{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:K3F5XULMV44SMV4GISCBPWJZPE","short_pith_number":"pith:K3F5XULM","canonical_record":{"source":{"id":"1906.05876","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-06-13T18:00:58Z","cross_cats_sorted":[],"title_canon_sha256":"e4b3442172e05fcd743430f53aab3761b8f7495479a2ff1c548fd56f3ae08b17","abstract_canon_sha256":"e56e0efc05bf6f0f4b4c8978425b23e4d3ad9272520281ef599d98cea86b073c"},"schema_version":"1.0"},"canonical_sha256":"56cbdbd16caf39265786448417d9397932c1227f40cfd3a3f9a7773799922423","source":{"kind":"arxiv","id":"1906.05876","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.05876","created_at":"2026-07-05T00:30:15Z"},{"alias_kind":"arxiv_version","alias_value":"1906.05876v1","created_at":"2026-07-05T00:30:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.05876","created_at":"2026-07-05T00:30:15Z"},{"alias_kind":"pith_short_12","alias_value":"K3F5XULMV44S","created_at":"2026-07-05T00:30:15Z"},{"alias_kind":"pith_short_16","alias_value":"K3F5XULMV44SMV4G","created_at":"2026-07-05T00:30:15Z"},{"alias_kind":"pith_short_8","alias_value":"K3F5XULM","created_at":"2026-07-05T00:30:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:K3F5XULMV44SMV4GISCBPWJZPE","target":"record","payload":{"canonical_record":{"source":{"id":"1906.05876","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-06-13T18:00:58Z","cross_cats_sorted":[],"title_canon_sha256":"e4b3442172e05fcd743430f53aab3761b8f7495479a2ff1c548fd56f3ae08b17","abstract_canon_sha256":"e56e0efc05bf6f0f4b4c8978425b23e4d3ad9272520281ef599d98cea86b073c"},"schema_version":"1.0"},"canonical_sha256":"56cbdbd16caf39265786448417d9397932c1227f40cfd3a3f9a7773799922423","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:30:15.644606Z","signature_b64":"EfgdMrHZBChUxPY9TaaoGUibBquX4r50etwgun570uU0kruURSh18L/Th3M1tGZpN6fZFq0kJPT9LaTSS2fLDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"56cbdbd16caf39265786448417d9397932c1227f40cfd3a3f9a7773799922423","last_reissued_at":"2026-07-05T00:30:15.644089Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:30:15.644089Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1906.05876","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":"2026-07-05T00:30:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WgMSBAp3Ga5r+w9IniGo3RrDLiHR2ind+6w+5ox41aDgzFkOU4/EYLd24N5d2c58jD7aiIM86xOR8QySLrOWAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-31T12:48:42.227402Z"},"content_sha256":"0a348ca06d4109712d3d866f1b4224c7e1f553be04a6d217a1374e2d46c4aedb","schema_version":"1.0","event_id":"sha256:0a348ca06d4109712d3d866f1b4224c7e1f553be04a6d217a1374e2d46c4aedb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:K3F5XULMV44SMV4GISCBPWJZPE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Galaxy-Galaxy Lensing in HSC: Validation Tests and the Impact of Heterogeneous Spectroscopic Training Sets","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Alexie Leauthaud, Christopher P. Bradshaw, Crist\\'obal Sif\\'on, Daniel C. Masters, Daniel J. Eisenstein, Felipe Ardila, Joshua S. Speagle, Melanie Simet, Peter L. Capak, Rachel Mandelbaum, Song Huang, Surhud More","submitted_at":"2019-06-13T18:00:58Z","abstract_excerpt":"Although photometric redshifts (photo-z's) are crucial ingredients for current and upcoming large-scale surveys, the high-quality spectroscopic redshifts currently available to train, validate, and test them are substantially non-representative in both magnitude and color. We investigate the nature and structure of this bias by tracking how objects from a heterogeneous training sample contribute to photo-z predictions as a function of magnitude and color, and illustrate that the underlying redshift distribution at fixed color can evolve strongly as a function of magnitude. We then test the rob"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.05876","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/1906.05876/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":"2026-07-05T00:30:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qbgCz09XeAqkFXqvUhn16MBBhHQUbRoxQeYue1KA+Oxslzy8lwm0tsj8rHRCDnfnB4tAjcT6muzvZlRynp0JDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-31T12:48:42.227891Z"},"content_sha256":"1e77d4ab05358d7ac36f82d3615d0183a2516f5c9da752e504ae0a10995a6c72","schema_version":"1.0","event_id":"sha256:1e77d4ab05358d7ac36f82d3615d0183a2516f5c9da752e504ae0a10995a6c72"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/K3F5XULMV44SMV4GISCBPWJZPE/bundle.json","state_url":"https://pith.science/pith/K3F5XULMV44SMV4GISCBPWJZPE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/K3F5XULMV44SMV4GISCBPWJZPE/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":"2026-07-31T12:48:42Z","links":{"resolver":"https://pith.science/pith/K3F5XULMV44SMV4GISCBPWJZPE","bundle":"https://pith.science/pith/K3F5XULMV44SMV4GISCBPWJZPE/bundle.json","state":"https://pith.science/pith/K3F5XULMV44SMV4GISCBPWJZPE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/K3F5XULMV44SMV4GISCBPWJZPE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:K3F5XULMV44SMV4GISCBPWJZPE","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":"e56e0efc05bf6f0f4b4c8978425b23e4d3ad9272520281ef599d98cea86b073c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-06-13T18:00:58Z","title_canon_sha256":"e4b3442172e05fcd743430f53aab3761b8f7495479a2ff1c548fd56f3ae08b17"},"schema_version":"1.0","source":{"id":"1906.05876","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.05876","created_at":"2026-07-05T00:30:15Z"},{"alias_kind":"arxiv_version","alias_value":"1906.05876v1","created_at":"2026-07-05T00:30:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.05876","created_at":"2026-07-05T00:30:15Z"},{"alias_kind":"pith_short_12","alias_value":"K3F5XULMV44S","created_at":"2026-07-05T00:30:15Z"},{"alias_kind":"pith_short_16","alias_value":"K3F5XULMV44SMV4G","created_at":"2026-07-05T00:30:15Z"},{"alias_kind":"pith_short_8","alias_value":"K3F5XULM","created_at":"2026-07-05T00:30:15Z"}],"graph_snapshots":[{"event_id":"sha256:1e77d4ab05358d7ac36f82d3615d0183a2516f5c9da752e504ae0a10995a6c72","target":"graph","created_at":"2026-07-05T00:30:15Z","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/1906.05876/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Although photometric redshifts (photo-z's) are crucial ingredients for current and upcoming large-scale surveys, the high-quality spectroscopic redshifts currently available to train, validate, and test them are substantially non-representative in both magnitude and color. We investigate the nature and structure of this bias by tracking how objects from a heterogeneous training sample contribute to photo-z predictions as a function of magnitude and color, and illustrate that the underlying redshift distribution at fixed color can evolve strongly as a function of magnitude. We then test the rob","authors_text":"Alexie Leauthaud, Christopher P. Bradshaw, Crist\\'obal Sif\\'on, Daniel C. Masters, Daniel J. Eisenstein, Felipe Ardila, Joshua S. Speagle, Melanie Simet, Peter L. Capak, Rachel Mandelbaum, Song Huang, Surhud More","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-06-13T18:00:58Z","title":"Galaxy-Galaxy Lensing in HSC: Validation Tests and the Impact of Heterogeneous Spectroscopic Training Sets"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.05876","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":"sha256:0a348ca06d4109712d3d866f1b4224c7e1f553be04a6d217a1374e2d46c4aedb","target":"record","created_at":"2026-07-05T00:30:15Z","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":"e56e0efc05bf6f0f4b4c8978425b23e4d3ad9272520281ef599d98cea86b073c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-06-13T18:00:58Z","title_canon_sha256":"e4b3442172e05fcd743430f53aab3761b8f7495479a2ff1c548fd56f3ae08b17"},"schema_version":"1.0","source":{"id":"1906.05876","kind":"arxiv","version":1}},"canonical_sha256":"56cbdbd16caf39265786448417d9397932c1227f40cfd3a3f9a7773799922423","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"56cbdbd16caf39265786448417d9397932c1227f40cfd3a3f9a7773799922423","first_computed_at":"2026-07-05T00:30:15.644089Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:30:15.644089Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"EfgdMrHZBChUxPY9TaaoGUibBquX4r50etwgun570uU0kruURSh18L/Th3M1tGZpN6fZFq0kJPT9LaTSS2fLDw==","signature_status":"signed_v1","signed_at":"2026-07-05T00:30:15.644606Z","signed_message":"canonical_sha256_bytes"},"source_id":"1906.05876","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0a348ca06d4109712d3d866f1b4224c7e1f553be04a6d217a1374e2d46c4aedb","sha256:1e77d4ab05358d7ac36f82d3615d0183a2516f5c9da752e504ae0a10995a6c72"],"state_sha256":"739e9050da161c51ed9fa21b9806a5ba7744f0d4172add0a3e1ee83775383c0e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6C7P/PhSZTySJAdMAF0I9B8d/pHzxNrobGTlzGYPnA30QGlrv9Xri2W50hR2Fc5HsCxrf8tvOh9w+PQ3iv0cDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-31T12:48:42.232130Z","bundle_sha256":"21520f9fd2a60580341b638fa98a12d9549f1bcd6e0753b9e6b2b2cceebfec96"}}