{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:GSPHQZDDSUXA5BYR5ZHXJGRZRR","short_pith_number":"pith:GSPHQZDD","canonical_record":{"source":{"id":"1512.03658","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-12-11T14:31:42Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"b95ee4efc49878ebc6e8f93c29d7f692742dad7330574634428c8d6355794d88","abstract_canon_sha256":"f4e0cc1faaad4596c68f976c36ad7a85254ae8bde34752682fcbfd9354921aa3"},"schema_version":"1.0"},"canonical_sha256":"349e786463952e0e8711ee4f749a398c550c6d72cf09a018f18e9db01c4b96a2","source":{"kind":"arxiv","id":"1512.03658","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.03658","created_at":"2026-05-18T01:01:28Z"},{"alias_kind":"arxiv_version","alias_value":"1512.03658v1","created_at":"2026-05-18T01:01:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.03658","created_at":"2026-05-18T01:01:28Z"},{"alias_kind":"pith_short_12","alias_value":"GSPHQZDDSUXA","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_16","alias_value":"GSPHQZDDSUXA5BYR","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_8","alias_value":"GSPHQZDD","created_at":"2026-05-18T12:29:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:GSPHQZDDSUXA5BYR5ZHXJGRZRR","target":"record","payload":{"canonical_record":{"source":{"id":"1512.03658","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-12-11T14:31:42Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"b95ee4efc49878ebc6e8f93c29d7f692742dad7330574634428c8d6355794d88","abstract_canon_sha256":"f4e0cc1faaad4596c68f976c36ad7a85254ae8bde34752682fcbfd9354921aa3"},"schema_version":"1.0"},"canonical_sha256":"349e786463952e0e8711ee4f749a398c550c6d72cf09a018f18e9db01c4b96a2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:01:28.891536Z","signature_b64":"T1Z2joVe1iRZv+F9nS5jwf7VJyA+HulFfYEiym37Um5e+Gp32tjd7sCBEc+1UyEgtbBdIBNnb1I5MxYQVIXTDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"349e786463952e0e8711ee4f749a398c550c6d72cf09a018f18e9db01c4b96a2","last_reissued_at":"2026-05-18T01:01:28.891057Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:01:28.891057Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1512.03658","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":"2026-05-18T01:01:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ccKAMblxMVTk+x0Kn5Du8L/i/FERR9unhMHJtfMFqg4brUUHnTAi6XZ0ih1qJYbXTUiE484kGIa+O+gI7EffBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-04T22:18:14.763590Z"},"content_sha256":"7b39f11013e292ed2548ee9dae8671c1f370907e0ac5da3131e97f4edd9af310","schema_version":"1.0","event_id":"sha256:7b39f11013e292ed2548ee9dae8671c1f370907e0ac5da3131e97f4edd9af310"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:GSPHQZDDSUXA5BYR5ZHXJGRZRR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Gaia","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.GA","authors_text":"C. Cacciari, E. Pancino, M. Bellazzini","submitted_at":"2015-12-11T14:31:42Z","abstract_excerpt":"A review of the Gaia mission and its science performance after one year of operations will be presented, and the contribution to reconstructing the history of the Milky Way will be outlined."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.03658","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":""},"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":"2026-05-18T01:01:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uCKIVYG2QUbbVgs7goPHHMv4I5z2kGxOcfeePzegPHAKzz4MM20BLn2lbQAcgaCVbEQVSfoEthnCsRHu7f6wBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-04T22:18:14.763920Z"},"content_sha256":"2df4ad59f82bf947dc1876321573488a98fdc359523dacc66571b46cd7012155","schema_version":"1.0","event_id":"sha256:2df4ad59f82bf947dc1876321573488a98fdc359523dacc66571b46cd7012155"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GSPHQZDDSUXA5BYR5ZHXJGRZRR/bundle.json","state_url":"https://pith.science/pith/GSPHQZDDSUXA5BYR5ZHXJGRZRR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GSPHQZDDSUXA5BYR5ZHXJGRZRR/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":"2026-07-04T22:18:14Z","links":{"resolver":"https://pith.science/pith/GSPHQZDDSUXA5BYR5ZHXJGRZRR","bundle":"https://pith.science/pith/GSPHQZDDSUXA5BYR5ZHXJGRZRR/bundle.json","state":"https://pith.science/pith/GSPHQZDDSUXA5BYR5ZHXJGRZRR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GSPHQZDDSUXA5BYR5ZHXJGRZRR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:GSPHQZDDSUXA5BYR5ZHXJGRZRR","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":"f4e0cc1faaad4596c68f976c36ad7a85254ae8bde34752682fcbfd9354921aa3","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-12-11T14:31:42Z","title_canon_sha256":"b95ee4efc49878ebc6e8f93c29d7f692742dad7330574634428c8d6355794d88"},"schema_version":"1.0","source":{"id":"1512.03658","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.03658","created_at":"2026-05-18T01:01:28Z"},{"alias_kind":"arxiv_version","alias_value":"1512.03658v1","created_at":"2026-05-18T01:01:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.03658","created_at":"2026-05-18T01:01:28Z"},{"alias_kind":"pith_short_12","alias_value":"GSPHQZDDSUXA","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_16","alias_value":"GSPHQZDDSUXA5BYR","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_8","alias_value":"GSPHQZDD","created_at":"2026-05-18T12:29:22Z"}],"graph_snapshots":[{"event_id":"sha256:2df4ad59f82bf947dc1876321573488a98fdc359523dacc66571b46cd7012155","target":"graph","created_at":"2026-05-18T01:01:28Z","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":"A review of the Gaia mission and its science performance after one year of operations will be presented, and the contribution to reconstructing the history of the Milky Way will be outlined.","authors_text":"C. Cacciari, E. Pancino, M. Bellazzini","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-12-11T14:31:42Z","title":"Gaia"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.03658","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":"sha256:7b39f11013e292ed2548ee9dae8671c1f370907e0ac5da3131e97f4edd9af310","target":"record","created_at":"2026-05-18T01:01:28Z","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":"f4e0cc1faaad4596c68f976c36ad7a85254ae8bde34752682fcbfd9354921aa3","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-12-11T14:31:42Z","title_canon_sha256":"b95ee4efc49878ebc6e8f93c29d7f692742dad7330574634428c8d6355794d88"},"schema_version":"1.0","source":{"id":"1512.03658","kind":"arxiv","version":1}},"canonical_sha256":"349e786463952e0e8711ee4f749a398c550c6d72cf09a018f18e9db01c4b96a2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"349e786463952e0e8711ee4f749a398c550c6d72cf09a018f18e9db01c4b96a2","first_computed_at":"2026-05-18T01:01:28.891057Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:01:28.891057Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"T1Z2joVe1iRZv+F9nS5jwf7VJyA+HulFfYEiym37Um5e+Gp32tjd7sCBEc+1UyEgtbBdIBNnb1I5MxYQVIXTDg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:01:28.891536Z","signed_message":"canonical_sha256_bytes"},"source_id":"1512.03658","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7b39f11013e292ed2548ee9dae8671c1f370907e0ac5da3131e97f4edd9af310","sha256:2df4ad59f82bf947dc1876321573488a98fdc359523dacc66571b46cd7012155"],"state_sha256":"7c77db8d462ef8f36830cea6be1f4dadb8f9ba37408bd58ca1db8482abe4f548"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pK26FCvUSyXg1E/CSQ2F7qvB0HQetcdzjakyR+HFOJ50ufnNQNrY2VXMD8gnjUjt44De/4fWpOkoReM8gUMhCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-04T22:18:14.765751Z","bundle_sha256":"c0ff562c88c12ccf3fa08f267c3fffce542c2acd61fcc2b557296bfaf03deff1"}}