{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:MU65TRXXAZG2X227KLW2MDZLXC","short_pith_number":"pith:MU65TRXX","canonical_record":{"source":{"id":"1207.4882","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-07-20T09:11:31Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"9502842b8115f267542225b0d708f04f6931276d6fbbf01f6093b81d55f21fc5","abstract_canon_sha256":"1139ed5c70cac48c15a3546fe52ad072da92110000373a5c72655c73429b020a"},"schema_version":"1.0"},"canonical_sha256":"653dd9c6f7064dabeb5f52eda60f2bb8891c4c635e5629f47896ddc82e0b9137","source":{"kind":"arxiv","id":"1207.4882","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1207.4882","created_at":"2026-05-18T01:56:15Z"},{"alias_kind":"arxiv_version","alias_value":"1207.4882v1","created_at":"2026-05-18T01:56:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1207.4882","created_at":"2026-05-18T01:56:15Z"},{"alias_kind":"pith_short_12","alias_value":"MU65TRXXAZG2","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_16","alias_value":"MU65TRXXAZG2X227","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_8","alias_value":"MU65TRXX","created_at":"2026-05-18T12:27:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:MU65TRXXAZG2X227KLW2MDZLXC","target":"record","payload":{"canonical_record":{"source":{"id":"1207.4882","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-07-20T09:11:31Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"9502842b8115f267542225b0d708f04f6931276d6fbbf01f6093b81d55f21fc5","abstract_canon_sha256":"1139ed5c70cac48c15a3546fe52ad072da92110000373a5c72655c73429b020a"},"schema_version":"1.0"},"canonical_sha256":"653dd9c6f7064dabeb5f52eda60f2bb8891c4c635e5629f47896ddc82e0b9137","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:56:15.866009Z","signature_b64":"zcKTjxtyC0pCktsBigEkrvURSTiQCtlQav7vlcBrrTugE2EO0vLvWRgFF9qA5oNVjnxoPtQ/KezNKGkoHqsmCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"653dd9c6f7064dabeb5f52eda60f2bb8891c4c635e5629f47896ddc82e0b9137","last_reissued_at":"2026-05-18T01:56:15.865297Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:56:15.865297Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1207.4882","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":"2026-05-18T01:56:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NhxMMr38Ce4EMymHmVq0CpW8mkqU142ioL2I7LZLLzPA8GYyXSf3aHWstlKEARI06tiKprlRtDe7N1XhTBprAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T22:46:47.629978Z"},"content_sha256":"e728445a28f81e942f08cf8fd85b4126eb117c9e0bc8353f851a2a3f49d41885","schema_version":"1.0","event_id":"sha256:e728445a28f81e942f08cf8fd85b4126eb117c9e0bc8353f851a2a3f49d41885"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:MU65TRXXAZG2X227KLW2MDZLXC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The INTEGRAL/IBIS AGN catalogue I: X-ray absorption properties versus optical classification","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.HE","authors_text":"A. Bazzano, A. J. Bird, A. Malizia, F. Panessa, J. B. Stephen, L. Bassani, N. Masetti, P. Ubertini","submitted_at":"2012-07-20T09:11:31Z","abstract_excerpt":"In this work we present the most comprehensive INTEGRAL AGN sample which lists 272 objects. Here we mainly use this sample to study the absorption properties of active galaxies, to probe new AGN classes and to test the AGN unification scheme. We find that half (48%) of the sample is absorbed while the fraction of Compton thick AGN is small (~7%). In line with our previous analysis, we have however shown that when the bias towards heavily absorbed objects which are lost if weak and at large distance is removed, as it is possible in the local Universe, the above fractions increase to become 80% "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1207.4882","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":"2026-05-18T01:56:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"u1tbfHELCN5yW4T2VKDbUpNCe8miJ9+gfBM3SXKrpvmC5e4ActxUp5YnCzFzmcrMofjTmodo3PRtVWRaAO5zDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T22:46:47.630700Z"},"content_sha256":"c43e3c17e438abd7bc74acfc78051e755c7878080f0efa8b57bc373be912aac4","schema_version":"1.0","event_id":"sha256:c43e3c17e438abd7bc74acfc78051e755c7878080f0efa8b57bc373be912aac4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MU65TRXXAZG2X227KLW2MDZLXC/bundle.json","state_url":"https://pith.science/pith/MU65TRXXAZG2X227KLW2MDZLXC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MU65TRXXAZG2X227KLW2MDZLXC/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":"2026-05-27T22:46:47Z","links":{"resolver":"https://pith.science/pith/MU65TRXXAZG2X227KLW2MDZLXC","bundle":"https://pith.science/pith/MU65TRXXAZG2X227KLW2MDZLXC/bundle.json","state":"https://pith.science/pith/MU65TRXXAZG2X227KLW2MDZLXC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MU65TRXXAZG2X227KLW2MDZLXC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:MU65TRXXAZG2X227KLW2MDZLXC","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":"1139ed5c70cac48c15a3546fe52ad072da92110000373a5c72655c73429b020a","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-07-20T09:11:31Z","title_canon_sha256":"9502842b8115f267542225b0d708f04f6931276d6fbbf01f6093b81d55f21fc5"},"schema_version":"1.0","source":{"id":"1207.4882","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1207.4882","created_at":"2026-05-18T01:56:15Z"},{"alias_kind":"arxiv_version","alias_value":"1207.4882v1","created_at":"2026-05-18T01:56:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1207.4882","created_at":"2026-05-18T01:56:15Z"},{"alias_kind":"pith_short_12","alias_value":"MU65TRXXAZG2","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_16","alias_value":"MU65TRXXAZG2X227","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_8","alias_value":"MU65TRXX","created_at":"2026-05-18T12:27:14Z"}],"graph_snapshots":[{"event_id":"sha256:c43e3c17e438abd7bc74acfc78051e755c7878080f0efa8b57bc373be912aac4","target":"graph","created_at":"2026-05-18T01:56:15Z","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":"In this work we present the most comprehensive INTEGRAL AGN sample which lists 272 objects. Here we mainly use this sample to study the absorption properties of active galaxies, to probe new AGN classes and to test the AGN unification scheme. We find that half (48%) of the sample is absorbed while the fraction of Compton thick AGN is small (~7%). In line with our previous analysis, we have however shown that when the bias towards heavily absorbed objects which are lost if weak and at large distance is removed, as it is possible in the local Universe, the above fractions increase to become 80% ","authors_text":"A. Bazzano, A. J. Bird, A. Malizia, F. Panessa, J. B. Stephen, L. Bassani, N. Masetti, P. Ubertini","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-07-20T09:11:31Z","title":"The INTEGRAL/IBIS AGN catalogue I: X-ray absorption properties versus optical classification"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1207.4882","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:e728445a28f81e942f08cf8fd85b4126eb117c9e0bc8353f851a2a3f49d41885","target":"record","created_at":"2026-05-18T01:56:15Z","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":"1139ed5c70cac48c15a3546fe52ad072da92110000373a5c72655c73429b020a","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-07-20T09:11:31Z","title_canon_sha256":"9502842b8115f267542225b0d708f04f6931276d6fbbf01f6093b81d55f21fc5"},"schema_version":"1.0","source":{"id":"1207.4882","kind":"arxiv","version":1}},"canonical_sha256":"653dd9c6f7064dabeb5f52eda60f2bb8891c4c635e5629f47896ddc82e0b9137","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"653dd9c6f7064dabeb5f52eda60f2bb8891c4c635e5629f47896ddc82e0b9137","first_computed_at":"2026-05-18T01:56:15.865297Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:56:15.865297Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zcKTjxtyC0pCktsBigEkrvURSTiQCtlQav7vlcBrrTugE2EO0vLvWRgFF9qA5oNVjnxoPtQ/KezNKGkoHqsmCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:56:15.866009Z","signed_message":"canonical_sha256_bytes"},"source_id":"1207.4882","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e728445a28f81e942f08cf8fd85b4126eb117c9e0bc8353f851a2a3f49d41885","sha256:c43e3c17e438abd7bc74acfc78051e755c7878080f0efa8b57bc373be912aac4"],"state_sha256":"685534fa778bb10edb94b6733de9464661da3c22c36a76b19488145ee62e236c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dfXasSXkOV6P9+M5wrE+T+Uk2sfAQAaPcIoijPbmZBAPEmPdQ4Lh4Yzj3x/lnpB4BdDSLJFfrLdgR8phmXiDCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T22:46:47.634558Z","bundle_sha256":"f80c751dd009bfdad0ad7bef5666591ce609a3a29a18088b671dae14650ac316"}}