{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:FZWJ3YN5C4JTFGMHFWHVKHVTHW","short_pith_number":"pith:FZWJ3YN5","canonical_record":{"source":{"id":"1106.1443","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-06-07T20:08:54Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"d851ed57321822979984af7cc0dd7a76b15b4751862643b5403d904fb627a04e","abstract_canon_sha256":"9a395acc20652b50d1c9010c86e85f3b1b3028897b4209d5be45ff41031aa3d4"},"schema_version":"1.0"},"canonical_sha256":"2e6c9de1bd17133299872d8f551eb33da0d5355561a7e5d38371346b347e6068","source":{"kind":"arxiv","id":"1106.1443","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1106.1443","created_at":"2026-05-18T02:01:41Z"},{"alias_kind":"arxiv_version","alias_value":"1106.1443v1","created_at":"2026-05-18T02:01:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1106.1443","created_at":"2026-05-18T02:01:41Z"},{"alias_kind":"pith_short_12","alias_value":"FZWJ3YN5C4JT","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_16","alias_value":"FZWJ3YN5C4JTFGMH","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_8","alias_value":"FZWJ3YN5","created_at":"2026-05-18T12:26:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:FZWJ3YN5C4JTFGMHFWHVKHVTHW","target":"record","payload":{"canonical_record":{"source":{"id":"1106.1443","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-06-07T20:08:54Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"d851ed57321822979984af7cc0dd7a76b15b4751862643b5403d904fb627a04e","abstract_canon_sha256":"9a395acc20652b50d1c9010c86e85f3b1b3028897b4209d5be45ff41031aa3d4"},"schema_version":"1.0"},"canonical_sha256":"2e6c9de1bd17133299872d8f551eb33da0d5355561a7e5d38371346b347e6068","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:01:41.020789Z","signature_b64":"1Ww0P6DaWbcu8o+xNy1cDCKmgj98oudPq+wxjvbW2VTXVyfxYUpTXrNmVPLWl+28/NWfwCfZ3i2AkR17PjKVBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2e6c9de1bd17133299872d8f551eb33da0d5355561a7e5d38371346b347e6068","last_reissued_at":"2026-05-18T02:01:41.020214Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:01:41.020214Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1106.1443","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":"2026-05-18T02:01:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3MM2sPEFQrY7ClMx8ozFM7ExtsEL4UpOIiHYCCi78iRZ+NYbqikvcNTsWZG+axDZcl/EhIKOrxuFAdXsXqNJBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T16:40:53.454767Z"},"content_sha256":"8e39ea16914c1c78e446151bbe3f65cd89d8865ddaae2785da56b9a4ed4e436e","schema_version":"1.0","event_id":"sha256:8e39ea16914c1c78e446151bbe3f65cd89d8865ddaae2785da56b9a4ed4e436e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:FZWJ3YN5C4JTFGMHFWHVKHVTHW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"X-ray Spectral Constraints for z~2 Massive Galaxies: The Identification of Reflection-Dominated Active Galactic Nuclei","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.CO","authors_text":"A.C. Fabian, A. Comastri, A. Del Moro, A.D. Goulding, B.D. Lehmer, B. Luo, C. Vignali, D.A. Rafferty, D.M. Alexander (Durham), D.P. Schneider, E. Daddi, F.E. Bauer, J.R. Mullaney, M. Paolillo, M. Young, O. Shemmer, R.C. Hickox, R. Gilli, V. Mainieri, W.N. Brandt, Y.Q. Xue","submitted_at":"2011-06-07T20:08:54Z","abstract_excerpt":"We use the 4Ms CDF-S survey to place direct X-ray constraints on the ubiquity of z~2 heavily obscured AGNs in K<22 BzK galaxies. Forty seven of the 222 BzK galaxies in the central region of the CDF-S are detected at X-ray energies, 11 of which have hard X-ray spectral slopes (Gamma<1) indicating the presence of heavily obscured AGN activity. The other 36 X-ray detected BzK galaxies appear to be relatively unobscured AGNs and starburst galaxies; we use X-ray variability analyses over a rest-frame baseline of ~3 years to further confirm the presence of AGN activity in many of these systems. The "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1106.1443","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":"2026-05-18T02:01:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/t+md29esnHc3rcTscyQLdWzZW+ChWwxppTNsEyeQssSCWjLDk03Mhh71fSnQC1eqYOOZJNfuyWqPjPKpduHDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T16:40:53.455487Z"},"content_sha256":"7e425714bd4252f6bf9e4ce3e095c701e3befecef47e19c95b1fd51da50ebd84","schema_version":"1.0","event_id":"sha256:7e425714bd4252f6bf9e4ce3e095c701e3befecef47e19c95b1fd51da50ebd84"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FZWJ3YN5C4JTFGMHFWHVKHVTHW/bundle.json","state_url":"https://pith.science/pith/FZWJ3YN5C4JTFGMHFWHVKHVTHW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FZWJ3YN5C4JTFGMHFWHVKHVTHW/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":"2026-05-26T16:40:53Z","links":{"resolver":"https://pith.science/pith/FZWJ3YN5C4JTFGMHFWHVKHVTHW","bundle":"https://pith.science/pith/FZWJ3YN5C4JTFGMHFWHVKHVTHW/bundle.json","state":"https://pith.science/pith/FZWJ3YN5C4JTFGMHFWHVKHVTHW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FZWJ3YN5C4JTFGMHFWHVKHVTHW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:FZWJ3YN5C4JTFGMHFWHVKHVTHW","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":"9a395acc20652b50d1c9010c86e85f3b1b3028897b4209d5be45ff41031aa3d4","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-06-07T20:08:54Z","title_canon_sha256":"d851ed57321822979984af7cc0dd7a76b15b4751862643b5403d904fb627a04e"},"schema_version":"1.0","source":{"id":"1106.1443","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1106.1443","created_at":"2026-05-18T02:01:41Z"},{"alias_kind":"arxiv_version","alias_value":"1106.1443v1","created_at":"2026-05-18T02:01:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1106.1443","created_at":"2026-05-18T02:01:41Z"},{"alias_kind":"pith_short_12","alias_value":"FZWJ3YN5C4JT","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_16","alias_value":"FZWJ3YN5C4JTFGMH","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_8","alias_value":"FZWJ3YN5","created_at":"2026-05-18T12:26:28Z"}],"graph_snapshots":[{"event_id":"sha256:7e425714bd4252f6bf9e4ce3e095c701e3befecef47e19c95b1fd51da50ebd84","target":"graph","created_at":"2026-05-18T02:01:41Z","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":"We use the 4Ms CDF-S survey to place direct X-ray constraints on the ubiquity of z~2 heavily obscured AGNs in K<22 BzK galaxies. Forty seven of the 222 BzK galaxies in the central region of the CDF-S are detected at X-ray energies, 11 of which have hard X-ray spectral slopes (Gamma<1) indicating the presence of heavily obscured AGN activity. The other 36 X-ray detected BzK galaxies appear to be relatively unobscured AGNs and starburst galaxies; we use X-ray variability analyses over a rest-frame baseline of ~3 years to further confirm the presence of AGN activity in many of these systems. The ","authors_text":"A.C. Fabian, A. Comastri, A. Del Moro, A.D. Goulding, B.D. Lehmer, B. Luo, C. Vignali, D.A. Rafferty, D.M. Alexander (Durham), D.P. Schneider, E. Daddi, F.E. Bauer, J.R. Mullaney, M. Paolillo, M. Young, O. Shemmer, R.C. Hickox, R. Gilli, V. Mainieri, W.N. Brandt, Y.Q. Xue","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-06-07T20:08:54Z","title":"X-ray Spectral Constraints for z~2 Massive Galaxies: The Identification of Reflection-Dominated Active Galactic Nuclei"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1106.1443","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":"sha256:8e39ea16914c1c78e446151bbe3f65cd89d8865ddaae2785da56b9a4ed4e436e","target":"record","created_at":"2026-05-18T02:01:41Z","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":"9a395acc20652b50d1c9010c86e85f3b1b3028897b4209d5be45ff41031aa3d4","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-06-07T20:08:54Z","title_canon_sha256":"d851ed57321822979984af7cc0dd7a76b15b4751862643b5403d904fb627a04e"},"schema_version":"1.0","source":{"id":"1106.1443","kind":"arxiv","version":1}},"canonical_sha256":"2e6c9de1bd17133299872d8f551eb33da0d5355561a7e5d38371346b347e6068","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2e6c9de1bd17133299872d8f551eb33da0d5355561a7e5d38371346b347e6068","first_computed_at":"2026-05-18T02:01:41.020214Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:01:41.020214Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1Ww0P6DaWbcu8o+xNy1cDCKmgj98oudPq+wxjvbW2VTXVyfxYUpTXrNmVPLWl+28/NWfwCfZ3i2AkR17PjKVBw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:01:41.020789Z","signed_message":"canonical_sha256_bytes"},"source_id":"1106.1443","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8e39ea16914c1c78e446151bbe3f65cd89d8865ddaae2785da56b9a4ed4e436e","sha256:7e425714bd4252f6bf9e4ce3e095c701e3befecef47e19c95b1fd51da50ebd84"],"state_sha256":"4a2a62295cb860a26277fbbe5d8c6ad84fc023c51c841e268743662555927ae2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4zDtexn8tfuhuzjQ2wizQw4t2PBFNbk4a3OvEDT6Jc6I8Sr8ZkdlCdb01o69fITwneKM06/yzxDE7TbIj67jDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T16:40:53.459338Z","bundle_sha256":"eb6af2e84cdd723078b1b2aef007f9687439e8f49e850b3699cd92f283516670"}}