{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:UYBM4TJ3EOJOWRZCP2TDKTBOCW","short_pith_number":"pith:UYBM4TJ3","canonical_record":{"source":{"id":"2004.09542","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-04-20T18:03:19Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"3c3ac170c3bf36cf20ebf4e718412b9746ace82d86f17b0b4a87656d1fbc4926","abstract_canon_sha256":"f72ec97dc2dfe090b9f1f7bf43722e5dbc8443171ab316a511fc697e29734748"},"schema_version":"1.0"},"canonical_sha256":"a602ce4d3b2392eb47227ea6354c2e158c74ca833f79b44b7923ea6a6fe9cd93","source":{"kind":"arxiv","id":"2004.09542","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2004.09542","created_at":"2026-07-05T01:32:03Z"},{"alias_kind":"arxiv_version","alias_value":"2004.09542v1","created_at":"2026-07-05T01:32:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2004.09542","created_at":"2026-07-05T01:32:03Z"},{"alias_kind":"pith_short_12","alias_value":"UYBM4TJ3EOJO","created_at":"2026-07-05T01:32:03Z"},{"alias_kind":"pith_short_16","alias_value":"UYBM4TJ3EOJOWRZC","created_at":"2026-07-05T01:32:03Z"},{"alias_kind":"pith_short_8","alias_value":"UYBM4TJ3","created_at":"2026-07-05T01:32:03Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:UYBM4TJ3EOJOWRZCP2TDKTBOCW","target":"record","payload":{"canonical_record":{"source":{"id":"2004.09542","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-04-20T18:03:19Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"3c3ac170c3bf36cf20ebf4e718412b9746ace82d86f17b0b4a87656d1fbc4926","abstract_canon_sha256":"f72ec97dc2dfe090b9f1f7bf43722e5dbc8443171ab316a511fc697e29734748"},"schema_version":"1.0"},"canonical_sha256":"a602ce4d3b2392eb47227ea6354c2e158c74ca833f79b44b7923ea6a6fe9cd93","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:32:03.454129Z","signature_b64":"b2bOng7Ngg2YOS1ezXyfLp4I7FT+8/beZuMS+6FEklhUSiAIAPniD5RbM9VyXGV/VAjZFwyGmq7ZZKFPOTrrAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a602ce4d3b2392eb47227ea6354c2e158c74ca833f79b44b7923ea6a6fe9cd93","last_reissued_at":"2026-07-05T01:32:03.453682Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:32:03.453682Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2004.09542","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":"2026-07-05T01:32:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"T50sisH+9F/lQXLKampk3BtAD4lTb+0JR6Amj75schfRSQMAp5yTh9yey+3bfuTQHAU1xCwVNIO6vqi+6qAtAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T02:32:31.192199Z"},"content_sha256":"babf1f70c6c2c86287b7dfa1a2d55e12270046d1f58f3282b9d0843033741878","schema_version":"1.0","event_id":"sha256:babf1f70c6c2c86287b7dfa1a2d55e12270046d1f58f3282b9d0843033741878"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:UYBM4TJ3EOJOWRZCP2TDKTBOCW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Propagating sample variance uncertainties in redshift calibration: simulations, theory and application to the COSMOS2015 data","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.CO","authors_text":"Alex Alarcon, Carles S\\'anchez, Gary M. Bernstein, Marco Raveri","submitted_at":"2020-04-20T18:03:19Z","abstract_excerpt":"Cosmological analyses of galaxy surveys rely on knowledge of the redshift distribution of their galaxy sample. This is usually derived from a spectroscopic and/or many-band photometric calibrator survey of a small patch of sky. The uncertainties in the redshift distribution of the calibrator sample include a contribution from shot noise, or Poisson sampling errors, but, given the small volume they probe, they are dominated by sample variance introduced by large-scale structures. Redshift uncertainties have been shown to constitute one of the leading contributions to systematic uncertainties in"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2004.09542","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/2004.09542/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":"2026-07-05T01:32:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"U9UUAXynsOJtdhV/f0UKVw3AeKZtDGHr1La2k78ie16Pp+XvAhUcE0jv3JSpnfo+LEmY/SCqZO0dRKdrspmUDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T02:32:31.192754Z"},"content_sha256":"b1fb37b0198976a0f4e23b81c62e8797aae7b237bbf62d23385c08ceb24dc68b","schema_version":"1.0","event_id":"sha256:b1fb37b0198976a0f4e23b81c62e8797aae7b237bbf62d23385c08ceb24dc68b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UYBM4TJ3EOJOWRZCP2TDKTBOCW/bundle.json","state_url":"https://pith.science/pith/UYBM4TJ3EOJOWRZCP2TDKTBOCW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UYBM4TJ3EOJOWRZCP2TDKTBOCW/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":"2026-08-05T02:32:31Z","links":{"resolver":"https://pith.science/pith/UYBM4TJ3EOJOWRZCP2TDKTBOCW","bundle":"https://pith.science/pith/UYBM4TJ3EOJOWRZCP2TDKTBOCW/bundle.json","state":"https://pith.science/pith/UYBM4TJ3EOJOWRZCP2TDKTBOCW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UYBM4TJ3EOJOWRZCP2TDKTBOCW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:UYBM4TJ3EOJOWRZCP2TDKTBOCW","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":"f72ec97dc2dfe090b9f1f7bf43722e5dbc8443171ab316a511fc697e29734748","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-04-20T18:03:19Z","title_canon_sha256":"3c3ac170c3bf36cf20ebf4e718412b9746ace82d86f17b0b4a87656d1fbc4926"},"schema_version":"1.0","source":{"id":"2004.09542","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2004.09542","created_at":"2026-07-05T01:32:03Z"},{"alias_kind":"arxiv_version","alias_value":"2004.09542v1","created_at":"2026-07-05T01:32:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2004.09542","created_at":"2026-07-05T01:32:03Z"},{"alias_kind":"pith_short_12","alias_value":"UYBM4TJ3EOJO","created_at":"2026-07-05T01:32:03Z"},{"alias_kind":"pith_short_16","alias_value":"UYBM4TJ3EOJOWRZC","created_at":"2026-07-05T01:32:03Z"},{"alias_kind":"pith_short_8","alias_value":"UYBM4TJ3","created_at":"2026-07-05T01:32:03Z"}],"graph_snapshots":[{"event_id":"sha256:b1fb37b0198976a0f4e23b81c62e8797aae7b237bbf62d23385c08ceb24dc68b","target":"graph","created_at":"2026-07-05T01:32:03Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2004.09542/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Cosmological analyses of galaxy surveys rely on knowledge of the redshift distribution of their galaxy sample. This is usually derived from a spectroscopic and/or many-band photometric calibrator survey of a small patch of sky. The uncertainties in the redshift distribution of the calibrator sample include a contribution from shot noise, or Poisson sampling errors, but, given the small volume they probe, they are dominated by sample variance introduced by large-scale structures. Redshift uncertainties have been shown to constitute one of the leading contributions to systematic uncertainties in","authors_text":"Alex Alarcon, Carles S\\'anchez, Gary M. Bernstein, Marco Raveri","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-04-20T18:03:19Z","title":"Propagating sample variance uncertainties in redshift calibration: simulations, theory and application to the COSMOS2015 data"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2004.09542","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:babf1f70c6c2c86287b7dfa1a2d55e12270046d1f58f3282b9d0843033741878","target":"record","created_at":"2026-07-05T01:32:03Z","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":"f72ec97dc2dfe090b9f1f7bf43722e5dbc8443171ab316a511fc697e29734748","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-04-20T18:03:19Z","title_canon_sha256":"3c3ac170c3bf36cf20ebf4e718412b9746ace82d86f17b0b4a87656d1fbc4926"},"schema_version":"1.0","source":{"id":"2004.09542","kind":"arxiv","version":1}},"canonical_sha256":"a602ce4d3b2392eb47227ea6354c2e158c74ca833f79b44b7923ea6a6fe9cd93","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a602ce4d3b2392eb47227ea6354c2e158c74ca833f79b44b7923ea6a6fe9cd93","first_computed_at":"2026-07-05T01:32:03.453682Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:32:03.453682Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"b2bOng7Ngg2YOS1ezXyfLp4I7FT+8/beZuMS+6FEklhUSiAIAPniD5RbM9VyXGV/VAjZFwyGmq7ZZKFPOTrrAA==","signature_status":"signed_v1","signed_at":"2026-07-05T01:32:03.454129Z","signed_message":"canonical_sha256_bytes"},"source_id":"2004.09542","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:babf1f70c6c2c86287b7dfa1a2d55e12270046d1f58f3282b9d0843033741878","sha256:b1fb37b0198976a0f4e23b81c62e8797aae7b237bbf62d23385c08ceb24dc68b"],"state_sha256":"a0c5b07a79f42ab0196fdac56fa5a72999ff05a172a67986232dd7fc44d9b2d4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UVki3TI49HnjpZp0le1uSlQ8ktKcH4/GUXdghwcqaV0dZ1vVZkddNp5JFBCCEx0gjMDFiWne9CUNjgn0fj8XCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T02:32:31.201741Z","bundle_sha256":"aac5d0c68438ef33247a98b2a16d2d38b43566626d4c74b5e92ec31f9eaf3488"}}