{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2004:SMNOIN2AMJ6Z52PJD3SVOYSUR4","short_pith_number":"pith:SMNOIN2A","canonical_record":{"source":{"id":"astro-ph/0412093","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2004-12-03T19:54:55Z","cross_cats_sorted":[],"title_canon_sha256":"628bcb2b34449e6cb5f3bbbffafcde5c3b71600dcd8eb3a26a395214f49107bc","abstract_canon_sha256":"45218928a0712142c2e9fbed43e5eb6f70917068b9e2342b17a3bd9232302628"},"schema_version":"1.0"},"canonical_sha256":"931ae43740627d9ee9e91ee55762548f10ba20261591197bc9efda917855c968","source":{"kind":"arxiv","id":"astro-ph/0412093","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0412093","created_at":"2026-05-18T02:40:25Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0412093v2","created_at":"2026-05-18T02:40:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0412093","created_at":"2026-05-18T02:40:25Z"},{"alias_kind":"pith_short_12","alias_value":"SMNOIN2AMJ6Z","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"SMNOIN2AMJ6Z52PJ","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"SMNOIN2A","created_at":"2026-05-18T12:25:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2004:SMNOIN2AMJ6Z52PJD3SVOYSUR4","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0412093","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2004-12-03T19:54:55Z","cross_cats_sorted":[],"title_canon_sha256":"628bcb2b34449e6cb5f3bbbffafcde5c3b71600dcd8eb3a26a395214f49107bc","abstract_canon_sha256":"45218928a0712142c2e9fbed43e5eb6f70917068b9e2342b17a3bd9232302628"},"schema_version":"1.0"},"canonical_sha256":"931ae43740627d9ee9e91ee55762548f10ba20261591197bc9efda917855c968","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:40:25.983157Z","signature_b64":"FURY9wi1xicjmbKUO82Tfi1ATjMnSjVBQFt9hUaT16+D82GmfzBZWy/8rsM49J26xn9fKNN5josQ4fuv2EvJBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"931ae43740627d9ee9e91ee55762548f10ba20261591197bc9efda917855c968","last_reissued_at":"2026-05-18T02:40:25.982744Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:40:25.982744Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0412093","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":"2026-05-18T02:40:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GOmV+Z7Ee8loDOx8CaLAHndjXDMEayEhycCxj8H/kzz09Gg1mNL8nNZIIv5xIpAfuqCMpcmRcMmEyRhKOlYODA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T20:16:56.536154Z"},"content_sha256":"50712cbc8cdfe33beda0fbec3fb1b299bb660a228b101b3cbef892386f2e3c73","schema_version":"1.0","event_id":"sha256:50712cbc8cdfe33beda0fbec3fb1b299bb660a228b101b3cbef892386f2e3c73"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2004:SMNOIN2AMJ6Z52PJD3SVOYSUR4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Confirmation of Errors in Hipparcos Parallaxes from HST/FGS Astrometry of the Pleiades","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Barbara McArthur, Burton F. Jones (Lick Observatory, David R. Soderblom, Ed Nelan (Space Telescope Science Institute), G. Fritz Benedict, Ivan Ramirez, University of California), University of Texas), William Spiesman (McDonald Observatory","submitted_at":"2004-12-03T19:54:55Z","abstract_excerpt":"We present absolute trigonometric parallaxes and relative proper motions for three members of the Pleiades star cluster, obtained with HST's Fine Guidance Sensor 1r, a white-light interferometer. We estimate spectral types and luminosity classes of the stars comprising the astrometric reference frame from R \\approx 2,000 spectra, VJHK photometry, and reduced proper motions. From these we derive estimates of absolute parallaxes and introduce them into our model as observations with error. We constrain the three cluster members to have a 1 sigma dispersion in distance less than 6.4 pc, and find "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0412093","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":"2026-05-18T02:40:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ne6i3qBx4jI/j5URQQmgyXJvoNfD6VLOyNj8ySqso3kikhpn/V6gV00wN2rRXcD4hVusTrzO4jwcH+DuQFAoDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T20:16:56.536816Z"},"content_sha256":"c9f154e8d10f854ab5b31c443440f64b6b215ed5830b73012f78104df4be6d50","schema_version":"1.0","event_id":"sha256:c9f154e8d10f854ab5b31c443440f64b6b215ed5830b73012f78104df4be6d50"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SMNOIN2AMJ6Z52PJD3SVOYSUR4/bundle.json","state_url":"https://pith.science/pith/SMNOIN2AMJ6Z52PJD3SVOYSUR4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SMNOIN2AMJ6Z52PJD3SVOYSUR4/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":"2026-06-07T20:16:56Z","links":{"resolver":"https://pith.science/pith/SMNOIN2AMJ6Z52PJD3SVOYSUR4","bundle":"https://pith.science/pith/SMNOIN2AMJ6Z52PJD3SVOYSUR4/bundle.json","state":"https://pith.science/pith/SMNOIN2AMJ6Z52PJD3SVOYSUR4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SMNOIN2AMJ6Z52PJD3SVOYSUR4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2004:SMNOIN2AMJ6Z52PJD3SVOYSUR4","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":"45218928a0712142c2e9fbed43e5eb6f70917068b9e2342b17a3bd9232302628","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2004-12-03T19:54:55Z","title_canon_sha256":"628bcb2b34449e6cb5f3bbbffafcde5c3b71600dcd8eb3a26a395214f49107bc"},"schema_version":"1.0","source":{"id":"astro-ph/0412093","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0412093","created_at":"2026-05-18T02:40:25Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0412093v2","created_at":"2026-05-18T02:40:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0412093","created_at":"2026-05-18T02:40:25Z"},{"alias_kind":"pith_short_12","alias_value":"SMNOIN2AMJ6Z","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"SMNOIN2AMJ6Z52PJ","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"SMNOIN2A","created_at":"2026-05-18T12:25:52Z"}],"graph_snapshots":[{"event_id":"sha256:c9f154e8d10f854ab5b31c443440f64b6b215ed5830b73012f78104df4be6d50","target":"graph","created_at":"2026-05-18T02:40:25Z","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":"We present absolute trigonometric parallaxes and relative proper motions for three members of the Pleiades star cluster, obtained with HST's Fine Guidance Sensor 1r, a white-light interferometer. We estimate spectral types and luminosity classes of the stars comprising the astrometric reference frame from R \\approx 2,000 spectra, VJHK photometry, and reduced proper motions. From these we derive estimates of absolute parallaxes and introduce them into our model as observations with error. We constrain the three cluster members to have a 1 sigma dispersion in distance less than 6.4 pc, and find ","authors_text":"Barbara McArthur, Burton F. Jones (Lick Observatory, David R. Soderblom, Ed Nelan (Space Telescope Science Institute), G. Fritz Benedict, Ivan Ramirez, University of California), University of Texas), William Spiesman (McDonald Observatory","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2004-12-03T19:54:55Z","title":"Confirmation of Errors in Hipparcos Parallaxes from HST/FGS Astrometry of the Pleiades"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0412093","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":"sha256:50712cbc8cdfe33beda0fbec3fb1b299bb660a228b101b3cbef892386f2e3c73","target":"record","created_at":"2026-05-18T02:40:25Z","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":"45218928a0712142c2e9fbed43e5eb6f70917068b9e2342b17a3bd9232302628","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2004-12-03T19:54:55Z","title_canon_sha256":"628bcb2b34449e6cb5f3bbbffafcde5c3b71600dcd8eb3a26a395214f49107bc"},"schema_version":"1.0","source":{"id":"astro-ph/0412093","kind":"arxiv","version":2}},"canonical_sha256":"931ae43740627d9ee9e91ee55762548f10ba20261591197bc9efda917855c968","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"931ae43740627d9ee9e91ee55762548f10ba20261591197bc9efda917855c968","first_computed_at":"2026-05-18T02:40:25.982744Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:40:25.982744Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"FURY9wi1xicjmbKUO82Tfi1ATjMnSjVBQFt9hUaT16+D82GmfzBZWy/8rsM49J26xn9fKNN5josQ4fuv2EvJBg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:40:25.983157Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0412093","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:50712cbc8cdfe33beda0fbec3fb1b299bb660a228b101b3cbef892386f2e3c73","sha256:c9f154e8d10f854ab5b31c443440f64b6b215ed5830b73012f78104df4be6d50"],"state_sha256":"507540e17c996f713e0fbcf442a59dd3be983fcbabc70bdb7cf54e2401328a5b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nxr4FyLsx7tjC99fijI3foH9J3q0Lk3LpF7cb5uqblyaWIHwGnBcSfatpNFN1r9oDW0rTrO8i6btx6PEToWJAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T20:16:56.540464Z","bundle_sha256":"210f327b939ec03f9a76ba999f73c9b6a4e922080302ee495ddaab86c939c914"}}