{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:MS67B7I7NLJZ6G2P27YRLJ4VRH","short_pith_number":"pith:MS67B7I7","canonical_record":{"source":{"id":"1901.07456","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-01-11T21:43:54Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"dd4018bfdbde61f3840817b6bbe1d458f5dc2ed986981563ddb3891ddf29e68b","abstract_canon_sha256":"dd50bf15d77ae45329cd2d20bd50f3a077788de7e0ed83716f17a1721d0eaeff"},"schema_version":"1.0"},"canonical_sha256":"64bdf0fd1f6ad39f1b4fd7f115a79589fafcf2b69d3377838dd90b291baef916","source":{"kind":"arxiv","id":"1901.07456","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.07456","created_at":"2026-05-17T23:43:03Z"},{"alias_kind":"arxiv_version","alias_value":"1901.07456v1","created_at":"2026-05-17T23:43:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.07456","created_at":"2026-05-17T23:43:03Z"},{"alias_kind":"pith_short_12","alias_value":"MS67B7I7NLJZ","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_16","alias_value":"MS67B7I7NLJZ6G2P","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_8","alias_value":"MS67B7I7","created_at":"2026-05-18T12:33:24Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:MS67B7I7NLJZ6G2P27YRLJ4VRH","target":"record","payload":{"canonical_record":{"source":{"id":"1901.07456","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-01-11T21:43:54Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"dd4018bfdbde61f3840817b6bbe1d458f5dc2ed986981563ddb3891ddf29e68b","abstract_canon_sha256":"dd50bf15d77ae45329cd2d20bd50f3a077788de7e0ed83716f17a1721d0eaeff"},"schema_version":"1.0"},"canonical_sha256":"64bdf0fd1f6ad39f1b4fd7f115a79589fafcf2b69d3377838dd90b291baef916","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:43:03.725465Z","signature_b64":"psrf0ZOBPRMSsrUBLEEweBfb/tLVv/MKw1wC9vIOjy8BvgreOQN/6IGmqkswRIwHUEgtdzRTOdR2X8JOUD2sCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"64bdf0fd1f6ad39f1b4fd7f115a79589fafcf2b69d3377838dd90b291baef916","last_reissued_at":"2026-05-17T23:43:03.724736Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:43:03.724736Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1901.07456","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":"2026-05-17T23:43:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"o5ncFGeKIH67zckrXQabeTAtkNHurVkwVz9G4Q6mZGfHtnKLB/dXyPccKD6+DP/DqHWClxhJbIj3TG3IxTdqDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T19:45:59.903249Z"},"content_sha256":"be65c7f9a7e2c3af0ff23a9dbfc50a299471294200078a03861730d2c2d77ad6","schema_version":"1.0","event_id":"sha256:be65c7f9a7e2c3af0ff23a9dbfc50a299471294200078a03861730d2c2d77ad6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:MS67B7I7NLJZ6G2P27YRLJ4VRH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Three new VHS-DES Quasars at 6.7 < z < 6.9 and Emission Line Properties at z > 6.5","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"A. A. Plazas, A. Carnero Rosell, A. E. Evrard, A. Roodman, B. Flaugher, B. Hoyle, C. B. D'Andrea, C. E. Cunha, D. Brooks, D. Gruen, D. J. James, D. L. Hollowood, D. L. Tucker, D. Thomas, E. Bertin, E. Buckley-Geer, E. Gaztanaga, E. Pons, E. Sanchez, E. Suchyta, F. J. Castander, F. Sobreira, G. D. Becker, G. Gutierrez, G. Tarle, H. T. Diehl, I. Sevilla-Noarbe, J. Annis, J. Carretero, J. De Vicente, J. Frieman, J. Garcia-Bellido, J. Gschwend, J. L. Marshall, K. Honscheid, K. Kuehn, L. N. da Costa, M. A. G. Maia, M. Banerji, M. Carrasco Kind, M. E. C. Swanson, M. Lima, M. Rauch, M. Schubnell, M. Smith, O. Lahav, P. C. Hewett, P. Doel, P. Martini, R. C. Smith, R. G. McMahon, R. L. C. Ogando, R. Miquel, S. Allam, S. Avila, S. Desai, S. L. Reed, S. Serrano, T. M. C. Abbott, V. Scarpine, V. Vikram","submitted_at":"2019-01-11T21:43:54Z","abstract_excerpt":"We report the results from a search for z > 6.5 quasars using the Dark Energy Survey (DES) Year 3 dataset combined with the VISTA Hemisphere Survey (VHS) and WISE All-Sky Survey. Our photometric selection method is shown to be highly efficient in identifying clean samples of high-redshift quasars leading to spectroscopic confirmation of three new quasars - VDESJ 0244-5008 (z=6.724), VDESJ 0020-3653 (z=6.834) and VDESJ 0246-5219 (z=6.90) - which were selected as the highest priority candidates in the survey data without any need for additional follow-up observations. The new quasars span the fu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.07456","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":"2026-05-17T23:43:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"APE114CodrG+SRsI3hHBXeP8mTcutnqkIeO8+Wa+CQYw8/phZJ/Z2vYxrkLows9Q0e/5zDdhtOt0VdVa1R02CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T19:45:59.903919Z"},"content_sha256":"2d50a8be51523b3dd5fcdfd4df22999ce5516ac1c954ec0e644c1810868df41c","schema_version":"1.0","event_id":"sha256:2d50a8be51523b3dd5fcdfd4df22999ce5516ac1c954ec0e644c1810868df41c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MS67B7I7NLJZ6G2P27YRLJ4VRH/bundle.json","state_url":"https://pith.science/pith/MS67B7I7NLJZ6G2P27YRLJ4VRH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MS67B7I7NLJZ6G2P27YRLJ4VRH/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":"2026-05-28T19:45:59Z","links":{"resolver":"https://pith.science/pith/MS67B7I7NLJZ6G2P27YRLJ4VRH","bundle":"https://pith.science/pith/MS67B7I7NLJZ6G2P27YRLJ4VRH/bundle.json","state":"https://pith.science/pith/MS67B7I7NLJZ6G2P27YRLJ4VRH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MS67B7I7NLJZ6G2P27YRLJ4VRH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:MS67B7I7NLJZ6G2P27YRLJ4VRH","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":"dd50bf15d77ae45329cd2d20bd50f3a077788de7e0ed83716f17a1721d0eaeff","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-01-11T21:43:54Z","title_canon_sha256":"dd4018bfdbde61f3840817b6bbe1d458f5dc2ed986981563ddb3891ddf29e68b"},"schema_version":"1.0","source":{"id":"1901.07456","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.07456","created_at":"2026-05-17T23:43:03Z"},{"alias_kind":"arxiv_version","alias_value":"1901.07456v1","created_at":"2026-05-17T23:43:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.07456","created_at":"2026-05-17T23:43:03Z"},{"alias_kind":"pith_short_12","alias_value":"MS67B7I7NLJZ","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_16","alias_value":"MS67B7I7NLJZ6G2P","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_8","alias_value":"MS67B7I7","created_at":"2026-05-18T12:33:24Z"}],"graph_snapshots":[{"event_id":"sha256:2d50a8be51523b3dd5fcdfd4df22999ce5516ac1c954ec0e644c1810868df41c","target":"graph","created_at":"2026-05-17T23:43:03Z","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 report the results from a search for z > 6.5 quasars using the Dark Energy Survey (DES) Year 3 dataset combined with the VISTA Hemisphere Survey (VHS) and WISE All-Sky Survey. Our photometric selection method is shown to be highly efficient in identifying clean samples of high-redshift quasars leading to spectroscopic confirmation of three new quasars - VDESJ 0244-5008 (z=6.724), VDESJ 0020-3653 (z=6.834) and VDESJ 0246-5219 (z=6.90) - which were selected as the highest priority candidates in the survey data without any need for additional follow-up observations. The new quasars span the fu","authors_text":"A. A. Plazas, A. Carnero Rosell, A. E. Evrard, A. Roodman, B. Flaugher, B. Hoyle, C. B. D'Andrea, C. E. Cunha, D. Brooks, D. Gruen, D. J. James, D. L. Hollowood, D. L. Tucker, D. Thomas, E. Bertin, E. Buckley-Geer, E. Gaztanaga, E. Pons, E. Sanchez, E. Suchyta, F. J. Castander, F. Sobreira, G. D. Becker, G. Gutierrez, G. Tarle, H. T. Diehl, I. Sevilla-Noarbe, J. Annis, J. Carretero, J. De Vicente, J. Frieman, J. Garcia-Bellido, J. Gschwend, J. L. Marshall, K. Honscheid, K. Kuehn, L. N. da Costa, M. A. G. Maia, M. Banerji, M. Carrasco Kind, M. E. C. Swanson, M. Lima, M. Rauch, M. Schubnell, M. Smith, O. Lahav, P. C. Hewett, P. Doel, P. Martini, R. C. Smith, R. G. McMahon, R. L. C. Ogando, R. Miquel, S. Allam, S. Avila, S. Desai, S. L. Reed, S. Serrano, T. M. C. Abbott, V. Scarpine, V. Vikram","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-01-11T21:43:54Z","title":"Three new VHS-DES Quasars at 6.7 < z < 6.9 and Emission Line Properties at z > 6.5"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.07456","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:be65c7f9a7e2c3af0ff23a9dbfc50a299471294200078a03861730d2c2d77ad6","target":"record","created_at":"2026-05-17T23:43:03Z","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":"dd50bf15d77ae45329cd2d20bd50f3a077788de7e0ed83716f17a1721d0eaeff","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-01-11T21:43:54Z","title_canon_sha256":"dd4018bfdbde61f3840817b6bbe1d458f5dc2ed986981563ddb3891ddf29e68b"},"schema_version":"1.0","source":{"id":"1901.07456","kind":"arxiv","version":1}},"canonical_sha256":"64bdf0fd1f6ad39f1b4fd7f115a79589fafcf2b69d3377838dd90b291baef916","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"64bdf0fd1f6ad39f1b4fd7f115a79589fafcf2b69d3377838dd90b291baef916","first_computed_at":"2026-05-17T23:43:03.724736Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:43:03.724736Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"psrf0ZOBPRMSsrUBLEEweBfb/tLVv/MKw1wC9vIOjy8BvgreOQN/6IGmqkswRIwHUEgtdzRTOdR2X8JOUD2sCw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:43:03.725465Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.07456","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:be65c7f9a7e2c3af0ff23a9dbfc50a299471294200078a03861730d2c2d77ad6","sha256:2d50a8be51523b3dd5fcdfd4df22999ce5516ac1c954ec0e644c1810868df41c"],"state_sha256":"cc0f1e04f604ec5b42d9959c998fac31a124c22dba4531f42cc66da08f5abd8c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hqccwu8hfrULLtfHRFf3daDUKAZI+nn313p9d2d8rXle14aHmi7dtLc7doMUv9fFHGR+0Lz5ZKK8KJEmMPCyCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T19:45:59.907221Z","bundle_sha256":"8fc4355369e66a125ca7957b26a8fa53a6899ebdd39f2945af614bcb4aea6fb2"}}