{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:GFTZU2CVEZ5QQP2EWVLZEREXAY","short_pith_number":"pith:GFTZU2CV","canonical_record":{"source":{"id":"1505.01153","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-05-05T20:00:32Z","cross_cats_sorted":[],"title_canon_sha256":"a00e9069f62dede6b9f66fd1ce9eb7e7effd482e8f41990abf5ee6646e56341f","abstract_canon_sha256":"5bb5a0c0a302391b66fdcdf49764146eea130e0111c6c5bb3a35912b9ad38100"},"schema_version":"1.0"},"canonical_sha256":"31679a6855267b083f44b5579244970639d3704ec0b6e6f2339b373b63a28863","source":{"kind":"arxiv","id":"1505.01153","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.01153","created_at":"2026-05-18T02:16:50Z"},{"alias_kind":"arxiv_version","alias_value":"1505.01153v1","created_at":"2026-05-18T02:16:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.01153","created_at":"2026-05-18T02:16:50Z"},{"alias_kind":"pith_short_12","alias_value":"GFTZU2CVEZ5Q","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_16","alias_value":"GFTZU2CVEZ5QQP2E","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_8","alias_value":"GFTZU2CV","created_at":"2026-05-18T12:29:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:GFTZU2CVEZ5QQP2EWVLZEREXAY","target":"record","payload":{"canonical_record":{"source":{"id":"1505.01153","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-05-05T20:00:32Z","cross_cats_sorted":[],"title_canon_sha256":"a00e9069f62dede6b9f66fd1ce9eb7e7effd482e8f41990abf5ee6646e56341f","abstract_canon_sha256":"5bb5a0c0a302391b66fdcdf49764146eea130e0111c6c5bb3a35912b9ad38100"},"schema_version":"1.0"},"canonical_sha256":"31679a6855267b083f44b5579244970639d3704ec0b6e6f2339b373b63a28863","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:16:50.453131Z","signature_b64":"5Ip4ntNSCPAg8bDjrb3GUyhWgREOffSM4CdZz3XUGUaCDLrXxR+vcuL31SFBhfA+57lRuVaAy57Bm1qQf+joDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"31679a6855267b083f44b5579244970639d3704ec0b6e6f2339b373b63a28863","last_reissued_at":"2026-05-18T02:16:50.452200Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:16:50.452200Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1505.01153","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":"2026-05-18T02:16:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"woecTj2mCZDky7q1mpT4R+UvxNOlsHc/ZXkL9NzkJ1hP/MPLsPmFhtksM8UI9PD3wCQ6CdNzk48rqK6MB+bXDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T21:32:14.309964Z"},"content_sha256":"39dd6495c5b66ead68f02b15dd58f5cc0322716ff0825456e6c83b5510091299","schema_version":"1.0","event_id":"sha256:39dd6495c5b66ead68f02b15dd58f5cc0322716ff0825456e6c83b5510091299"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:GFTZU2CVEZ5QQP2EWVLZEREXAY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The most obscured AGN in the COSMOS field","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. Comastri, C. Gruppioni, C. Vignali, F. Pozzi, G. Lanzuisi, G. Vietri, G. Zamorani, I. Delvecchio, M. Brusa, M. Mignoli, M. Perna, N. Cappelluti, R. Gilli, S. Berta","submitted_at":"2015-05-05T20:00:32Z","abstract_excerpt":"Highly obscured active galactic nuclei (AGN) are common in nearby galaxies, but are difficult to observe beyond the local Universe, where they are expected to significantly contribute to the black hole accretion rate density. Furthermore, Compton-thick (CT) absorbers (NH>10^24 cm^-2) suppress even the hard X-ray (2-10 keV) AGN nuclear emission, and therefore the column density distribution above 10^24 cm^-2 is largely unknown. We present the identification and multi-wavelength properties of a heavily obscured (NH>~10^25 cm^-2), intrinsically luminous (L(2-10keV)>10^44 erg s^-1) AGN at z=0.353 "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.01153","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":"2026-05-18T02:16:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+/9A2d0vVIgNQc+8YB9D0xeyjZm6hrIBszWq52ZM8CTvCJxvT4rympidgAhYEUwT2HJdP5K1IDtz1mC7d4qGBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T21:32:14.310555Z"},"content_sha256":"f4e2f9fc1bde78b82a9c8a13d2a79155d960e6a0f83a213cde6354d6897d446b","schema_version":"1.0","event_id":"sha256:f4e2f9fc1bde78b82a9c8a13d2a79155d960e6a0f83a213cde6354d6897d446b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GFTZU2CVEZ5QQP2EWVLZEREXAY/bundle.json","state_url":"https://pith.science/pith/GFTZU2CVEZ5QQP2EWVLZEREXAY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GFTZU2CVEZ5QQP2EWVLZEREXAY/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":"2026-05-20T21:32:14Z","links":{"resolver":"https://pith.science/pith/GFTZU2CVEZ5QQP2EWVLZEREXAY","bundle":"https://pith.science/pith/GFTZU2CVEZ5QQP2EWVLZEREXAY/bundle.json","state":"https://pith.science/pith/GFTZU2CVEZ5QQP2EWVLZEREXAY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GFTZU2CVEZ5QQP2EWVLZEREXAY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:GFTZU2CVEZ5QQP2EWVLZEREXAY","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":"5bb5a0c0a302391b66fdcdf49764146eea130e0111c6c5bb3a35912b9ad38100","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-05-05T20:00:32Z","title_canon_sha256":"a00e9069f62dede6b9f66fd1ce9eb7e7effd482e8f41990abf5ee6646e56341f"},"schema_version":"1.0","source":{"id":"1505.01153","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.01153","created_at":"2026-05-18T02:16:50Z"},{"alias_kind":"arxiv_version","alias_value":"1505.01153v1","created_at":"2026-05-18T02:16:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.01153","created_at":"2026-05-18T02:16:50Z"},{"alias_kind":"pith_short_12","alias_value":"GFTZU2CVEZ5Q","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_16","alias_value":"GFTZU2CVEZ5QQP2E","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_8","alias_value":"GFTZU2CV","created_at":"2026-05-18T12:29:22Z"}],"graph_snapshots":[{"event_id":"sha256:f4e2f9fc1bde78b82a9c8a13d2a79155d960e6a0f83a213cde6354d6897d446b","target":"graph","created_at":"2026-05-18T02:16:50Z","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":"Highly obscured active galactic nuclei (AGN) are common in nearby galaxies, but are difficult to observe beyond the local Universe, where they are expected to significantly contribute to the black hole accretion rate density. Furthermore, Compton-thick (CT) absorbers (NH>10^24 cm^-2) suppress even the hard X-ray (2-10 keV) AGN nuclear emission, and therefore the column density distribution above 10^24 cm^-2 is largely unknown. We present the identification and multi-wavelength properties of a heavily obscured (NH>~10^25 cm^-2), intrinsically luminous (L(2-10keV)>10^44 erg s^-1) AGN at z=0.353 ","authors_text":"A. Comastri, C. Gruppioni, C. Vignali, F. Pozzi, G. Lanzuisi, G. Vietri, G. Zamorani, I. Delvecchio, M. Brusa, M. Mignoli, M. Perna, N. Cappelluti, R. Gilli, S. Berta","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-05-05T20:00:32Z","title":"The most obscured AGN in the COSMOS field"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.01153","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":"sha256:39dd6495c5b66ead68f02b15dd58f5cc0322716ff0825456e6c83b5510091299","target":"record","created_at":"2026-05-18T02:16:50Z","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":"5bb5a0c0a302391b66fdcdf49764146eea130e0111c6c5bb3a35912b9ad38100","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-05-05T20:00:32Z","title_canon_sha256":"a00e9069f62dede6b9f66fd1ce9eb7e7effd482e8f41990abf5ee6646e56341f"},"schema_version":"1.0","source":{"id":"1505.01153","kind":"arxiv","version":1}},"canonical_sha256":"31679a6855267b083f44b5579244970639d3704ec0b6e6f2339b373b63a28863","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"31679a6855267b083f44b5579244970639d3704ec0b6e6f2339b373b63a28863","first_computed_at":"2026-05-18T02:16:50.452200Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:16:50.452200Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5Ip4ntNSCPAg8bDjrb3GUyhWgREOffSM4CdZz3XUGUaCDLrXxR+vcuL31SFBhfA+57lRuVaAy57Bm1qQf+joDw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:16:50.453131Z","signed_message":"canonical_sha256_bytes"},"source_id":"1505.01153","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:39dd6495c5b66ead68f02b15dd58f5cc0322716ff0825456e6c83b5510091299","sha256:f4e2f9fc1bde78b82a9c8a13d2a79155d960e6a0f83a213cde6354d6897d446b"],"state_sha256":"4ad71476e6bdfa8447f96a47afe2c6709cdd609fb14061986409bc25cd8372ed"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6Cg+0CdS4tgo5uHZngfvwe8KATOETy+m29MSkniPdO5A4+8h5YFL+EOZrMolx7I8zm7FXe5lzghCy1Wn1QRVAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-20T21:32:14.314176Z","bundle_sha256":"0fdfdf043c358e14a9a652917a595b5f50be5b275634d6b8ddffb188d25ddc32"}}