{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:3XQ3MOZISX53IFTEA3KX3TC2B7","short_pith_number":"pith:3XQ3MOZI","canonical_record":{"source":{"id":"2406.07612","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2024-06-11T18:00:01Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"108e410edfc03da0544b1d69f343d6dbe9e7a96dfd25ae6cbcd25e9addf0386a","abstract_canon_sha256":"515cc0a90a3a2676f27088390ab14a70d60d525fa0843939141f620cd32ff4c0"},"schema_version":"1.0"},"canonical_sha256":"dde1b63b2895fbb4166406d57dcc5a0fd914601ff2736e8029cedce76fae2076","source":{"kind":"arxiv","id":"2406.07612","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2406.07612","created_at":"2026-07-05T11:11:32Z"},{"alias_kind":"arxiv_version","alias_value":"2406.07612v3","created_at":"2026-07-05T11:11:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2406.07612","created_at":"2026-07-05T11:11:32Z"},{"alias_kind":"pith_short_12","alias_value":"3XQ3MOZISX53","created_at":"2026-07-05T11:11:32Z"},{"alias_kind":"pith_short_16","alias_value":"3XQ3MOZISX53IFTE","created_at":"2026-07-05T11:11:32Z"},{"alias_kind":"pith_short_8","alias_value":"3XQ3MOZI","created_at":"2026-07-05T11:11:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:3XQ3MOZISX53IFTEA3KX3TC2B7","target":"record","payload":{"canonical_record":{"source":{"id":"2406.07612","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2024-06-11T18:00:01Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"108e410edfc03da0544b1d69f343d6dbe9e7a96dfd25ae6cbcd25e9addf0386a","abstract_canon_sha256":"515cc0a90a3a2676f27088390ab14a70d60d525fa0843939141f620cd32ff4c0"},"schema_version":"1.0"},"canonical_sha256":"dde1b63b2895fbb4166406d57dcc5a0fd914601ff2736e8029cedce76fae2076","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:11:32.537214Z","signature_b64":"1FQ/jWCB6ocbAHSMhfE8nkmJS3u9Bc2PQIiIPxMLmfuRLsx5A53Ri6EAi5dLmGKUIM9/L7QLkqkF8UlEAN/MAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dde1b63b2895fbb4166406d57dcc5a0fd914601ff2736e8029cedce76fae2076","last_reissued_at":"2026-07-05T11:11:32.536676Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:11:32.536676Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2406.07612","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T11:11:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0q4vaCx/VQlCmxKVjmRfCY48tfxnzCLgTFOAMPjsVOmHWKcvhwAOfV2WcWjJNYhqFZg9tQ1lfO19oCBhSvCYAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T09:48:48.888293Z"},"content_sha256":"087d3a87df1faf6aeeac39f30338043cc3974a14767ccb12b8bdc42b65b54d21","schema_version":"1.0","event_id":"sha256:087d3a87df1faf6aeeac39f30338043cc3974a14767ccb12b8bdc42b65b54d21"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:3XQ3MOZISX53IFTEA3KX3TC2B7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optical and near-infrared spectroscopy of quasars at $z>6.5$: public data release and composite spectrum","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"Aaron J. Barth, Anna-Christina Eilers, Bram P. Venemans, Chiara Mazzucchelli, Eduardo Ba\\~nados, Emanuele Paolo Farina, Fabian Walter, Fabio Vito, Feige Wang, Frederick B. Davies, Irham T. Andika, Jan-Torge Schindler, Jinyi Yang, Joseph F. Hennawi, Masafusa Onoue, Riccardo Nanni, Roberto Decarli, Sarah E. I. Bosman, Silvia Belladitta, Silvia Onorato, Xiaohui Fan","submitted_at":"2024-06-11T18:00:01Z","abstract_excerpt":"We present optical and near-infrared (NIR) spectroscopic observations for a sample of $45$ quasars at $6.50 < z \\leq 7.64$ with absolute magnitudes at $1450$ \\r{A} in the range $-28.82 \\leq M_{1450} \\leq -24.13$ and their composite spectrum. The median redshift and $M_{1450}$ of the quasars in the sample are $z_{\\rm{median}}=6.71$ and $M_{1450,\\rm{median}} \\simeq -26.1$, respectively. The NIR spectra are taken with echelle spectrographs, complemented with additional data from optical long slit instruments, and then reduced consistently using the open-source Python-based spectroscopic data redu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2406.07612","kind":"arxiv","version":3},"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/2406.07612/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":"2026-07-05T11:11:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wDuSJpxgwSF5QzUmEmtNH75E7j1BsLKeoLACyvKOUrajvfA628h0gJ8Z1Cf4+ksyhlTBi020XgXOkxl6mDxBCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T09:48:48.888887Z"},"content_sha256":"65b526c208a8dfaef6e084fdc89cf4d975d80a40ba76b5e8321418bb131d06e1","schema_version":"1.0","event_id":"sha256:65b526c208a8dfaef6e084fdc89cf4d975d80a40ba76b5e8321418bb131d06e1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3XQ3MOZISX53IFTEA3KX3TC2B7/bundle.json","state_url":"https://pith.science/pith/3XQ3MOZISX53IFTEA3KX3TC2B7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3XQ3MOZISX53IFTEA3KX3TC2B7/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":"2026-08-20T09:48:48Z","links":{"resolver":"https://pith.science/pith/3XQ3MOZISX53IFTEA3KX3TC2B7","bundle":"https://pith.science/pith/3XQ3MOZISX53IFTEA3KX3TC2B7/bundle.json","state":"https://pith.science/pith/3XQ3MOZISX53IFTEA3KX3TC2B7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3XQ3MOZISX53IFTEA3KX3TC2B7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:3XQ3MOZISX53IFTEA3KX3TC2B7","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":"515cc0a90a3a2676f27088390ab14a70d60d525fa0843939141f620cd32ff4c0","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2024-06-11T18:00:01Z","title_canon_sha256":"108e410edfc03da0544b1d69f343d6dbe9e7a96dfd25ae6cbcd25e9addf0386a"},"schema_version":"1.0","source":{"id":"2406.07612","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2406.07612","created_at":"2026-07-05T11:11:32Z"},{"alias_kind":"arxiv_version","alias_value":"2406.07612v3","created_at":"2026-07-05T11:11:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2406.07612","created_at":"2026-07-05T11:11:32Z"},{"alias_kind":"pith_short_12","alias_value":"3XQ3MOZISX53","created_at":"2026-07-05T11:11:32Z"},{"alias_kind":"pith_short_16","alias_value":"3XQ3MOZISX53IFTE","created_at":"2026-07-05T11:11:32Z"},{"alias_kind":"pith_short_8","alias_value":"3XQ3MOZI","created_at":"2026-07-05T11:11:32Z"}],"graph_snapshots":[{"event_id":"sha256:65b526c208a8dfaef6e084fdc89cf4d975d80a40ba76b5e8321418bb131d06e1","target":"graph","created_at":"2026-07-05T11:11:32Z","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/2406.07612/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present optical and near-infrared (NIR) spectroscopic observations for a sample of $45$ quasars at $6.50 < z \\leq 7.64$ with absolute magnitudes at $1450$ \\r{A} in the range $-28.82 \\leq M_{1450} \\leq -24.13$ and their composite spectrum. The median redshift and $M_{1450}$ of the quasars in the sample are $z_{\\rm{median}}=6.71$ and $M_{1450,\\rm{median}} \\simeq -26.1$, respectively. The NIR spectra are taken with echelle spectrographs, complemented with additional data from optical long slit instruments, and then reduced consistently using the open-source Python-based spectroscopic data redu","authors_text":"Aaron J. Barth, Anna-Christina Eilers, Bram P. Venemans, Chiara Mazzucchelli, Eduardo Ba\\~nados, Emanuele Paolo Farina, Fabian Walter, Fabio Vito, Feige Wang, Frederick B. Davies, Irham T. Andika, Jan-Torge Schindler, Jinyi Yang, Joseph F. Hennawi, Masafusa Onoue, Riccardo Nanni, Roberto Decarli, Sarah E. I. Bosman, Silvia Belladitta, Silvia Onorato, Xiaohui Fan","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2024-06-11T18:00:01Z","title":"Optical and near-infrared spectroscopy of quasars at $z>6.5$: public data release and composite spectrum"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2406.07612","kind":"arxiv","version":3},"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":"sha256:087d3a87df1faf6aeeac39f30338043cc3974a14767ccb12b8bdc42b65b54d21","target":"record","created_at":"2026-07-05T11:11:32Z","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":"515cc0a90a3a2676f27088390ab14a70d60d525fa0843939141f620cd32ff4c0","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2024-06-11T18:00:01Z","title_canon_sha256":"108e410edfc03da0544b1d69f343d6dbe9e7a96dfd25ae6cbcd25e9addf0386a"},"schema_version":"1.0","source":{"id":"2406.07612","kind":"arxiv","version":3}},"canonical_sha256":"dde1b63b2895fbb4166406d57dcc5a0fd914601ff2736e8029cedce76fae2076","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dde1b63b2895fbb4166406d57dcc5a0fd914601ff2736e8029cedce76fae2076","first_computed_at":"2026-07-05T11:11:32.536676Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:11:32.536676Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1FQ/jWCB6ocbAHSMhfE8nkmJS3u9Bc2PQIiIPxMLmfuRLsx5A53Ri6EAi5dLmGKUIM9/L7QLkqkF8UlEAN/MAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T11:11:32.537214Z","signed_message":"canonical_sha256_bytes"},"source_id":"2406.07612","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:087d3a87df1faf6aeeac39f30338043cc3974a14767ccb12b8bdc42b65b54d21","sha256:65b526c208a8dfaef6e084fdc89cf4d975d80a40ba76b5e8321418bb131d06e1"],"state_sha256":"d3f134029d97e609f70769098ce0c1d32308444f87373cb1cf5d6ae7b8d0e565"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"idDjp+JpYdBIh3vLr8FuurDZTGzc/Ks6oE4Hi9sHGnK/Zk/NURfu97qk/hrOUuvGWsz9GpM+rWIdvbuGJ32+DA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-20T09:48:48.893373Z","bundle_sha256":"7715be9f260745eb60d9fe83720763b88bbd42b919c2dcc62d877ece2dfe7ff7"}}