{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2007:VQYYSSHSJZEBMDZO5XLXYTNVTW","short_pith_number":"pith:VQYYSSHS","canonical_record":{"source":{"id":"0709.3877","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-09-25T07:50:11Z","cross_cats_sorted":[],"title_canon_sha256":"7dc942412b28f8e340cd6c6cf34df91abc33c890bff9c9a41085e5a1bb0bc3b7","abstract_canon_sha256":"89cb3b991bbcc03b3e953ebeb7bba86d3749d6d9f5a7ccecb8f4e3a2ef5a4748"},"schema_version":"1.0"},"canonical_sha256":"ac318948f24e48160f2eedd77c4db59dbafd1449b62ae2a39af670144d12f6e6","source":{"kind":"arxiv","id":"0709.3877","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0709.3877","created_at":"2026-07-04T17:05:51Z"},{"alias_kind":"arxiv_version","alias_value":"0709.3877v2","created_at":"2026-07-04T17:05:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0709.3877","created_at":"2026-07-04T17:05:51Z"},{"alias_kind":"pith_short_12","alias_value":"VQYYSSHSJZEB","created_at":"2026-07-04T17:05:51Z"},{"alias_kind":"pith_short_16","alias_value":"VQYYSSHSJZEBMDZO","created_at":"2026-07-04T17:05:51Z"},{"alias_kind":"pith_short_8","alias_value":"VQYYSSHS","created_at":"2026-07-04T17:05:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2007:VQYYSSHSJZEBMDZO5XLXYTNVTW","target":"record","payload":{"canonical_record":{"source":{"id":"0709.3877","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-09-25T07:50:11Z","cross_cats_sorted":[],"title_canon_sha256":"7dc942412b28f8e340cd6c6cf34df91abc33c890bff9c9a41085e5a1bb0bc3b7","abstract_canon_sha256":"89cb3b991bbcc03b3e953ebeb7bba86d3749d6d9f5a7ccecb8f4e3a2ef5a4748"},"schema_version":"1.0"},"canonical_sha256":"ac318948f24e48160f2eedd77c4db59dbafd1449b62ae2a39af670144d12f6e6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:05:51.314287Z","signature_b64":"237KpHXkDHGADaxFmNO6qTFZd4hVbUlPhGF3r6V7DOoomEgkKP6aFYLD/26mCvhxoES553lhkQR+r5yaKVKeCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ac318948f24e48160f2eedd77c4db59dbafd1449b62ae2a39af670144d12f6e6","last_reissued_at":"2026-07-04T17:05:51.313866Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:05:51.313866Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0709.3877","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":"2026-07-04T17:05:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Twlvgo4y7V7g5XgADwcfB3CKAQ9Uss8ukLy0Hz/lsG/a4H8QbGPdCWgzzZQxSMg7iHE6lZnqq1teO1hlQaDRBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T14:58:25.701352Z"},"content_sha256":"f2dd1d06429a83779c913f00186f54d30c20689db827d56808f45de95565e297","schema_version":"1.0","event_id":"sha256:f2dd1d06429a83779c913f00186f54d30c20689db827d56808f45de95565e297"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2007:VQYYSSHSJZEBMDZO5XLXYTNVTW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Cosmic MeV Gamma-ray Background and Hard X-ray Spectra of Active Galactic Nuclei: Implications for the Origin of Hot AGN Coronae","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Tomonori Totani, Yoshihiro Ueda (Kyoto University), Yoshiyuki Inoue","submitted_at":"2007-09-25T07:50:11Z","abstract_excerpt":"The origin of the extragalactic gamma-ray background radiation at 1-10 MeV is still unknown. Although the cosmic X-ray background (CXB) up to a few hundreds keV can be accounted for by the sum of Active Galactic Nuclei (AGNs), current models of AGN spectra cannot explain the background spectrum beyond ~1 MeV, because of the thermal exponential cutoff of electron energy distribution assumed in the models. Here we construct a new spectral model by calculating the Comptonization process including nonthermal electrons, which are expected to exist in an AGN hot corona if it is heated by magnetic re"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0709.3877","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0709.3877/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T17:05:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"apSYoLlaqg/Tq6DEmuDYrLpgC7F6sgQcSFYlAA+l7unjAs9O9Rb8eiLm6zlf03lqxdoO/FLXGLbF/AkuSkruBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T14:58:25.701858Z"},"content_sha256":"1f70e7851c7d3a966244a32df1543bdce43ca47a05afc65b2ee7def6e073ca97","schema_version":"1.0","event_id":"sha256:1f70e7851c7d3a966244a32df1543bdce43ca47a05afc65b2ee7def6e073ca97"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VQYYSSHSJZEBMDZO5XLXYTNVTW/bundle.json","state_url":"https://pith.science/pith/VQYYSSHSJZEBMDZO5XLXYTNVTW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VQYYSSHSJZEBMDZO5XLXYTNVTW/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":"2026-08-05T14:58:25Z","links":{"resolver":"https://pith.science/pith/VQYYSSHSJZEBMDZO5XLXYTNVTW","bundle":"https://pith.science/pith/VQYYSSHSJZEBMDZO5XLXYTNVTW/bundle.json","state":"https://pith.science/pith/VQYYSSHSJZEBMDZO5XLXYTNVTW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VQYYSSHSJZEBMDZO5XLXYTNVTW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:VQYYSSHSJZEBMDZO5XLXYTNVTW","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":"89cb3b991bbcc03b3e953ebeb7bba86d3749d6d9f5a7ccecb8f4e3a2ef5a4748","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-09-25T07:50:11Z","title_canon_sha256":"7dc942412b28f8e340cd6c6cf34df91abc33c890bff9c9a41085e5a1bb0bc3b7"},"schema_version":"1.0","source":{"id":"0709.3877","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0709.3877","created_at":"2026-07-04T17:05:51Z"},{"alias_kind":"arxiv_version","alias_value":"0709.3877v2","created_at":"2026-07-04T17:05:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0709.3877","created_at":"2026-07-04T17:05:51Z"},{"alias_kind":"pith_short_12","alias_value":"VQYYSSHSJZEB","created_at":"2026-07-04T17:05:51Z"},{"alias_kind":"pith_short_16","alias_value":"VQYYSSHSJZEBMDZO","created_at":"2026-07-04T17:05:51Z"},{"alias_kind":"pith_short_8","alias_value":"VQYYSSHS","created_at":"2026-07-04T17:05:51Z"}],"graph_snapshots":[{"event_id":"sha256:1f70e7851c7d3a966244a32df1543bdce43ca47a05afc65b2ee7def6e073ca97","target":"graph","created_at":"2026-07-04T17:05:51Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/0709.3877/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The origin of the extragalactic gamma-ray background radiation at 1-10 MeV is still unknown. Although the cosmic X-ray background (CXB) up to a few hundreds keV can be accounted for by the sum of Active Galactic Nuclei (AGNs), current models of AGN spectra cannot explain the background spectrum beyond ~1 MeV, because of the thermal exponential cutoff of electron energy distribution assumed in the models. Here we construct a new spectral model by calculating the Comptonization process including nonthermal electrons, which are expected to exist in an AGN hot corona if it is heated by magnetic re","authors_text":"Tomonori Totani, Yoshihiro Ueda (Kyoto University), Yoshiyuki Inoue","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2007-09-25T07:50:11Z","title":"The Cosmic MeV Gamma-ray Background and Hard X-ray Spectra of Active Galactic Nuclei: Implications for the Origin of Hot AGN Coronae"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0709.3877","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:f2dd1d06429a83779c913f00186f54d30c20689db827d56808f45de95565e297","target":"record","created_at":"2026-07-04T17:05:51Z","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":"89cb3b991bbcc03b3e953ebeb7bba86d3749d6d9f5a7ccecb8f4e3a2ef5a4748","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-09-25T07:50:11Z","title_canon_sha256":"7dc942412b28f8e340cd6c6cf34df91abc33c890bff9c9a41085e5a1bb0bc3b7"},"schema_version":"1.0","source":{"id":"0709.3877","kind":"arxiv","version":2}},"canonical_sha256":"ac318948f24e48160f2eedd77c4db59dbafd1449b62ae2a39af670144d12f6e6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ac318948f24e48160f2eedd77c4db59dbafd1449b62ae2a39af670144d12f6e6","first_computed_at":"2026-07-04T17:05:51.313866Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:05:51.313866Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"237KpHXkDHGADaxFmNO6qTFZd4hVbUlPhGF3r6V7DOoomEgkKP6aFYLD/26mCvhxoES553lhkQR+r5yaKVKeCg==","signature_status":"signed_v1","signed_at":"2026-07-04T17:05:51.314287Z","signed_message":"canonical_sha256_bytes"},"source_id":"0709.3877","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f2dd1d06429a83779c913f00186f54d30c20689db827d56808f45de95565e297","sha256:1f70e7851c7d3a966244a32df1543bdce43ca47a05afc65b2ee7def6e073ca97"],"state_sha256":"d20a7f2f104db148b52d5a6877502f340799aa98bc2dc2d521e1cbb7a89ebd00"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MvfjhYh+9EoXoN2yvuFQCjsoHTN6Wlxb6LkV623sKpoBHzeY/8XF6xcjXW9nAtGTEy4m5Mtmxcwa+K2rrmPVDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T14:58:25.705396Z","bundle_sha256":"b75fa845159e580b877298a11a628d69ed8f4533c6e30d7fdc438ef6be0f459d"}}