at":"2026-05-18T12:33:33Z"}],"graph_snapshots":[{"event_id":"sha256:957ddb71beec15ce0a75e3e88546de2f79be832faf144943510a63af2a229328","target":"graph","created_at":"2026-05-17T23:41:28Z","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 hard X-ray emission of active galactic nuclei (AGN), and in particular, the reflection component, is shaped by the innermost and outer regions of the galactic nucleus. Our main goal is to investigate the variation of the Compton hump amongst a population of sources and correlate it with other spectral properties to constrain the source geometry. We studied the NuSTAR hard X-ray spectra of a sample of 83 AGN and performed a detailed spectral analysis of each of them. Based on their spectral shape, we divided the sample into five categories and also studied their stacked spectra. We found a ","authors_text":"Christos Panagiotou, Roland Walter","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-07-04T17:59:37Z","title":"Reflection geometries in absorbed and unabsorbed AGN"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.02523","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":"sha256:9df7830cb22b39d84c87ee3e6592d93fbc6496fa8fa89a88f287329f378e3f48","target":"record","created_at":"2026-05-17T23:41:28Z","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":"f501801794ef1b2a600d192802186d4dc703295e8b57271e7a68eb4a9dc2b008","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-07-04T17:59:37Z","title_canon_sha256":"d8e0f88fcd6cabb5a598f2b6e3e1fb20acb06727c6c49d533ec17acb9e43aea6"},"schema_version":"1.0","source":{"id":"1907.02523","kind":"arxiv","version":1}},"canonical_sha256":"c533527a425ef2d049744e56a02ecf71d53a24ee40929fae2e89b7e473e55b66","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c533527a425ef2d049744e56a02ecf71d53a24ee40929fae2e89b7e473e55b66","first_computed_at":"2026-05-17T23:41:28.295477Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:41:28.295477Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VfZzgggBfDG0/ukIS9Yjuy0iYalkidFFdC9sKdG0kxp2BrgJVBPKxAkqPiVB+dGhLJ5jtCxI7Q3M6u0bpRiUAg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:41:28.296304Z","signed_message":"canonical_sha256_bytes"},"source_id":"1907.02523","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9df7830cb22b39d84c87ee3e6592d93fbc6496fa8fa89a88f287329f378e3f48","sha256:957ddb71beec15ce0a75e3e88546de2f79be832faf144943510a63af2a229328"],"state_sha256":"35c0a162c4d000e511b753fb9aebf993021670aedbec6c26f491202a4774db2b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AedjPH7sCLuuzFfapKQMCdebn8nI8Amn3CZTZfwUpD627BmXHCOmXxZT9TUggzlfmMldTT05J1BNUzA5fhGzBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-21T16:49:13.193937Z","bundle_sha256":"23676dfd0cedc8d8eff30b461063c9596c006dfaab5fb9a1c12096768171f4d3"}}