{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2000:XQLEF6OYDEMDFH6JY7RFYRMBXC","short_pith_number":"pith:XQLEF6OY","canonical_record":{"source":{"id":"astro-ph/0005219","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2000-05-10T11:27:13Z","cross_cats_sorted":[],"title_canon_sha256":"825139a972b36e7f81ef545612a415e6fefea6ede6a3c60ddc2c905db4008fd4","abstract_canon_sha256":"51c2099ee51802b1c758a7c1f1e4fdcc3e714216d4b27bef34b923e39aadeb3f"},"schema_version":"1.0"},"canonical_sha256":"bc1642f9d81918329fc9c7e25c4581b8bc2b62a99a4afead3edb8ae724d1d620","source":{"kind":"arxiv","id":"astro-ph/0005219","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0005219","created_at":"2026-05-18T01:07:46Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0005219v1","created_at":"2026-05-18T01:07:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0005219","created_at":"2026-05-18T01:07:46Z"},{"alias_kind":"pith_short_12","alias_value":"XQLEF6OYDEMD","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"XQLEF6OYDEMDFH6J","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"XQLEF6OY","created_at":"2026-05-18T12:25:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2000:XQLEF6OYDEMDFH6JY7RFYRMBXC","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0005219","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2000-05-10T11:27:13Z","cross_cats_sorted":[],"title_canon_sha256":"825139a972b36e7f81ef545612a415e6fefea6ede6a3c60ddc2c905db4008fd4","abstract_canon_sha256":"51c2099ee51802b1c758a7c1f1e4fdcc3e714216d4b27bef34b923e39aadeb3f"},"schema_version":"1.0"},"canonical_sha256":"bc1642f9d81918329fc9c7e25c4581b8bc2b62a99a4afead3edb8ae724d1d620","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:07:46.699041Z","signature_b64":"YrMctq2vtEL40Hno6YCGklJeir8b1NVUeNf/apfeHiu0qDC9sPrzW+9mhdhEYU+IlW/xlHQ+ymtXFw1rc/7bDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bc1642f9d81918329fc9c7e25c4581b8bc2b62a99a4afead3edb8ae724d1d620","last_reissued_at":"2026-05-18T01:07:46.698606Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:07:46.698606Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0005219","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":"2026-05-18T01:07:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QytJWvPftNMtfpHoSuIa86GX9o3iwZHu/LggH/5krrAnzqXR104q5CGL+mj3onwCNASUr9v3eOwvIm3sq+SnDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-18T17:58:41.907749Z"},"content_sha256":"a0e6ffec488813a5d47f3f8dac9fa2102f2412627bcfdc23db8f6d55172f10f0","schema_version":"1.0","event_id":"sha256:a0e6ffec488813a5d47f3f8dac9fa2102f2412627bcfdc23db8f6d55172f10f0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2000:XQLEF6OYDEMDFH6JY7RFYRMBXC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The X-ray spectra of Compton-thick Seyfert 2 galaxies as seen by BeppoSAX","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A.C. Fabian, G. Malaguti, G. Matt, K. Iwasawa, L. Bassani, M. Guainazzi","submitted_at":"2000-05-10T11:27:13Z","abstract_excerpt":"Results from BeppoSAX observations of Compton--thick Seyfert 2 galaxies are summarized and reviewed, and their general properties derived and discussed. In five out of the seven observed sources, the nucleus is directly visible at high X-ray energies, where the photons penetrate absorbers with column densities in the range 1.1-4.3x10^{24} cm-2 (in the other two sources, NGC 1068 and NGC 7674, the nucleus is instead totally obscured at all energies, implying even larger column densities). In most sources there is unambiguous evidence of a reflection component from optically thick, cold matter, "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0005219","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":"2026-05-18T01:07:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"98LHWcc+Z9sWi8lVSDJtVGY3U9FLhnGTzEcSG5UkGNjJeaPuC3orV+m32H9vvAxaL1SQ6hvPcs2C8IUhGEz1Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-18T17:58:41.908126Z"},"content_sha256":"3b4af294eec59acd3f4eb5e7f5e006017b3d399fd764f91acbde0ee256ac634f","schema_version":"1.0","event_id":"sha256:3b4af294eec59acd3f4eb5e7f5e006017b3d399fd764f91acbde0ee256ac634f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XQLEF6OYDEMDFH6JY7RFYRMBXC/bundle.json","state_url":"https://pith.science/pith/XQLEF6OYDEMDFH6JY7RFYRMBXC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XQLEF6OYDEMDFH6JY7RFYRMBXC/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":"2026-05-18T17:58:41Z","links":{"resolver":"https://pith.science/pith/XQLEF6OYDEMDFH6JY7RFYRMBXC","bundle":"https://pith.science/pith/XQLEF6OYDEMDFH6JY7RFYRMBXC/bundle.json","state":"https://pith.science/pith/XQLEF6OYDEMDFH6JY7RFYRMBXC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XQLEF6OYDEMDFH6JY7RFYRMBXC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2000:XQLEF6OYDEMDFH6JY7RFYRMBXC","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":"51c2099ee51802b1c758a7c1f1e4fdcc3e714216d4b27bef34b923e39aadeb3f","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2000-05-10T11:27:13Z","title_canon_sha256":"825139a972b36e7f81ef545612a415e6fefea6ede6a3c60ddc2c905db4008fd4"},"schema_version":"1.0","source":{"id":"astro-ph/0005219","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0005219","created_at":"2026-05-18T01:07:46Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0005219v1","created_at":"2026-05-18T01:07:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0005219","created_at":"2026-05-18T01:07:46Z"},{"alias_kind":"pith_short_12","alias_value":"XQLEF6OYDEMD","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"XQLEF6OYDEMDFH6J","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"XQLEF6OY","created_at":"2026-05-18T12:25:50Z"}],"graph_snapshots":[{"event_id":"sha256:3b4af294eec59acd3f4eb5e7f5e006017b3d399fd764f91acbde0ee256ac634f","target":"graph","created_at":"2026-05-18T01:07:46Z","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":"Results from BeppoSAX observations of Compton--thick Seyfert 2 galaxies are summarized and reviewed, and their general properties derived and discussed. In five out of the seven observed sources, the nucleus is directly visible at high X-ray energies, where the photons penetrate absorbers with column densities in the range 1.1-4.3x10^{24} cm-2 (in the other two sources, NGC 1068 and NGC 7674, the nucleus is instead totally obscured at all energies, implying even larger column densities). In most sources there is unambiguous evidence of a reflection component from optically thick, cold matter, ","authors_text":"A.C. Fabian, G. Malaguti, G. Matt, K. Iwasawa, L. Bassani, M. Guainazzi","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2000-05-10T11:27:13Z","title":"The X-ray spectra of Compton-thick Seyfert 2 galaxies as seen by BeppoSAX"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0005219","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:a0e6ffec488813a5d47f3f8dac9fa2102f2412627bcfdc23db8f6d55172f10f0","target":"record","created_at":"2026-05-18T01:07:46Z","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":"51c2099ee51802b1c758a7c1f1e4fdcc3e714216d4b27bef34b923e39aadeb3f","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2000-05-10T11:27:13Z","title_canon_sha256":"825139a972b36e7f81ef545612a415e6fefea6ede6a3c60ddc2c905db4008fd4"},"schema_version":"1.0","source":{"id":"astro-ph/0005219","kind":"arxiv","version":1}},"canonical_sha256":"bc1642f9d81918329fc9c7e25c4581b8bc2b62a99a4afead3edb8ae724d1d620","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bc1642f9d81918329fc9c7e25c4581b8bc2b62a99a4afead3edb8ae724d1d620","first_computed_at":"2026-05-18T01:07:46.698606Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:07:46.698606Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"YrMctq2vtEL40Hno6YCGklJeir8b1NVUeNf/apfeHiu0qDC9sPrzW+9mhdhEYU+IlW/xlHQ+ymtXFw1rc/7bDw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:07:46.699041Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0005219","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a0e6ffec488813a5d47f3f8dac9fa2102f2412627bcfdc23db8f6d55172f10f0","sha256:3b4af294eec59acd3f4eb5e7f5e006017b3d399fd764f91acbde0ee256ac634f"],"state_sha256":"3eab8a1c0e48f52c83dc25ee0d2cfe05f82bcf90bac96b37ba4294c3b1b42eae"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kwRLBEeLCIEyQonRztk6BxIJTlIsOAi13B3Vf+rzuZdOR5V+AxhF0ud2Sfccngrgpuc6ae6MYaNcuTWt1vGwCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-18T17:58:41.909645Z","bundle_sha256":"910e70095b253badfd800e9c2bfc0178fcc25bc88fcef159445ac63c43fe4bb1"}}