{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:67PKP5PRDDMJTPOWMGZHH2YOYR","short_pith_number":"pith:67PKP5PR","canonical_record":{"source":{"id":"2012.01742","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2020-12-03T07:50:10Z","cross_cats_sorted":[],"title_canon_sha256":"b7b398461a5bc547ff0f245a48303d6c7f3ae0d9e551e61327d759a0dc853b4f","abstract_canon_sha256":"520488e0852f7d37b82b43cd99890fa74f7e8a3c9d7165b6576e7e833a2d2f40"},"schema_version":"1.0"},"canonical_sha256":"f7dea7f5f118d899bdd661b273eb0ec443065cdc888290a2da617cc01fbc7067","source":{"kind":"arxiv","id":"2012.01742","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2012.01742","created_at":"2026-07-05T02:35:22Z"},{"alias_kind":"arxiv_version","alias_value":"2012.01742v2","created_at":"2026-07-05T02:35:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2012.01742","created_at":"2026-07-05T02:35:22Z"},{"alias_kind":"pith_short_12","alias_value":"67PKP5PRDDMJ","created_at":"2026-07-05T02:35:22Z"},{"alias_kind":"pith_short_16","alias_value":"67PKP5PRDDMJTPOW","created_at":"2026-07-05T02:35:22Z"},{"alias_kind":"pith_short_8","alias_value":"67PKP5PR","created_at":"2026-07-05T02:35:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:67PKP5PRDDMJTPOWMGZHH2YOYR","target":"record","payload":{"canonical_record":{"source":{"id":"2012.01742","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2020-12-03T07:50:10Z","cross_cats_sorted":[],"title_canon_sha256":"b7b398461a5bc547ff0f245a48303d6c7f3ae0d9e551e61327d759a0dc853b4f","abstract_canon_sha256":"520488e0852f7d37b82b43cd99890fa74f7e8a3c9d7165b6576e7e833a2d2f40"},"schema_version":"1.0"},"canonical_sha256":"f7dea7f5f118d899bdd661b273eb0ec443065cdc888290a2da617cc01fbc7067","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:35:22.846474Z","signature_b64":"b/NKV44jxwoXlY5bYPM5y03EX+vyM+DKhtURsslkTiGlaMKtgDk44FwEAIzNmGw3ruDUKa4Ug47w1o05cleEDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f7dea7f5f118d899bdd661b273eb0ec443065cdc888290a2da617cc01fbc7067","last_reissued_at":"2026-07-05T02:35:22.845899Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:35:22.845899Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2012.01742","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":"2026-07-05T02:35:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1Xfe4wgdYYp65lGBInui4vJl14KxHu3HMLTqXWcTwQqLCYQJbPSCeoYIBTzBDLPG/cbFBFklNCxDUybJPPBoBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-18T14:55:38.340196Z"},"content_sha256":"32eb7f1dd9ead5eee02f17d72d99a2eca6c495004b210f5df10e3eb2ae2f7837","schema_version":"1.0","event_id":"sha256:32eb7f1dd9ead5eee02f17d72d99a2eca6c495004b210f5df10e3eb2ae2f7837"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:67PKP5PRDDMJTPOWMGZHH2YOYR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Gaia Early Data Release 3: Parallax bias versus magnitude, colour, and position","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"A. Bombrun, A. de Torres, C.A. Stephenson, D. Hobbs, E. Gerlach, F. van Leeuwen, H. Steidelm\\\"uller, J. Hern\\'andez, L. Lindegren, M. Biermann, M. Ramos-Lerate, P.J. McMillan, R. Geyer, S.A. Klioner, T. Hilger, U. Bastian, U. Lammers","submitted_at":"2020-12-03T07:50:10Z","abstract_excerpt":"Gaia Early Data Release 3 (Gaia EDR3) gives trigonometric parallaxes for nearly 1.5 billion sources. Inspection of the EDR3 data for sources identified as quasars reveals that their parallaxes are biased, that is systematically offset from the expected distribution around zero, by a few tens of microarcsec. We attempt to map the main dependencies of the parallax bias in EDR3. In principle this could provide a recipe for correcting the EDR3 parallaxes. For faint sources the quasars provide the most direct way to estimate parallax bias. In order to extend this to brighter sources and a broader r"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2012.01742","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/2012.01742/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":"2026-07-05T02:35:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gHGdeT4UXn7oZ9fEilkHAQJ4nKcXc/U0YCq1qV5YX+gynE6gR+f2pO5/cSmekT5Ig/diOVb8gNqsFeW+9E2WDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-18T14:55:38.340589Z"},"content_sha256":"5f1461079cf1c4e97c26489ddd95ebfa8fc61d554c788fed7ddec557020a5155","schema_version":"1.0","event_id":"sha256:5f1461079cf1c4e97c26489ddd95ebfa8fc61d554c788fed7ddec557020a5155"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/67PKP5PRDDMJTPOWMGZHH2YOYR/bundle.json","state_url":"https://pith.science/pith/67PKP5PRDDMJTPOWMGZHH2YOYR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/67PKP5PRDDMJTPOWMGZHH2YOYR/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":"2026-07-18T14:55:38Z","links":{"resolver":"https://pith.science/pith/67PKP5PRDDMJTPOWMGZHH2YOYR","bundle":"https://pith.science/pith/67PKP5PRDDMJTPOWMGZHH2YOYR/bundle.json","state":"https://pith.science/pith/67PKP5PRDDMJTPOWMGZHH2YOYR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/67PKP5PRDDMJTPOWMGZHH2YOYR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:67PKP5PRDDMJTPOWMGZHH2YOYR","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":"520488e0852f7d37b82b43cd99890fa74f7e8a3c9d7165b6576e7e833a2d2f40","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2020-12-03T07:50:10Z","title_canon_sha256":"b7b398461a5bc547ff0f245a48303d6c7f3ae0d9e551e61327d759a0dc853b4f"},"schema_version":"1.0","source":{"id":"2012.01742","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2012.01742","created_at":"2026-07-05T02:35:22Z"},{"alias_kind":"arxiv_version","alias_value":"2012.01742v2","created_at":"2026-07-05T02:35:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2012.01742","created_at":"2026-07-05T02:35:22Z"},{"alias_kind":"pith_short_12","alias_value":"67PKP5PRDDMJ","created_at":"2026-07-05T02:35:22Z"},{"alias_kind":"pith_short_16","alias_value":"67PKP5PRDDMJTPOW","created_at":"2026-07-05T02:35:22Z"},{"alias_kind":"pith_short_8","alias_value":"67PKP5PR","created_at":"2026-07-05T02:35:22Z"}],"graph_snapshots":[{"event_id":"sha256:5f1461079cf1c4e97c26489ddd95ebfa8fc61d554c788fed7ddec557020a5155","target":"graph","created_at":"2026-07-05T02:35:22Z","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/2012.01742/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Gaia Early Data Release 3 (Gaia EDR3) gives trigonometric parallaxes for nearly 1.5 billion sources. Inspection of the EDR3 data for sources identified as quasars reveals that their parallaxes are biased, that is systematically offset from the expected distribution around zero, by a few tens of microarcsec. We attempt to map the main dependencies of the parallax bias in EDR3. In principle this could provide a recipe for correcting the EDR3 parallaxes. For faint sources the quasars provide the most direct way to estimate parallax bias. In order to extend this to brighter sources and a broader r","authors_text":"A. Bombrun, A. de Torres, C.A. Stephenson, D. Hobbs, E. Gerlach, F. van Leeuwen, H. Steidelm\\\"uller, J. Hern\\'andez, L. Lindegren, M. Biermann, M. Ramos-Lerate, P.J. McMillan, R. Geyer, S.A. Klioner, T. Hilger, U. Bastian, U. Lammers","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2020-12-03T07:50:10Z","title":"Gaia Early Data Release 3: Parallax bias versus magnitude, colour, and position"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2012.01742","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":"sha256:32eb7f1dd9ead5eee02f17d72d99a2eca6c495004b210f5df10e3eb2ae2f7837","target":"record","created_at":"2026-07-05T02:35:22Z","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":"520488e0852f7d37b82b43cd99890fa74f7e8a3c9d7165b6576e7e833a2d2f40","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2020-12-03T07:50:10Z","title_canon_sha256":"b7b398461a5bc547ff0f245a48303d6c7f3ae0d9e551e61327d759a0dc853b4f"},"schema_version":"1.0","source":{"id":"2012.01742","kind":"arxiv","version":2}},"canonical_sha256":"f7dea7f5f118d899bdd661b273eb0ec443065cdc888290a2da617cc01fbc7067","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f7dea7f5f118d899bdd661b273eb0ec443065cdc888290a2da617cc01fbc7067","first_computed_at":"2026-07-05T02:35:22.845899Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:35:22.845899Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"b/NKV44jxwoXlY5bYPM5y03EX+vyM+DKhtURsslkTiGlaMKtgDk44FwEAIzNmGw3ruDUKa4Ug47w1o05cleEDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T02:35:22.846474Z","signed_message":"canonical_sha256_bytes"},"source_id":"2012.01742","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:32eb7f1dd9ead5eee02f17d72d99a2eca6c495004b210f5df10e3eb2ae2f7837","sha256:5f1461079cf1c4e97c26489ddd95ebfa8fc61d554c788fed7ddec557020a5155"],"state_sha256":"7c734608ae239e7d2f4004aee6d292b0ca7d1c0531ccc936edb2306d7fa9b4e0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"27ZmjjST73dng3FNoRrKn5yL8nxSWPAAyvvPrayEjAMhvmE8FAIzNtOQT/lelYv/WKkzmzB7wfyrLCAiaJWpBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-18T14:55:38.343025Z","bundle_sha256":"539ca3fa8fc4a4ac50045fdf5563061c4af1ba60199825771219b624e31ec86b"}}