{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:ZXXDR5GHAFLAKPCZQRCUQS7I6M","short_pith_number":"pith:ZXXDR5GH","canonical_record":{"source":{"id":"2103.00138","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-02-27T06:23:24Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"d4fa5bdf76c6e73604134a883ffcdacbe438b8e63d597d18c61c03b822a7806d","abstract_canon_sha256":"161800d2a423d66bddf536501cd9056fd8d5335d867c6bbf284bc3898164975d"},"schema_version":"1.0"},"canonical_sha256":"cdee38f4c70156053c598445484be8f31a8a657b0598914a798938908d2428fe","source":{"kind":"arxiv","id":"2103.00138","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2103.00138","created_at":"2026-07-05T02:33:29Z"},{"alias_kind":"arxiv_version","alias_value":"2103.00138v1","created_at":"2026-07-05T02:33:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2103.00138","created_at":"2026-07-05T02:33:29Z"},{"alias_kind":"pith_short_12","alias_value":"ZXXDR5GHAFLA","created_at":"2026-07-05T02:33:29Z"},{"alias_kind":"pith_short_16","alias_value":"ZXXDR5GHAFLAKPCZ","created_at":"2026-07-05T02:33:29Z"},{"alias_kind":"pith_short_8","alias_value":"ZXXDR5GH","created_at":"2026-07-05T02:33:29Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:ZXXDR5GHAFLAKPCZQRCUQS7I6M","target":"record","payload":{"canonical_record":{"source":{"id":"2103.00138","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-02-27T06:23:24Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"d4fa5bdf76c6e73604134a883ffcdacbe438b8e63d597d18c61c03b822a7806d","abstract_canon_sha256":"161800d2a423d66bddf536501cd9056fd8d5335d867c6bbf284bc3898164975d"},"schema_version":"1.0"},"canonical_sha256":"cdee38f4c70156053c598445484be8f31a8a657b0598914a798938908d2428fe","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:33:29.892688Z","signature_b64":"1onEmh1sp3JClsxSsoRKn1PIUyCV9M21e+SVkjULsgOEFnMlY9BTTfxr/zLmeFkhtCII0uRBzH6EMKhJ3qAECQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cdee38f4c70156053c598445484be8f31a8a657b0598914a798938908d2428fe","last_reissued_at":"2026-07-05T02:33:29.892216Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:33:29.892216Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2103.00138","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":"2026-07-05T02:33:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tAUa2QRdFvMgi/mpUn/EhAWXaf83qSStOcK5/6vL3Fu+u2mFFN4RaJBhSBDba0+n38fltQkRn4mva2NQQsa5Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T16:41:46.257641Z"},"content_sha256":"a67da3f287a749099c8fc710a3d8d343a3d37630e100a04ded74001bcb8e8201","schema_version":"1.0","event_id":"sha256:a67da3f287a749099c8fc710a3d8d343a3d37630e100a04ded74001bcb8e8201"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:ZXXDR5GHAFLAKPCZQRCUQS7I6M","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Geometric Distances of Quasars Measured by Spectroastrometry and Reverberation Mapping:Monte Carlo Simulations","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"Jian-Min Wang, Pu Du, Yan-Rong Li, Yu-Yang Songsheng","submitted_at":"2021-02-27T06:23:24Z","abstract_excerpt":"Recently, GRAVITY onboard the Very Large Telescope Interferometer (VLTI) first spatially resolved the structure of the quasar 3C 273 with an unprecedented resolution of $\\sim 10\\mu$as. A new method of measuring parallax distances has been successfully applied to the quasar through joint analysis of spectroastrometry (SA) and reverberation mapping (RM) observation of its broad line region (BLR). The uncertainty of this SA and RM (SARM) measurement is about $16\\%$ from real data, showing its great potential as a powerful tool for precision cosmology. In this paper, we carry out detailed analyses"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2103.00138","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/2103.00138/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":"2026-07-05T02:33:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vjst1d1wbQEWElM/LpreK2fJo+NV1BKxQeoGcRVCRmeJuoGz9ueeiSjLCnwjfT50u3Uc0WlR1nry6gjlk9tfAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T16:41:46.258190Z"},"content_sha256":"5e25cbabce7c0f48dbd79bc4fb44c37ce92f9a5ab78b6b4880e1f583f5924b76","schema_version":"1.0","event_id":"sha256:5e25cbabce7c0f48dbd79bc4fb44c37ce92f9a5ab78b6b4880e1f583f5924b76"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZXXDR5GHAFLAKPCZQRCUQS7I6M/bundle.json","state_url":"https://pith.science/pith/ZXXDR5GHAFLAKPCZQRCUQS7I6M/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZXXDR5GHAFLAKPCZQRCUQS7I6M/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":"2026-08-17T16:41:46Z","links":{"resolver":"https://pith.science/pith/ZXXDR5GHAFLAKPCZQRCUQS7I6M","bundle":"https://pith.science/pith/ZXXDR5GHAFLAKPCZQRCUQS7I6M/bundle.json","state":"https://pith.science/pith/ZXXDR5GHAFLAKPCZQRCUQS7I6M/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZXXDR5GHAFLAKPCZQRCUQS7I6M/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:ZXXDR5GHAFLAKPCZQRCUQS7I6M","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":"161800d2a423d66bddf536501cd9056fd8d5335d867c6bbf284bc3898164975d","cross_cats_sorted":["astro-ph.CO"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-02-27T06:23:24Z","title_canon_sha256":"d4fa5bdf76c6e73604134a883ffcdacbe438b8e63d597d18c61c03b822a7806d"},"schema_version":"1.0","source":{"id":"2103.00138","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2103.00138","created_at":"2026-07-05T02:33:29Z"},{"alias_kind":"arxiv_version","alias_value":"2103.00138v1","created_at":"2026-07-05T02:33:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2103.00138","created_at":"2026-07-05T02:33:29Z"},{"alias_kind":"pith_short_12","alias_value":"ZXXDR5GHAFLA","created_at":"2026-07-05T02:33:29Z"},{"alias_kind":"pith_short_16","alias_value":"ZXXDR5GHAFLAKPCZ","created_at":"2026-07-05T02:33:29Z"},{"alias_kind":"pith_short_8","alias_value":"ZXXDR5GH","created_at":"2026-07-05T02:33:29Z"}],"graph_snapshots":[{"event_id":"sha256:5e25cbabce7c0f48dbd79bc4fb44c37ce92f9a5ab78b6b4880e1f583f5924b76","target":"graph","created_at":"2026-07-05T02:33:29Z","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/2103.00138/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Recently, GRAVITY onboard the Very Large Telescope Interferometer (VLTI) first spatially resolved the structure of the quasar 3C 273 with an unprecedented resolution of $\\sim 10\\mu$as. A new method of measuring parallax distances has been successfully applied to the quasar through joint analysis of spectroastrometry (SA) and reverberation mapping (RM) observation of its broad line region (BLR). The uncertainty of this SA and RM (SARM) measurement is about $16\\%$ from real data, showing its great potential as a powerful tool for precision cosmology. In this paper, we carry out detailed analyses","authors_text":"Jian-Min Wang, Pu Du, Yan-Rong Li, Yu-Yang Songsheng","cross_cats":["astro-ph.CO"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-02-27T06:23:24Z","title":"Geometric Distances of Quasars Measured by Spectroastrometry and Reverberation Mapping:Monte Carlo Simulations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2103.00138","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:a67da3f287a749099c8fc710a3d8d343a3d37630e100a04ded74001bcb8e8201","target":"record","created_at":"2026-07-05T02:33:29Z","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":"161800d2a423d66bddf536501cd9056fd8d5335d867c6bbf284bc3898164975d","cross_cats_sorted":["astro-ph.CO"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-02-27T06:23:24Z","title_canon_sha256":"d4fa5bdf76c6e73604134a883ffcdacbe438b8e63d597d18c61c03b822a7806d"},"schema_version":"1.0","source":{"id":"2103.00138","kind":"arxiv","version":1}},"canonical_sha256":"cdee38f4c70156053c598445484be8f31a8a657b0598914a798938908d2428fe","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cdee38f4c70156053c598445484be8f31a8a657b0598914a798938908d2428fe","first_computed_at":"2026-07-05T02:33:29.892216Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:33:29.892216Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1onEmh1sp3JClsxSsoRKn1PIUyCV9M21e+SVkjULsgOEFnMlY9BTTfxr/zLmeFkhtCII0uRBzH6EMKhJ3qAECQ==","signature_status":"signed_v1","signed_at":"2026-07-05T02:33:29.892688Z","signed_message":"canonical_sha256_bytes"},"source_id":"2103.00138","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a67da3f287a749099c8fc710a3d8d343a3d37630e100a04ded74001bcb8e8201","sha256:5e25cbabce7c0f48dbd79bc4fb44c37ce92f9a5ab78b6b4880e1f583f5924b76"],"state_sha256":"2953d839135eff7113188b2cb8e105cc6797c9973ece276be3cd304502e61e24"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ncqPlKz/ilQfAxOOERccU1XLq6cZUaRdbgQ0a0wNSdwclPxqV91ErMeHc3yabzz7vexVDwcAf+VZ5lgP13voDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-17T16:41:46.264707Z","bundle_sha256":"b17c42a645ae1f3fd1f55d734ce9d74f4da99ed7d87c0e5673ed002ee0c93ae9"}}