{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2007:5QYOSMOKKLDMDOSFPBEQ2FHEI3","short_pith_number":"pith:5QYOSMOK","canonical_record":{"source":{"id":"0709.2230","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-09-14T08:53:23Z","cross_cats_sorted":[],"title_canon_sha256":"c2ae6e1a51638a1e0d9fa77c56c3c4e9fa3fe95f1693647c6ccd8166c007b450","abstract_canon_sha256":"7c6a5a7bd4bb8bd03e40a5c6b175186f60f005da7f29879dec8708c4ade1139b"},"schema_version":"1.0"},"canonical_sha256":"ec30e931ca52c6c1ba4578490d14e446e5b4d4b7fa5f37779f7603a8c8894afb","source":{"kind":"arxiv","id":"0709.2230","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0709.2230","created_at":"2026-05-18T02:16:11Z"},{"alias_kind":"arxiv_version","alias_value":"0709.2230v1","created_at":"2026-05-18T02:16:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0709.2230","created_at":"2026-05-18T02:16:11Z"},{"alias_kind":"pith_short_12","alias_value":"5QYOSMOKKLDM","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_16","alias_value":"5QYOSMOKKLDMDOSF","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_8","alias_value":"5QYOSMOK","created_at":"2026-05-18T12:25:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2007:5QYOSMOKKLDMDOSFPBEQ2FHEI3","target":"record","payload":{"canonical_record":{"source":{"id":"0709.2230","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-09-14T08:53:23Z","cross_cats_sorted":[],"title_canon_sha256":"c2ae6e1a51638a1e0d9fa77c56c3c4e9fa3fe95f1693647c6ccd8166c007b450","abstract_canon_sha256":"7c6a5a7bd4bb8bd03e40a5c6b175186f60f005da7f29879dec8708c4ade1139b"},"schema_version":"1.0"},"canonical_sha256":"ec30e931ca52c6c1ba4578490d14e446e5b4d4b7fa5f37779f7603a8c8894afb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:16:11.246490Z","signature_b64":"TwFKT1qjY5K6/twbPgUq3wsPg3BXhSeXOqwpQlpUK1y1XeS6ZFxlr5VT7hiwAaSkpy20GHgL5afCDeK3n5W7Dg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ec30e931ca52c6c1ba4578490d14e446e5b4d4b7fa5f37779f7603a8c8894afb","last_reissued_at":"2026-05-18T02:16:11.245631Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:16:11.245631Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0709.2230","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":"2026-05-18T02:16:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9/w2k23F2/170mFusVOzBoYm7p/ezHT8QgarZWNNpPBDc8JxkZOUfqk2AO3WO/B62S5EMjWcOQtkz1Mv5vI+Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T08:33:38.459083Z"},"content_sha256":"e0ebfc2bf9f6964f631ff5e3540b5c3430a809a37bcdfd9a71347fe15c999a48","schema_version":"1.0","event_id":"sha256:e0ebfc2bf9f6964f631ff5e3540b5c3430a809a37bcdfd9a71347fe15c999a48"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2007:5QYOSMOKKLDMDOSFPBEQ2FHEI3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Hard X-ray Variability of AGN","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"2, 2), (2) Observatoire Astronomique de l'Universite de Geneve, 3), (3) CSST/UMBC, (4) ASD NASA/GSFC), G. Wendt (1) ((1) ISDC, J. Tueller (4), N. Gehrels (4), S. D. Barthelmy (4), S. Soldi (1, T.J.-L. Courvoisier (1, V. Beckmann (1","submitted_at":"2007-09-14T08:53:23Z","abstract_excerpt":"Aims: Active Galactic Nuclei are known to be variable throughout the electromagnetic spectrum. An energy domain poorly studied in this respect is the hard X-ray range above 20 keV.\n  Methods: The first 9 months of the Swift/BAT all-sky survey are used to study the 14 - 195 keV variability of the 44 brightest AGN. The sources have been selected due to their detection significance of >10 sigma. We tested the variability using a maximum likelihood estimator and by analysing the structure function.\n  Results: Probing different time scales, it appears that the absorbed AGN are more variable than th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0709.2230","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":"2026-05-18T02:16:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XJTKIEQUaVgyx+TjLzMnA+fcgIA9oZUvJZaZUKWT7PvrZuLrqotpVcFDDsAGLyRsUfhVbywXzRC7R2ogcSuoAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T08:33:38.459805Z"},"content_sha256":"e3d44d569d4726513a63f289fc45e3ec152efab9825dbdd9b9a1c15375502474","schema_version":"1.0","event_id":"sha256:e3d44d569d4726513a63f289fc45e3ec152efab9825dbdd9b9a1c15375502474"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5QYOSMOKKLDMDOSFPBEQ2FHEI3/bundle.json","state_url":"https://pith.science/pith/5QYOSMOKKLDMDOSFPBEQ2FHEI3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5QYOSMOKKLDMDOSFPBEQ2FHEI3/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":"2026-05-19T08:33:38Z","links":{"resolver":"https://pith.science/pith/5QYOSMOKKLDMDOSFPBEQ2FHEI3","bundle":"https://pith.science/pith/5QYOSMOKKLDMDOSFPBEQ2FHEI3/bundle.json","state":"https://pith.science/pith/5QYOSMOKKLDMDOSFPBEQ2FHEI3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5QYOSMOKKLDMDOSFPBEQ2FHEI3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:5QYOSMOKKLDMDOSFPBEQ2FHEI3","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":"7c6a5a7bd4bb8bd03e40a5c6b175186f60f005da7f29879dec8708c4ade1139b","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-09-14T08:53:23Z","title_canon_sha256":"c2ae6e1a51638a1e0d9fa77c56c3c4e9fa3fe95f1693647c6ccd8166c007b450"},"schema_version":"1.0","source":{"id":"0709.2230","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0709.2230","created_at":"2026-05-18T02:16:11Z"},{"alias_kind":"arxiv_version","alias_value":"0709.2230v1","created_at":"2026-05-18T02:16:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0709.2230","created_at":"2026-05-18T02:16:11Z"},{"alias_kind":"pith_short_12","alias_value":"5QYOSMOKKLDM","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_16","alias_value":"5QYOSMOKKLDMDOSF","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_8","alias_value":"5QYOSMOK","created_at":"2026-05-18T12:25:55Z"}],"graph_snapshots":[{"event_id":"sha256:e3d44d569d4726513a63f289fc45e3ec152efab9825dbdd9b9a1c15375502474","target":"graph","created_at":"2026-05-18T02:16:11Z","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":"Aims: Active Galactic Nuclei are known to be variable throughout the electromagnetic spectrum. An energy domain poorly studied in this respect is the hard X-ray range above 20 keV.\n  Methods: The first 9 months of the Swift/BAT all-sky survey are used to study the 14 - 195 keV variability of the 44 brightest AGN. The sources have been selected due to their detection significance of >10 sigma. We tested the variability using a maximum likelihood estimator and by analysing the structure function.\n  Results: Probing different time scales, it appears that the absorbed AGN are more variable than th","authors_text":"2, 2), (2) Observatoire Astronomique de l'Universite de Geneve, 3), (3) CSST/UMBC, (4) ASD NASA/GSFC), G. Wendt (1) ((1) ISDC, J. Tueller (4), N. Gehrels (4), S. D. Barthelmy (4), S. Soldi (1, T.J.-L. Courvoisier (1, V. Beckmann (1","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2007-09-14T08:53:23Z","title":"Hard X-ray Variability of AGN"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0709.2230","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:e0ebfc2bf9f6964f631ff5e3540b5c3430a809a37bcdfd9a71347fe15c999a48","target":"record","created_at":"2026-05-18T02:16:11Z","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":"7c6a5a7bd4bb8bd03e40a5c6b175186f60f005da7f29879dec8708c4ade1139b","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-09-14T08:53:23Z","title_canon_sha256":"c2ae6e1a51638a1e0d9fa77c56c3c4e9fa3fe95f1693647c6ccd8166c007b450"},"schema_version":"1.0","source":{"id":"0709.2230","kind":"arxiv","version":1}},"canonical_sha256":"ec30e931ca52c6c1ba4578490d14e446e5b4d4b7fa5f37779f7603a8c8894afb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ec30e931ca52c6c1ba4578490d14e446e5b4d4b7fa5f37779f7603a8c8894afb","first_computed_at":"2026-05-18T02:16:11.245631Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:16:11.245631Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TwFKT1qjY5K6/twbPgUq3wsPg3BXhSeXOqwpQlpUK1y1XeS6ZFxlr5VT7hiwAaSkpy20GHgL5afCDeK3n5W7Dg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:16:11.246490Z","signed_message":"canonical_sha256_bytes"},"source_id":"0709.2230","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e0ebfc2bf9f6964f631ff5e3540b5c3430a809a37bcdfd9a71347fe15c999a48","sha256:e3d44d569d4726513a63f289fc45e3ec152efab9825dbdd9b9a1c15375502474"],"state_sha256":"524cfd5d26575c48546d03cf9d2d6c808a35ab02773baf48da0ae9a5705e1fa0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BBQpwrhVj8xHMWHRnTAYd778i5dpZSg5x2Eivf//YDHGADJe8Hqaec3ozQokQYPVr36rUPS7ngziXiF5mqgDBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-19T08:33:38.462937Z","bundle_sha256":"164333b1688a11f49efd572f4cc40a8d22b4810b58e6093ffba6dce3f8ee25a4"}}