{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:MV5FLNBDDZYHGWKJ2GSIHQJG6R","short_pith_number":"pith:MV5FLNBD","canonical_record":{"source":{"id":"1810.11925","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-10-29T02:35:06Z","cross_cats_sorted":[],"title_canon_sha256":"7a6a074dbf64d34331d41e485b0c856c91665ad6eeb89b8fa06bd91e6bae2023","abstract_canon_sha256":"cd718b82dae369730f76e74ad0ad19c69a544137b9ff23e6a539dcafb7369bea"},"schema_version":"1.0"},"canonical_sha256":"657a55b4231e70735949d1a483c126f455b6deb80252f2eb14401553396792d2","source":{"kind":"arxiv","id":"1810.11925","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.11925","created_at":"2026-05-17T23:58:36Z"},{"alias_kind":"arxiv_version","alias_value":"1810.11925v2","created_at":"2026-05-17T23:58:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.11925","created_at":"2026-05-17T23:58:36Z"},{"alias_kind":"pith_short_12","alias_value":"MV5FLNBDDZYH","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_16","alias_value":"MV5FLNBDDZYHGWKJ","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_8","alias_value":"MV5FLNBD","created_at":"2026-05-18T12:32:40Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:MV5FLNBDDZYHGWKJ2GSIHQJG6R","target":"record","payload":{"canonical_record":{"source":{"id":"1810.11925","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-10-29T02:35:06Z","cross_cats_sorted":[],"title_canon_sha256":"7a6a074dbf64d34331d41e485b0c856c91665ad6eeb89b8fa06bd91e6bae2023","abstract_canon_sha256":"cd718b82dae369730f76e74ad0ad19c69a544137b9ff23e6a539dcafb7369bea"},"schema_version":"1.0"},"canonical_sha256":"657a55b4231e70735949d1a483c126f455b6deb80252f2eb14401553396792d2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:58:36.817829Z","signature_b64":"xGZ3cENDiW/pdFunFp2C1VvpFuT251Whl0dM7RmDiv+8E++tOjp6zrBQ8fYoDKngQatmjkOlnsPCaXHOAPLhDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"657a55b4231e70735949d1a483c126f455b6deb80252f2eb14401553396792d2","last_reissued_at":"2026-05-17T23:58:36.817187Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:58:36.817187Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1810.11925","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:58:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sMwqbFIlKpjpIKKza9v2MBeiBBM2l3KUb+Jb3Ib0oi/V9ClR0EMcqzQCxJzolOYnHMXvZ8fZ36t9D7IBN4ZUCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T09:48:18.786533Z"},"content_sha256":"558c7f4cfe21f595d297b5ae013bd559b3a90290c648c62fbe6bf30394e10f53","schema_version":"1.0","event_id":"sha256:558c7f4cfe21f595d297b5ae013bd559b3a90290c648c62fbe6bf30394e10f53"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:MV5FLNBDDZYHGWKJ2GSIHQJG6R","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Discovery of A Luminous Broad Absorption Line Quasar at A Redshift of 7.02","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Bram Venemans, Chiara Mazzucchelli, Eduardo Ba\\~nados, Emanuele P. Farina, Fabian Walter, Feige Wang, Frederick B. Davies, Fuyan Bian, Ian D. McGreer, Jan-Torge Schindler, Jiang-Tao Li, Jinyi Yang, Joseph F. Hennawi, Linhua Jiang, Minghao Yue, Richard Green, Roberto Decarli, Xiaohui Fan, Xue-Bing Wu, Yun-Hsin Huang, Yuri Beletsky","submitted_at":"2018-10-29T02:35:06Z","abstract_excerpt":"Despite extensive efforts, only two quasars have been found at $z>7$ to date due to a combination of low spatial density and high contamination from more ubiquitous Galactic cool dwarfs in quasar selection. This limits our current knowledge of the super-massive black hole (SMBH) growth mechanism and reionization history. In this letter, we report the discovery of a luminous quasar at $z=7.021$, DELS J003836.10$-$152723.6 (hereafter J0038$-$1527), selected using photometric data from DESI Legacy imaging Survey (DELS), Pan-STARRS1 (PS1) imaging Survey, as well as Wide-field Infrared Survey Explo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.11925","kind":"arxiv","version":2},"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":"2026-05-17T23:58:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jl7GZWdEIza/aftQZmILpZ1Ldf763132vSKYBznCGlzLVGOOYbR+/J92MD64l1e8NcUVFqVh47Xzybl6E6CaDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T09:48:18.787070Z"},"content_sha256":"ad1097480e5ddfdf31c1615f3df02e8cd570485827d298c145e70f97a7905630","schema_version":"1.0","event_id":"sha256:ad1097480e5ddfdf31c1615f3df02e8cd570485827d298c145e70f97a7905630"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MV5FLNBDDZYHGWKJ2GSIHQJG6R/bundle.json","state_url":"https://pith.science/pith/MV5FLNBDDZYHGWKJ2GSIHQJG6R/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MV5FLNBDDZYHGWKJ2GSIHQJG6R/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":"2026-06-27T09:48:18Z","links":{"resolver":"https://pith.science/pith/MV5FLNBDDZYHGWKJ2GSIHQJG6R","bundle":"https://pith.science/pith/MV5FLNBDDZYHGWKJ2GSIHQJG6R/bundle.json","state":"https://pith.science/pith/MV5FLNBDDZYHGWKJ2GSIHQJG6R/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MV5FLNBDDZYHGWKJ2GSIHQJG6R/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:MV5FLNBDDZYHGWKJ2GSIHQJG6R","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":"cd718b82dae369730f76e74ad0ad19c69a544137b9ff23e6a539dcafb7369bea","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-10-29T02:35:06Z","title_canon_sha256":"7a6a074dbf64d34331d41e485b0c856c91665ad6eeb89b8fa06bd91e6bae2023"},"schema_version":"1.0","source":{"id":"1810.11925","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.11925","created_at":"2026-05-17T23:58:36Z"},{"alias_kind":"arxiv_version","alias_value":"1810.11925v2","created_at":"2026-05-17T23:58:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.11925","created_at":"2026-05-17T23:58:36Z"},{"alias_kind":"pith_short_12","alias_value":"MV5FLNBDDZYH","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_16","alias_value":"MV5FLNBDDZYHGWKJ","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_8","alias_value":"MV5FLNBD","created_at":"2026-05-18T12:32:40Z"}],"graph_snapshots":[{"event_id":"sha256:ad1097480e5ddfdf31c1615f3df02e8cd570485827d298c145e70f97a7905630","target":"graph","created_at":"2026-05-17T23:58:36Z","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":"Despite extensive efforts, only two quasars have been found at $z>7$ to date due to a combination of low spatial density and high contamination from more ubiquitous Galactic cool dwarfs in quasar selection. This limits our current knowledge of the super-massive black hole (SMBH) growth mechanism and reionization history. In this letter, we report the discovery of a luminous quasar at $z=7.021$, DELS J003836.10$-$152723.6 (hereafter J0038$-$1527), selected using photometric data from DESI Legacy imaging Survey (DELS), Pan-STARRS1 (PS1) imaging Survey, as well as Wide-field Infrared Survey Explo","authors_text":"Bram Venemans, Chiara Mazzucchelli, Eduardo Ba\\~nados, Emanuele P. Farina, Fabian Walter, Feige Wang, Frederick B. Davies, Fuyan Bian, Ian D. McGreer, Jan-Torge Schindler, Jiang-Tao Li, Jinyi Yang, Joseph F. Hennawi, Linhua Jiang, Minghao Yue, Richard Green, Roberto Decarli, Xiaohui Fan, Xue-Bing Wu, Yun-Hsin Huang, Yuri Beletsky","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-10-29T02:35:06Z","title":"The Discovery of A Luminous Broad Absorption Line Quasar at A Redshift of 7.02"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.11925","kind":"arxiv","version":2},"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":"sha256:558c7f4cfe21f595d297b5ae013bd559b3a90290c648c62fbe6bf30394e10f53","target":"record","created_at":"2026-05-17T23:58:36Z","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":"cd718b82dae369730f76e74ad0ad19c69a544137b9ff23e6a539dcafb7369bea","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-10-29T02:35:06Z","title_canon_sha256":"7a6a074dbf64d34331d41e485b0c856c91665ad6eeb89b8fa06bd91e6bae2023"},"schema_version":"1.0","source":{"id":"1810.11925","kind":"arxiv","version":2}},"canonical_sha256":"657a55b4231e70735949d1a483c126f455b6deb80252f2eb14401553396792d2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"657a55b4231e70735949d1a483c126f455b6deb80252f2eb14401553396792d2","first_computed_at":"2026-05-17T23:58:36.817187Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:58:36.817187Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xGZ3cENDiW/pdFunFp2C1VvpFuT251Whl0dM7RmDiv+8E++tOjp6zrBQ8fYoDKngQatmjkOlnsPCaXHOAPLhDQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:58:36.817829Z","signed_message":"canonical_sha256_bytes"},"source_id":"1810.11925","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:558c7f4cfe21f595d297b5ae013bd559b3a90290c648c62fbe6bf30394e10f53","sha256:ad1097480e5ddfdf31c1615f3df02e8cd570485827d298c145e70f97a7905630"],"state_sha256":"6103e1a422bb191ec1e8bec9f99847fba0dfe9f1612828b1a2a3c68ea0197053"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4XBCwvPy+EZ4WQE62cpc7OMUhLaZ9USRVWQPrUAS7lsnPHPuord0OFVi5j6quImvV45nPrqORE6/l954K2oMBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-27T09:48:18.789693Z","bundle_sha256":"fa74fc5875aa2a0212531bdfafca123a81bfdce5fc326a62e841cac36603f84b"}}