{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:EYLNFUDSRTVP6IKKIIJVRL2DZN","short_pith_number":"pith:EYLNFUDS","canonical_record":{"source":{"id":"2101.03723","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-01-11T06:23:51Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"50fd1aef5a3f48fa93d66ac61866a0cb473097c8a0b7d904d0c288eb8dfbd39b","abstract_canon_sha256":"7fc0bf4be1712055f551a0faf71c7c853448e94a26909739d40c5b806eb1b14c"},"schema_version":"1.0"},"canonical_sha256":"2616d2d0728ceaff214a421358af43cb50780c325977a9f72add706330c83ae9","source":{"kind":"arxiv","id":"2101.03723","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2101.03723","created_at":"2026-07-05T02:25:34Z"},{"alias_kind":"arxiv_version","alias_value":"2101.03723v2","created_at":"2026-07-05T02:25:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2101.03723","created_at":"2026-07-05T02:25:34Z"},{"alias_kind":"pith_short_12","alias_value":"EYLNFUDSRTVP","created_at":"2026-07-05T02:25:34Z"},{"alias_kind":"pith_short_16","alias_value":"EYLNFUDSRTVP6IKK","created_at":"2026-07-05T02:25:34Z"},{"alias_kind":"pith_short_8","alias_value":"EYLNFUDS","created_at":"2026-07-05T02:25:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:EYLNFUDSRTVP6IKKIIJVRL2DZN","target":"record","payload":{"canonical_record":{"source":{"id":"2101.03723","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-01-11T06:23:51Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"50fd1aef5a3f48fa93d66ac61866a0cb473097c8a0b7d904d0c288eb8dfbd39b","abstract_canon_sha256":"7fc0bf4be1712055f551a0faf71c7c853448e94a26909739d40c5b806eb1b14c"},"schema_version":"1.0"},"canonical_sha256":"2616d2d0728ceaff214a421358af43cb50780c325977a9f72add706330c83ae9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:25:34.325229Z","signature_b64":"C39uLxBcXso/Iwr+UuQoGuR8AwXMMyzn3Q5cHyTCZf85Vj1J5BL/ftaeUh+UkETnigQqjX79wbod9J6QPA79AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2616d2d0728ceaff214a421358af43cb50780c325977a9f72add706330c83ae9","last_reissued_at":"2026-07-05T02:25:34.324768Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:25:34.324768Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2101.03723","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":"2026-07-05T02:25:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nxWzAKfnVuhCe0M+PMLS+G5DEEWHVye9+iO/GsqRhUXC+ItG3osYOG4kZoWUOg0ufsUWRLFp3ipzMUXY3fsuCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T13:53:19.544997Z"},"content_sha256":"bdcc44f4af3271e79242236cebaf2a7878679fbf4b64f5d9f9ff6900dcd76721","schema_version":"1.0","event_id":"sha256:bdcc44f4af3271e79242236cebaf2a7878679fbf4b64f5d9f9ff6900dcd76721"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:EYLNFUDSRTVP6IKKIIJVRL2DZN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The PAU Survey: narrowband photometric redshifts using Gaussian processes","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.CO","authors_text":"Alex Alarcon, Benjamin Joachimi, Cristobal Padilla, Enrique Fern\\'andez, Enrique Gaztanaga, Eusebio S\\'anchez, Francisco J. Castander, Hendrik Hildebrandt, Henk Hoekstra, John Y. H. Soo, Jorge Carretero, Juan Garci\\'a-Bellido, Laura Cabayol, Ma{\\l}gorzata Siudek, Martin Eriksen, Pau Tallada-Cresp\\'i, Ramon Miquel, Ricard Casas, Santiago Serrano","submitted_at":"2021-01-11T06:23:51Z","abstract_excerpt":"We study the performance of the hybrid template-machine-learning photometric redshift (photo-$z$) algorithm Delight, which uses Gaussian processes, on a subset of the early data release of the Physics of the Accelerating Universe Survey (PAUS). We calibrate the fluxes of the $40$ PAUS narrow bands with $6$ broadband fluxes ($uBVriz$) in the COSMOS field using three different methods, including a new method which utilises the correlation between the apparent size and overall flux of the galaxy. We use a rich set of empirically derived galaxy spectral templates as guides to train the Gaussian pr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2101.03723","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2101.03723/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":"2026-07-05T02:25:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nx/BuWHSb/whlKYAtfByQ+1Z3biouZ7WfSR5GyjPjBBI5oDEjvk3D8aOsAzA6I3cYoiS0vfMcQMi1rGxJflKCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T13:53:19.545405Z"},"content_sha256":"fd68768e616640ddb0878a4b585fcd7ea28fa4c5d1df38fce09a5518a349e67c","schema_version":"1.0","event_id":"sha256:fd68768e616640ddb0878a4b585fcd7ea28fa4c5d1df38fce09a5518a349e67c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EYLNFUDSRTVP6IKKIIJVRL2DZN/bundle.json","state_url":"https://pith.science/pith/EYLNFUDSRTVP6IKKIIJVRL2DZN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EYLNFUDSRTVP6IKKIIJVRL2DZN/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":"2026-07-07T13:53:19Z","links":{"resolver":"https://pith.science/pith/EYLNFUDSRTVP6IKKIIJVRL2DZN","bundle":"https://pith.science/pith/EYLNFUDSRTVP6IKKIIJVRL2DZN/bundle.json","state":"https://pith.science/pith/EYLNFUDSRTVP6IKKIIJVRL2DZN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EYLNFUDSRTVP6IKKIIJVRL2DZN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:EYLNFUDSRTVP6IKKIIJVRL2DZN","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":"7fc0bf4be1712055f551a0faf71c7c853448e94a26909739d40c5b806eb1b14c","cross_cats_sorted":["astro-ph.IM"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-01-11T06:23:51Z","title_canon_sha256":"50fd1aef5a3f48fa93d66ac61866a0cb473097c8a0b7d904d0c288eb8dfbd39b"},"schema_version":"1.0","source":{"id":"2101.03723","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2101.03723","created_at":"2026-07-05T02:25:34Z"},{"alias_kind":"arxiv_version","alias_value":"2101.03723v2","created_at":"2026-07-05T02:25:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2101.03723","created_at":"2026-07-05T02:25:34Z"},{"alias_kind":"pith_short_12","alias_value":"EYLNFUDSRTVP","created_at":"2026-07-05T02:25:34Z"},{"alias_kind":"pith_short_16","alias_value":"EYLNFUDSRTVP6IKK","created_at":"2026-07-05T02:25:34Z"},{"alias_kind":"pith_short_8","alias_value":"EYLNFUDS","created_at":"2026-07-05T02:25:34Z"}],"graph_snapshots":[{"event_id":"sha256:fd68768e616640ddb0878a4b585fcd7ea28fa4c5d1df38fce09a5518a349e67c","target":"graph","created_at":"2026-07-05T02:25:34Z","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/2101.03723/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We study the performance of the hybrid template-machine-learning photometric redshift (photo-$z$) algorithm Delight, which uses Gaussian processes, on a subset of the early data release of the Physics of the Accelerating Universe Survey (PAUS). We calibrate the fluxes of the $40$ PAUS narrow bands with $6$ broadband fluxes ($uBVriz$) in the COSMOS field using three different methods, including a new method which utilises the correlation between the apparent size and overall flux of the galaxy. We use a rich set of empirically derived galaxy spectral templates as guides to train the Gaussian pr","authors_text":"Alex Alarcon, Benjamin Joachimi, Cristobal Padilla, Enrique Fern\\'andez, Enrique Gaztanaga, Eusebio S\\'anchez, Francisco J. Castander, Hendrik Hildebrandt, Henk Hoekstra, John Y. H. Soo, Jorge Carretero, Juan Garci\\'a-Bellido, Laura Cabayol, Ma{\\l}gorzata Siudek, Martin Eriksen, Pau Tallada-Cresp\\'i, Ramon Miquel, Ricard Casas, Santiago Serrano","cross_cats":["astro-ph.IM"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-01-11T06:23:51Z","title":"The PAU Survey: narrowband photometric redshifts using Gaussian processes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2101.03723","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:bdcc44f4af3271e79242236cebaf2a7878679fbf4b64f5d9f9ff6900dcd76721","target":"record","created_at":"2026-07-05T02:25:34Z","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":"7fc0bf4be1712055f551a0faf71c7c853448e94a26909739d40c5b806eb1b14c","cross_cats_sorted":["astro-ph.IM"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-01-11T06:23:51Z","title_canon_sha256":"50fd1aef5a3f48fa93d66ac61866a0cb473097c8a0b7d904d0c288eb8dfbd39b"},"schema_version":"1.0","source":{"id":"2101.03723","kind":"arxiv","version":2}},"canonical_sha256":"2616d2d0728ceaff214a421358af43cb50780c325977a9f72add706330c83ae9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2616d2d0728ceaff214a421358af43cb50780c325977a9f72add706330c83ae9","first_computed_at":"2026-07-05T02:25:34.324768Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:25:34.324768Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"C39uLxBcXso/Iwr+UuQoGuR8AwXMMyzn3Q5cHyTCZf85Vj1J5BL/ftaeUh+UkETnigQqjX79wbod9J6QPA79AA==","signature_status":"signed_v1","signed_at":"2026-07-05T02:25:34.325229Z","signed_message":"canonical_sha256_bytes"},"source_id":"2101.03723","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bdcc44f4af3271e79242236cebaf2a7878679fbf4b64f5d9f9ff6900dcd76721","sha256:fd68768e616640ddb0878a4b585fcd7ea28fa4c5d1df38fce09a5518a349e67c"],"state_sha256":"b46537bf7a68c1f4da1cb76666c7c05778a67a957711f85e2b0b17335a520fc6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"d2Yl5jyvhw2YeCw1UwmfhJhMpRL79gicxqgXgpETcMODhCDZ+Nq0IdPTjynVGzgaSt0wWQLPCSJ1L9iTdad/CQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T13:53:19.547275Z","bundle_sha256":"e3bc80de246a4e5c78827666c5a058e660d7abdffe2d82e647944425a0687d26"}}