{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:ZDPNMRRF6GJQ4R247PPE666AZF","short_pith_number":"pith:ZDPNMRRF","canonical_record":{"source":{"id":"0901.0565","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-01-05T21:55:42Z","cross_cats_sorted":[],"title_canon_sha256":"abe826966e4e534860cf8539f074dd9c192d727dfa43d05067ba5b5896f0032a","abstract_canon_sha256":"0e490c2b00b3754cab90820d8d08ac7cba628f2b37177175889214feef962598"},"schema_version":"1.0"},"canonical_sha256":"c8ded64625f1930e475cfbde4f7bc0c952828616411842f42cb985353259540c","source":{"kind":"arxiv","id":"0901.0565","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0901.0565","created_at":"2026-07-04T17:14:00Z"},{"alias_kind":"arxiv_version","alias_value":"0901.0565v1","created_at":"2026-07-04T17:14:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0901.0565","created_at":"2026-07-04T17:14:00Z"},{"alias_kind":"pith_short_12","alias_value":"ZDPNMRRF6GJQ","created_at":"2026-07-04T17:14:00Z"},{"alias_kind":"pith_short_16","alias_value":"ZDPNMRRF6GJQ4R24","created_at":"2026-07-04T17:14:00Z"},{"alias_kind":"pith_short_8","alias_value":"ZDPNMRRF","created_at":"2026-07-04T17:14:00Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:ZDPNMRRF6GJQ4R247PPE666AZF","target":"record","payload":{"canonical_record":{"source":{"id":"0901.0565","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-01-05T21:55:42Z","cross_cats_sorted":[],"title_canon_sha256":"abe826966e4e534860cf8539f074dd9c192d727dfa43d05067ba5b5896f0032a","abstract_canon_sha256":"0e490c2b00b3754cab90820d8d08ac7cba628f2b37177175889214feef962598"},"schema_version":"1.0"},"canonical_sha256":"c8ded64625f1930e475cfbde4f7bc0c952828616411842f42cb985353259540c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:14:00.442755Z","signature_b64":"d2rkaKQXEvUN0tbXThIuzin130PaJU3n8x3XSxU1ULwvfH8VUW0Jl695ENd/HzcM5sNy3VxoPM7VtmSw+ONHCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c8ded64625f1930e475cfbde4f7bc0c952828616411842f42cb985353259540c","last_reissued_at":"2026-07-04T17:14:00.442349Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:14:00.442349Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0901.0565","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":"2026-07-04T17:14:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"S47h0epaDB+31+tBkptWHV0pu8EM0pIOqTXWgwY0Pnbg2DkTf4SY6K6Lso3bZaXiQZONnG4p6V/5S4ybi6MyCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T07:21:04.956065Z"},"content_sha256":"7332589add32569554323830195438757cb272f2e46a61c2f5408656decfd9e5","schema_version":"1.0","event_id":"sha256:7332589add32569554323830195438757cb272f2e46a61c2f5408656decfd9e5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:ZDPNMRRF6GJQ4R247PPE666AZF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Six more quasars at redshift 6 discovered by the Canada-France High-z Quasar Survey","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. Omont, C. J. Willott, C. Reyle, D. Crampton, D. Schade, J. Bergeron, J. B. Hutchings, L. Albert, P. Delorme, R. J. McLure, T. Forveille, X. Delfosse","submitted_at":"2009-01-05T21:55:42Z","abstract_excerpt":"We present imaging and spectroscopic observations for six quasars at z>5.9 discovered by the Canada-France High-z Quasar Survey (CFHQS). The CFHQS contains sub-surveys with a range of flux and area combinations to sample a wide range of quasar luminosities at z~6. The new quasars have luminosities 10 to 75 times lower than the most luminous SDSS quasars at this redshift. The least luminous quasar, CFHQS J0216-0455 at z=6.01, has absolute magnitude M_1450=-22.21, well below the likely break in the luminosity function. This quasar is not detected in a deep XMM-Newton survey showing that optical "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0901.0565","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0901.0565/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T17:14:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qf0ysn8bkM92R1gZataZz1ElwaVPZJ3f3qwNDm+q1nktY2yLClyIlAMk+BTBNblUQVUXLCDwNeTWSdPgd9kHDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T07:21:04.957100Z"},"content_sha256":"9aa4944ee0ca3e08a7b9e11c3ad164ec73ce6f8b78f99ea864038c3dcccb2874","schema_version":"1.0","event_id":"sha256:9aa4944ee0ca3e08a7b9e11c3ad164ec73ce6f8b78f99ea864038c3dcccb2874"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZDPNMRRF6GJQ4R247PPE666AZF/bundle.json","state_url":"https://pith.science/pith/ZDPNMRRF6GJQ4R247PPE666AZF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZDPNMRRF6GJQ4R247PPE666AZF/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":"2026-08-12T07:21:04Z","links":{"resolver":"https://pith.science/pith/ZDPNMRRF6GJQ4R247PPE666AZF","bundle":"https://pith.science/pith/ZDPNMRRF6GJQ4R247PPE666AZF/bundle.json","state":"https://pith.science/pith/ZDPNMRRF6GJQ4R247PPE666AZF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZDPNMRRF6GJQ4R247PPE666AZF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:ZDPNMRRF6GJQ4R247PPE666AZF","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":"0e490c2b00b3754cab90820d8d08ac7cba628f2b37177175889214feef962598","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-01-05T21:55:42Z","title_canon_sha256":"abe826966e4e534860cf8539f074dd9c192d727dfa43d05067ba5b5896f0032a"},"schema_version":"1.0","source":{"id":"0901.0565","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0901.0565","created_at":"2026-07-04T17:14:00Z"},{"alias_kind":"arxiv_version","alias_value":"0901.0565v1","created_at":"2026-07-04T17:14:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0901.0565","created_at":"2026-07-04T17:14:00Z"},{"alias_kind":"pith_short_12","alias_value":"ZDPNMRRF6GJQ","created_at":"2026-07-04T17:14:00Z"},{"alias_kind":"pith_short_16","alias_value":"ZDPNMRRF6GJQ4R24","created_at":"2026-07-04T17:14:00Z"},{"alias_kind":"pith_short_8","alias_value":"ZDPNMRRF","created_at":"2026-07-04T17:14:00Z"}],"graph_snapshots":[{"event_id":"sha256:9aa4944ee0ca3e08a7b9e11c3ad164ec73ce6f8b78f99ea864038c3dcccb2874","target":"graph","created_at":"2026-07-04T17:14:00Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/0901.0565/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present imaging and spectroscopic observations for six quasars at z>5.9 discovered by the Canada-France High-z Quasar Survey (CFHQS). The CFHQS contains sub-surveys with a range of flux and area combinations to sample a wide range of quasar luminosities at z~6. The new quasars have luminosities 10 to 75 times lower than the most luminous SDSS quasars at this redshift. The least luminous quasar, CFHQS J0216-0455 at z=6.01, has absolute magnitude M_1450=-22.21, well below the likely break in the luminosity function. This quasar is not detected in a deep XMM-Newton survey showing that optical ","authors_text":"A. Omont, C. J. Willott, C. Reyle, D. Crampton, D. Schade, J. Bergeron, J. B. Hutchings, L. Albert, P. Delorme, R. J. McLure, T. Forveille, X. Delfosse","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-01-05T21:55:42Z","title":"Six more quasars at redshift 6 discovered by the Canada-France High-z Quasar Survey"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0901.0565","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":"sha256:7332589add32569554323830195438757cb272f2e46a61c2f5408656decfd9e5","target":"record","created_at":"2026-07-04T17:14:00Z","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":"0e490c2b00b3754cab90820d8d08ac7cba628f2b37177175889214feef962598","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-01-05T21:55:42Z","title_canon_sha256":"abe826966e4e534860cf8539f074dd9c192d727dfa43d05067ba5b5896f0032a"},"schema_version":"1.0","source":{"id":"0901.0565","kind":"arxiv","version":1}},"canonical_sha256":"c8ded64625f1930e475cfbde4f7bc0c952828616411842f42cb985353259540c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c8ded64625f1930e475cfbde4f7bc0c952828616411842f42cb985353259540c","first_computed_at":"2026-07-04T17:14:00.442349Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:14:00.442349Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"d2rkaKQXEvUN0tbXThIuzin130PaJU3n8x3XSxU1ULwvfH8VUW0Jl695ENd/HzcM5sNy3VxoPM7VtmSw+ONHCw==","signature_status":"signed_v1","signed_at":"2026-07-04T17:14:00.442755Z","signed_message":"canonical_sha256_bytes"},"source_id":"0901.0565","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7332589add32569554323830195438757cb272f2e46a61c2f5408656decfd9e5","sha256:9aa4944ee0ca3e08a7b9e11c3ad164ec73ce6f8b78f99ea864038c3dcccb2874"],"state_sha256":"1044a4f1e50386cbed2d3a5449cfb2325d4a74de944508c838038d430ae97da2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MIa793b846LpBYbAn+EWLDP5gW8UBUnbD+02QALemWGN3oRfETq0IK8SOihXZ3N15xWQNXFJyaaqSszz+BuBBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-12T07:21:04.962697Z","bundle_sha256":"9748bad6b71441d8a667406e52b249b0e17f15615616a8132ad38b34baca7047"}}