{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:4A32LKG2RBPQZCPSPYGGEVYNJT","short_pith_number":"pith:4A32LKG2","canonical_record":{"source":{"id":"1804.09376","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-04-25T06:25:26Z","cross_cats_sorted":[],"title_canon_sha256":"efd611a21b6dcd979d03026c4be90e685dab5de7ea01cd4e08d745325b30d142","abstract_canon_sha256":"a32709a7e677e0c5fd709e1137081402c6c2aad3b50e0d3544c6888fa57baafe"},"schema_version":"1.0"},"canonical_sha256":"e037a5a8da885f0c89f27e0c62570d4ce293b029f49dab71f9df41ca54deaf82","source":{"kind":"arxiv","id":"1804.09376","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.09376","created_at":"2026-05-18T00:08:07Z"},{"alias_kind":"arxiv_version","alias_value":"1804.09376v2","created_at":"2026-05-18T00:08:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.09376","created_at":"2026-05-18T00:08:07Z"},{"alias_kind":"pith_short_12","alias_value":"4A32LKG2RBPQ","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_16","alias_value":"4A32LKG2RBPQZCPS","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_8","alias_value":"4A32LKG2","created_at":"2026-05-18T12:32:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:4A32LKG2RBPQZCPSPYGGEVYNJT","target":"record","payload":{"canonical_record":{"source":{"id":"1804.09376","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-04-25T06:25:26Z","cross_cats_sorted":[],"title_canon_sha256":"efd611a21b6dcd979d03026c4be90e685dab5de7ea01cd4e08d745325b30d142","abstract_canon_sha256":"a32709a7e677e0c5fd709e1137081402c6c2aad3b50e0d3544c6888fa57baafe"},"schema_version":"1.0"},"canonical_sha256":"e037a5a8da885f0c89f27e0c62570d4ce293b029f49dab71f9df41ca54deaf82","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:08:07.360833Z","signature_b64":"fiZutTF6lanAhMulYAAbCiqbTPyYfjlCeEDlHp7rwkkh4IXi+eC3aIuYj/HP1U7GznHoilHcdFS5mVL8jFVpDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e037a5a8da885f0c89f27e0c62570d4ce293b029f49dab71f9df41ca54deaf82","last_reissued_at":"2026-05-18T00:08:07.360383Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:08:07.360383Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1804.09376","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":"2026-05-18T00:08:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5bks5JPZASrnccGufJzNT8G/b4JmEXrEV2mUbymFRsz40+cj4hCf5cplKMJZ6zSwSkZe0U/mUEwb6R3PruA8Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T06:53:13.149899Z"},"content_sha256":"09567db5d86dec64ebd9254384fd66d3e07ee0e7604bb7887b72455afe4a1f84","schema_version":"1.0","event_id":"sha256:09567db5d86dec64ebd9254384fd66d3e07ee0e7604bb7887b72455afe4a1f84"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:4A32LKG2RBPQZCPSPYGGEVYNJT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Gaia Data Release 2: using Gaia parallaxes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"A. Castro-Ginard, A.G.A. Brown, C.A.L. Bailer-Jones, C. Babusiaux, F. Arenou, H.E. Delgado, J. de Bruijne, L.M. Sarro, T. Prusti, X. Luri","submitted_at":"2018-04-25T06:25:26Z","abstract_excerpt":"The second Gaia data release (GDR2) provides precise five-parameter astrometric data (positions, proper motions and parallaxes) for an unprecedented amount of sources (more than $1.3$ billion, mostly stars). The use of this wealth of astrometric data comes with a specific challenge: how does one properly infer from these data the astrophysical parameters of interest?\n  The main - but not only - focus of this paper is the issue of the estimation of distances from parallaxes, possibly combined with other information. We start with a critical review of the methods traditionally used to obtain dis"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.09376","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":""},"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":"2026-05-18T00:08:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Bf1R0d3ZNShFgaeTsd+CrOjQISsNC3r7XG8c2RS2ryuQNaMcu/LPjs0ymf4deLNxpeBN/tCtz6+7X5lWMblEAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T06:53:13.150612Z"},"content_sha256":"262dcb199492b29986dfff2717daf484091ba5c42486b82bf72573588418824a","schema_version":"1.0","event_id":"sha256:262dcb199492b29986dfff2717daf484091ba5c42486b82bf72573588418824a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4A32LKG2RBPQZCPSPYGGEVYNJT/bundle.json","state_url":"https://pith.science/pith/4A32LKG2RBPQZCPSPYGGEVYNJT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4A32LKG2RBPQZCPSPYGGEVYNJT/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":"2026-05-26T06:53:13Z","links":{"resolver":"https://pith.science/pith/4A32LKG2RBPQZCPSPYGGEVYNJT","bundle":"https://pith.science/pith/4A32LKG2RBPQZCPSPYGGEVYNJT/bundle.json","state":"https://pith.science/pith/4A32LKG2RBPQZCPSPYGGEVYNJT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4A32LKG2RBPQZCPSPYGGEVYNJT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:4A32LKG2RBPQZCPSPYGGEVYNJT","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":"a32709a7e677e0c5fd709e1137081402c6c2aad3b50e0d3544c6888fa57baafe","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-04-25T06:25:26Z","title_canon_sha256":"efd611a21b6dcd979d03026c4be90e685dab5de7ea01cd4e08d745325b30d142"},"schema_version":"1.0","source":{"id":"1804.09376","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.09376","created_at":"2026-05-18T00:08:07Z"},{"alias_kind":"arxiv_version","alias_value":"1804.09376v2","created_at":"2026-05-18T00:08:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.09376","created_at":"2026-05-18T00:08:07Z"},{"alias_kind":"pith_short_12","alias_value":"4A32LKG2RBPQ","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_16","alias_value":"4A32LKG2RBPQZCPS","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_8","alias_value":"4A32LKG2","created_at":"2026-05-18T12:32:05Z"}],"graph_snapshots":[{"event_id":"sha256:262dcb199492b29986dfff2717daf484091ba5c42486b82bf72573588418824a","target":"graph","created_at":"2026-05-18T00:08:07Z","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":"The second Gaia data release (GDR2) provides precise five-parameter astrometric data (positions, proper motions and parallaxes) for an unprecedented amount of sources (more than $1.3$ billion, mostly stars). The use of this wealth of astrometric data comes with a specific challenge: how does one properly infer from these data the astrophysical parameters of interest?\n  The main - but not only - focus of this paper is the issue of the estimation of distances from parallaxes, possibly combined with other information. We start with a critical review of the methods traditionally used to obtain dis","authors_text":"A. Castro-Ginard, A.G.A. Brown, C.A.L. Bailer-Jones, C. Babusiaux, F. Arenou, H.E. Delgado, J. de Bruijne, L.M. Sarro, T. Prusti, X. Luri","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-04-25T06:25:26Z","title":"Gaia Data Release 2: using Gaia parallaxes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.09376","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":"sha256:09567db5d86dec64ebd9254384fd66d3e07ee0e7604bb7887b72455afe4a1f84","target":"record","created_at":"2026-05-18T00:08:07Z","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":"a32709a7e677e0c5fd709e1137081402c6c2aad3b50e0d3544c6888fa57baafe","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-04-25T06:25:26Z","title_canon_sha256":"efd611a21b6dcd979d03026c4be90e685dab5de7ea01cd4e08d745325b30d142"},"schema_version":"1.0","source":{"id":"1804.09376","kind":"arxiv","version":2}},"canonical_sha256":"e037a5a8da885f0c89f27e0c62570d4ce293b029f49dab71f9df41ca54deaf82","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e037a5a8da885f0c89f27e0c62570d4ce293b029f49dab71f9df41ca54deaf82","first_computed_at":"2026-05-18T00:08:07.360383Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:08:07.360383Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fiZutTF6lanAhMulYAAbCiqbTPyYfjlCeEDlHp7rwkkh4IXi+eC3aIuYj/HP1U7GznHoilHcdFS5mVL8jFVpDw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:08:07.360833Z","signed_message":"canonical_sha256_bytes"},"source_id":"1804.09376","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:09567db5d86dec64ebd9254384fd66d3e07ee0e7604bb7887b72455afe4a1f84","sha256:262dcb199492b29986dfff2717daf484091ba5c42486b82bf72573588418824a"],"state_sha256":"eb8518c351524d0d4eb32349649c831c03beb30954d739e97fab5b2475bf9731"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ljGhBxtiXJTfVCWincDMjJ8S0F2LKw4ltvFkK9AjRI070cuKA1HMYIFFxleNMVV78S2kzBzxbqMS9nZ90yr9Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T06:53:13.154592Z","bundle_sha256":"0f1011f1127952aabe956e05360e002fe9de4ef83d9486fb5bae0bb789c581a6"}}