{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2017:CP3R6EEIT6FL7H4WWMSLZEUKND","short_pith_number":"pith:CP3R6EEI","schema_version":"1.0","canonical_sha256":"13f71f10889f8abf9f96b324bc928a68c9a988097414d89a4136a59d80b9ca1c","source":{"kind":"arxiv","id":"1705.10799","version":1},"attestation_state":"computed","paper":{"title":"Enhancement of AGN in a protocluster at z=1.6","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Charutha Krishnan, Chris Simpson, Dale Kocevski, David T. Maltby, Elizabeth A. Cooke, Guenther Hasinger, Nina A. Hatch, Omar Almaini, Stuart I. Muldrew, William G. Hartley","submitted_at":"2017-05-30T18:00:31Z","abstract_excerpt":"We investigate the prevalence of AGN in the high-redshift protocluster $\\rm{Cl}\\,0218.3$-$0510$ at $z=1.62$. Using imaging from the Chandra X-ray Telescope, we find a large overdensity of AGN in the protocluster; a factor of $23\\pm9$ times the field density of AGN. Only half of this AGN overdensity is due to the overdensity of massive galaxies in the protocluster (a factor of $11\\pm2$), as we find that $17^{+6}_{-5}\\%$ of massive galaxies ($M_* > 10^{10}\\,\\rm{M}_{\\odot}$) in the protocluster host an X-ray luminous AGN, compared to $8\\pm1\\%$ in the field. This corresponds to an enhancement of A"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1705.10799","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-05-30T18:00:31Z","cross_cats_sorted":[],"title_canon_sha256":"024d367ba4a5fe975c6d9d7fac04c545c23c9d4e79c5a750ae22b4fc91265c9a","abstract_canon_sha256":"495982e8959a03543ea5a372a5a5a855e9a482a4222b81821fbbbef241f854fd"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:39:34.556612Z","signature_b64":"X7W3w2NdePdBe3JpxuVI21i9AWW3a65uEZyj+RO7eZ8zap9VANzZ+k50+AON3E3O3iKkljPozF3J+AbUrij3Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"13f71f10889f8abf9f96b324bc928a68c9a988097414d89a4136a59d80b9ca1c","last_reissued_at":"2026-05-18T00:39:34.555823Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:39:34.555823Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Enhancement of AGN in a protocluster at z=1.6","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Charutha Krishnan, Chris Simpson, Dale Kocevski, David T. Maltby, Elizabeth A. Cooke, Guenther Hasinger, Nina A. Hatch, Omar Almaini, Stuart I. Muldrew, William G. Hartley","submitted_at":"2017-05-30T18:00:31Z","abstract_excerpt":"We investigate the prevalence of AGN in the high-redshift protocluster $\\rm{Cl}\\,0218.3$-$0510$ at $z=1.62$. Using imaging from the Chandra X-ray Telescope, we find a large overdensity of AGN in the protocluster; a factor of $23\\pm9$ times the field density of AGN. Only half of this AGN overdensity is due to the overdensity of massive galaxies in the protocluster (a factor of $11\\pm2$), as we find that $17^{+6}_{-5}\\%$ of massive galaxies ($M_* > 10^{10}\\,\\rm{M}_{\\odot}$) in the protocluster host an X-ray luminous AGN, compared to $8\\pm1\\%$ in the field. This corresponds to an enhancement of A"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1705.10799","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1705.10799","created_at":"2026-05-18T00:39:34.555966+00:00"},{"alias_kind":"arxiv_version","alias_value":"1705.10799v1","created_at":"2026-05-18T00:39:34.555966+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1705.10799","created_at":"2026-05-18T00:39:34.555966+00:00"},{"alias_kind":"pith_short_12","alias_value":"CP3R6EEIT6FL","created_at":"2026-05-18T12:31:10.602751+00:00"},{"alias_kind":"pith_short_16","alias_value":"CP3R6EEIT6FL7H4W","created_at":"2026-05-18T12:31:10.602751+00:00"},{"alias_kind":"pith_short_8","alias_value":"CP3R6EEI","created_at":"2026-05-18T12:31:10.602751+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/CP3R6EEIT6FL7H4WWMSLZEUKND","json":"https://pith.science/pith/CP3R6EEIT6FL7H4WWMSLZEUKND.json","graph_json":"https://pith.science/api/pith-number/CP3R6EEIT6FL7H4WWMSLZEUKND/graph.json","events_json":"https://pith.science/api/pith-number/CP3R6EEIT6FL7H4WWMSLZEUKND/events.json","paper":"https://pith.science/paper/CP3R6EEI"},"agent_actions":{"view_html":"https://pith.science/pith/CP3R6EEIT6FL7H4WWMSLZEUKND","download_json":"https://pith.science/pith/CP3R6EEIT6FL7H4WWMSLZEUKND.json","view_paper":"https://pith.science/paper/CP3R6EEI","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1705.10799&json=true","fetch_graph":"https://pith.science/api/pith-number/CP3R6EEIT6FL7H4WWMSLZEUKND/graph.json","fetch_events":"https://pith.science/api/pith-number/CP3R6EEIT6FL7H4WWMSLZEUKND/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/CP3R6EEIT6FL7H4WWMSLZEUKND/action/timestamp_anchor","attest_storage":"https://pith.science/pith/CP3R6EEIT6FL7H4WWMSLZEUKND/action/storage_attestation","attest_author":"https://pith.science/pith/CP3R6EEIT6FL7H4WWMSLZEUKND/action/author_attestation","sign_citation":"https://pith.science/pith/CP3R6EEIT6FL7H4WWMSLZEUKND/action/citation_signature","submit_replication":"https://pith.science/pith/CP3R6EEIT6FL7H4WWMSLZEUKND/action/replication_record"}},"created_at":"2026-05-18T00:39:34.555966+00:00","updated_at":"2026-05-18T00:39:34.555966+00:00"}