{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:YJ6LCBYQYANSMZMHTLMLLMJRZN","short_pith_number":"pith:YJ6LCBYQ","canonical_record":{"source":{"id":"2101.01454","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-01-05T11:08:47Z","cross_cats_sorted":[],"title_canon_sha256":"07fd0708e0d1dd75307a40eda3fe693c2022f4ec88d139a994c8dba273a1af03","abstract_canon_sha256":"8b6baa6bb53362ac7fa5361a362a98ed4514a3e663152bf54a9c49a29ae0a1ad"},"schema_version":"1.0"},"canonical_sha256":"c27cb10710c01b2665879ad8b5b131cb6fb7cfaf0ca67e891388e5ed82ec3b45","source":{"kind":"arxiv","id":"2101.01454","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2101.01454","created_at":"2026-07-05T02:17:47Z"},{"alias_kind":"arxiv_version","alias_value":"2101.01454v2","created_at":"2026-07-05T02:17:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2101.01454","created_at":"2026-07-05T02:17:47Z"},{"alias_kind":"pith_short_12","alias_value":"YJ6LCBYQYANS","created_at":"2026-07-05T02:17:47Z"},{"alias_kind":"pith_short_16","alias_value":"YJ6LCBYQYANSMZMH","created_at":"2026-07-05T02:17:47Z"},{"alias_kind":"pith_short_8","alias_value":"YJ6LCBYQ","created_at":"2026-07-05T02:17:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:YJ6LCBYQYANSMZMHTLMLLMJRZN","target":"record","payload":{"canonical_record":{"source":{"id":"2101.01454","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-01-05T11:08:47Z","cross_cats_sorted":[],"title_canon_sha256":"07fd0708e0d1dd75307a40eda3fe693c2022f4ec88d139a994c8dba273a1af03","abstract_canon_sha256":"8b6baa6bb53362ac7fa5361a362a98ed4514a3e663152bf54a9c49a29ae0a1ad"},"schema_version":"1.0"},"canonical_sha256":"c27cb10710c01b2665879ad8b5b131cb6fb7cfaf0ca67e891388e5ed82ec3b45","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:17:47.841054Z","signature_b64":"VyEbfyH8sA9PdrNwIx9NbuxOLabghf2CiH51mtIhH55150kRPy8E0cpZBbRfgNtJKqQrYBt3BbiApm/NE02LAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c27cb10710c01b2665879ad8b5b131cb6fb7cfaf0ca67e891388e5ed82ec3b45","last_reissued_at":"2026-07-05T02:17:47.840534Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:17:47.840534Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2101.01454","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":"2026-07-05T02:17:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uGm0a2swnFvfYBNvBZQ8E56/zVrfwKWnt3IMterJWP3iAC0aq+39hogdfbCOfjYxIK8VePbHPB1uKuMnaZ99Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T17:22:21.310350Z"},"content_sha256":"0fb04c422003a758a09ac0ed0564d34f6c1c457c64c068fa4c344a64cbea22fe","schema_version":"1.0","event_id":"sha256:0fb04c422003a758a09ac0ed0564d34f6c1c457c64c068fa4c344a64cbea22fe"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:YJ6LCBYQYANSMZMHTLMLLMJRZN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Trigonometric Parallaxes of Four Star-forming Regions in the Distant Inner Galaxy","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. Brunthaler, B. Zhang, G. Wu, J. J. Li, K. M. Menten, L. Moscadelli, M. J. Reid, S. B. Bian, T. M. Dame, X. W. Zheng, Y. W. Wu, Y. Xu","submitted_at":"2021-01-05T11:08:47Z","abstract_excerpt":"We have measured trigonometric parallaxes for four water masers associated with distant massive young stars in the inner regions of the Galaxy using the VLBA as part of the BeSSeL Survey. G026.50$+$0.28. is located at the near end of the Galactic bar, perhaps at the origin of the Norma spiral arm. G020.77$-$0.05 is in the Galactic Center region and is likely associated with a far-side extension of the Scutum arm. G019.60$-$0.23 and G020.08$-$0.13 are likely associated and lie well past the Galactic Center. These sources appear to be in the Sagittarius spiral arm, but an association with the Pe"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2101.01454","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/2101.01454/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":"2026-07-05T02:17:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yAeMUv3oH0K0GEPm+7D/BWsy3BrqEt5/YOD4b+3qDvo5qGv/ypiylnm47ERNxEY+CznaLWqZdcamprUIUnNBDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T17:22:21.310739Z"},"content_sha256":"82ab1e9073f567920eb3b02d9f978f23fa364c021bba96c2944ecaebe183c946","schema_version":"1.0","event_id":"sha256:82ab1e9073f567920eb3b02d9f978f23fa364c021bba96c2944ecaebe183c946"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YJ6LCBYQYANSMZMHTLMLLMJRZN/bundle.json","state_url":"https://pith.science/pith/YJ6LCBYQYANSMZMHTLMLLMJRZN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YJ6LCBYQYANSMZMHTLMLLMJRZN/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":"2026-07-06T17:22:21Z","links":{"resolver":"https://pith.science/pith/YJ6LCBYQYANSMZMHTLMLLMJRZN","bundle":"https://pith.science/pith/YJ6LCBYQYANSMZMHTLMLLMJRZN/bundle.json","state":"https://pith.science/pith/YJ6LCBYQYANSMZMHTLMLLMJRZN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YJ6LCBYQYANSMZMHTLMLLMJRZN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:YJ6LCBYQYANSMZMHTLMLLMJRZN","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":"8b6baa6bb53362ac7fa5361a362a98ed4514a3e663152bf54a9c49a29ae0a1ad","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-01-05T11:08:47Z","title_canon_sha256":"07fd0708e0d1dd75307a40eda3fe693c2022f4ec88d139a994c8dba273a1af03"},"schema_version":"1.0","source":{"id":"2101.01454","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2101.01454","created_at":"2026-07-05T02:17:47Z"},{"alias_kind":"arxiv_version","alias_value":"2101.01454v2","created_at":"2026-07-05T02:17:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2101.01454","created_at":"2026-07-05T02:17:47Z"},{"alias_kind":"pith_short_12","alias_value":"YJ6LCBYQYANS","created_at":"2026-07-05T02:17:47Z"},{"alias_kind":"pith_short_16","alias_value":"YJ6LCBYQYANSMZMH","created_at":"2026-07-05T02:17:47Z"},{"alias_kind":"pith_short_8","alias_value":"YJ6LCBYQ","created_at":"2026-07-05T02:17:47Z"}],"graph_snapshots":[{"event_id":"sha256:82ab1e9073f567920eb3b02d9f978f23fa364c021bba96c2944ecaebe183c946","target":"graph","created_at":"2026-07-05T02:17:47Z","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/2101.01454/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We have measured trigonometric parallaxes for four water masers associated with distant massive young stars in the inner regions of the Galaxy using the VLBA as part of the BeSSeL Survey. G026.50$+$0.28. is located at the near end of the Galactic bar, perhaps at the origin of the Norma spiral arm. G020.77$-$0.05 is in the Galactic Center region and is likely associated with a far-side extension of the Scutum arm. G019.60$-$0.23 and G020.08$-$0.13 are likely associated and lie well past the Galactic Center. These sources appear to be in the Sagittarius spiral arm, but an association with the Pe","authors_text":"A. Brunthaler, B. Zhang, G. Wu, J. J. Li, K. M. Menten, L. Moscadelli, M. J. Reid, S. B. Bian, T. M. Dame, X. W. Zheng, Y. W. Wu, Y. Xu","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-01-05T11:08:47Z","title":"Trigonometric Parallaxes of Four Star-forming Regions in the Distant Inner Galaxy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2101.01454","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":"sha256:0fb04c422003a758a09ac0ed0564d34f6c1c457c64c068fa4c344a64cbea22fe","target":"record","created_at":"2026-07-05T02:17:47Z","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":"8b6baa6bb53362ac7fa5361a362a98ed4514a3e663152bf54a9c49a29ae0a1ad","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-01-05T11:08:47Z","title_canon_sha256":"07fd0708e0d1dd75307a40eda3fe693c2022f4ec88d139a994c8dba273a1af03"},"schema_version":"1.0","source":{"id":"2101.01454","kind":"arxiv","version":2}},"canonical_sha256":"c27cb10710c01b2665879ad8b5b131cb6fb7cfaf0ca67e891388e5ed82ec3b45","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c27cb10710c01b2665879ad8b5b131cb6fb7cfaf0ca67e891388e5ed82ec3b45","first_computed_at":"2026-07-05T02:17:47.840534Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:17:47.840534Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VyEbfyH8sA9PdrNwIx9NbuxOLabghf2CiH51mtIhH55150kRPy8E0cpZBbRfgNtJKqQrYBt3BbiApm/NE02LAw==","signature_status":"signed_v1","signed_at":"2026-07-05T02:17:47.841054Z","signed_message":"canonical_sha256_bytes"},"source_id":"2101.01454","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0fb04c422003a758a09ac0ed0564d34f6c1c457c64c068fa4c344a64cbea22fe","sha256:82ab1e9073f567920eb3b02d9f978f23fa364c021bba96c2944ecaebe183c946"],"state_sha256":"e13bcf18ff40c97de89091d64af0bf6a3813426c450dfa1db1f9b4d99420163a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FnvkhRxLSn7K7vFJ/ILpAqnlDaRYH/Sp5Ab7tv89VKQlId+mpN4VAEKqqPHE0lp6qOfpq6IPlBhW2WGeHZOQBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-06T17:22:21.312770Z","bundle_sha256":"14db5d291fb131fc3ccfbb652ef6d1041b2ea2a5a67944b81d12bda13ee13baa"}}