{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2001:YSWS4HTJJ7I3MIO3TNEA42CGWS","short_pith_number":"pith:YSWS4HTJ","canonical_record":{"source":{"id":"astro-ph/0109328","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2001-09-19T22:04:47Z","cross_cats_sorted":[],"title_canon_sha256":"31a5fe3c1404c20477b2a1517aed6a04a0db07dddebc2fe5a1bbe1e7513c1c9c","abstract_canon_sha256":"d9cbf0900da144a140f21159425fa3633f83b2102982158d043fa30a30832d73"},"schema_version":"1.0"},"canonical_sha256":"c4ad2e1e694fd1b621db9b480e6846b4a8529a4b3f4641bb3374f8f34392f5d3","source":{"kind":"arxiv","id":"astro-ph/0109328","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0109328","created_at":"2026-05-18T02:40:35Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0109328v1","created_at":"2026-05-18T02:40:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0109328","created_at":"2026-05-18T02:40:35Z"},{"alias_kind":"pith_short_12","alias_value":"YSWS4HTJJ7I3","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"YSWS4HTJJ7I3MIO3","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"YSWS4HTJ","created_at":"2026-05-18T12:25:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2001:YSWS4HTJJ7I3MIO3TNEA42CGWS","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0109328","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2001-09-19T22:04:47Z","cross_cats_sorted":[],"title_canon_sha256":"31a5fe3c1404c20477b2a1517aed6a04a0db07dddebc2fe5a1bbe1e7513c1c9c","abstract_canon_sha256":"d9cbf0900da144a140f21159425fa3633f83b2102982158d043fa30a30832d73"},"schema_version":"1.0"},"canonical_sha256":"c4ad2e1e694fd1b621db9b480e6846b4a8529a4b3f4641bb3374f8f34392f5d3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:40:35.944260Z","signature_b64":"WXojVx7xeNgZD3op88+W98T5oHWYJ45/Zq2eLyklEscd1hHDzyzZh5Fe0vD4l86KnMNIPAtOcieLb9tdNwp5BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c4ad2e1e694fd1b621db9b480e6846b4a8529a4b3f4641bb3374f8f34392f5d3","last_reissued_at":"2026-05-18T02:40:35.943680Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:40:35.943680Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0109328","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":"2026-05-18T02:40:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/Nm36vj2mT0Ly0+PLZD2kojduEAF9Jhvm/DvLaomluAb/MCRdSHNnz8jk34jehWHsrX04tcHp1ZeEett9r+BDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T06:58:21.400950Z"},"content_sha256":"851626e94eb277c249045ac0ee4a3de74cd216a49ca77b2e56e58f8c53ff9420","schema_version":"1.0","event_id":"sha256:851626e94eb277c249045ac0ee4a3de74cd216a49ca77b2e56e58f8c53ff9420"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2001:YSWS4HTJJ7I3MIO3TNEA42CGWS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Emission-Line Properties of z > 4 Quasars","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Anca Constantin (Ohio U.), Craig B. Foltz (MMT Observatory), Frederic H. Chaffee (Keck Observatory), Fred Hamann (U. Florida), Joseph C. Shields (Ohio U.)","submitted_at":"2001-09-19T22:04:47Z","abstract_excerpt":"We present results of a program of high signal-to-noise spectroscopy for 44 QSOs at redshifts > 4 using the MMT and Keck observatories. The quasar spectra cover 1100 -- 1700 A in the rest frame for sources spanning a luminosity range of approximately 2 orders of magnitude. Comparisons between these data and spectra of lower redshift quasars reveal a high degree of similarity, although differences are present in the profiles and the strengths of some emission features. An examination of the luminosity dependence of the emission lines reveals evidence for a weak or absent Baldwin effect among z "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0109328","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":"2026-05-18T02:40:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WwEJefN1uT2p5F1ojiC9mtjhjpUTBPhx3b4CEUH8USMo3VoOeKNYnX5YMC+LJDix10O7teRs5ZZvuKz33tZjDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T06:58:21.401272Z"},"content_sha256":"75b08224b50824d87d3a60e5a6c4efc70d0e241926300d813f00d54f68d04b2b","schema_version":"1.0","event_id":"sha256:75b08224b50824d87d3a60e5a6c4efc70d0e241926300d813f00d54f68d04b2b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YSWS4HTJJ7I3MIO3TNEA42CGWS/bundle.json","state_url":"https://pith.science/pith/YSWS4HTJJ7I3MIO3TNEA42CGWS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YSWS4HTJJ7I3MIO3TNEA42CGWS/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":"2026-06-27T06:58:21Z","links":{"resolver":"https://pith.science/pith/YSWS4HTJJ7I3MIO3TNEA42CGWS","bundle":"https://pith.science/pith/YSWS4HTJJ7I3MIO3TNEA42CGWS/bundle.json","state":"https://pith.science/pith/YSWS4HTJJ7I3MIO3TNEA42CGWS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YSWS4HTJJ7I3MIO3TNEA42CGWS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2001:YSWS4HTJJ7I3MIO3TNEA42CGWS","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":"d9cbf0900da144a140f21159425fa3633f83b2102982158d043fa30a30832d73","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2001-09-19T22:04:47Z","title_canon_sha256":"31a5fe3c1404c20477b2a1517aed6a04a0db07dddebc2fe5a1bbe1e7513c1c9c"},"schema_version":"1.0","source":{"id":"astro-ph/0109328","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0109328","created_at":"2026-05-18T02:40:35Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0109328v1","created_at":"2026-05-18T02:40:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0109328","created_at":"2026-05-18T02:40:35Z"},{"alias_kind":"pith_short_12","alias_value":"YSWS4HTJJ7I3","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"YSWS4HTJJ7I3MIO3","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"YSWS4HTJ","created_at":"2026-05-18T12:25:50Z"}],"graph_snapshots":[{"event_id":"sha256:75b08224b50824d87d3a60e5a6c4efc70d0e241926300d813f00d54f68d04b2b","target":"graph","created_at":"2026-05-18T02:40:35Z","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 present results of a program of high signal-to-noise spectroscopy for 44 QSOs at redshifts > 4 using the MMT and Keck observatories. The quasar spectra cover 1100 -- 1700 A in the rest frame for sources spanning a luminosity range of approximately 2 orders of magnitude. Comparisons between these data and spectra of lower redshift quasars reveal a high degree of similarity, although differences are present in the profiles and the strengths of some emission features. An examination of the luminosity dependence of the emission lines reveals evidence for a weak or absent Baldwin effect among z ","authors_text":"Anca Constantin (Ohio U.), Craig B. Foltz (MMT Observatory), Frederic H. Chaffee (Keck Observatory), Fred Hamann (U. Florida), Joseph C. Shields (Ohio U.)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2001-09-19T22:04:47Z","title":"Emission-Line Properties of z > 4 Quasars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0109328","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":"sha256:851626e94eb277c249045ac0ee4a3de74cd216a49ca77b2e56e58f8c53ff9420","target":"record","created_at":"2026-05-18T02:40:35Z","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":"d9cbf0900da144a140f21159425fa3633f83b2102982158d043fa30a30832d73","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2001-09-19T22:04:47Z","title_canon_sha256":"31a5fe3c1404c20477b2a1517aed6a04a0db07dddebc2fe5a1bbe1e7513c1c9c"},"schema_version":"1.0","source":{"id":"astro-ph/0109328","kind":"arxiv","version":1}},"canonical_sha256":"c4ad2e1e694fd1b621db9b480e6846b4a8529a4b3f4641bb3374f8f34392f5d3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c4ad2e1e694fd1b621db9b480e6846b4a8529a4b3f4641bb3374f8f34392f5d3","first_computed_at":"2026-05-18T02:40:35.943680Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:40:35.943680Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WXojVx7xeNgZD3op88+W98T5oHWYJ45/Zq2eLyklEscd1hHDzyzZh5Fe0vD4l86KnMNIPAtOcieLb9tdNwp5BA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:40:35.944260Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0109328","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:851626e94eb277c249045ac0ee4a3de74cd216a49ca77b2e56e58f8c53ff9420","sha256:75b08224b50824d87d3a60e5a6c4efc70d0e241926300d813f00d54f68d04b2b"],"state_sha256":"7e39abde7e45a8c39d61590b12741c020b58cb49cda58dee01056d840ac783ce"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VAwP6lqrvXYPr9PEHCtP+vgj7SM9DuECw8dbw3BsOiK4PbDHna3ELXMEHjAnt8wQpIYzJN4ZES4l1WKCKFBKDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-27T06:58:21.403024Z","bundle_sha256":"142e13adac44166f2bdfa11fc1b2720af377f7c0ab77779cbeadf5b132ac64f7"}}