{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:BO6CPTJY5LEV4AHJM7M4BYQGBF","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":"c226800a7014c82a34ee58ecc7d880a9a5612fb47c94794b11b2d9b03f1ea60c","cross_cats_sorted":["astro-ph.CO"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2026-06-11T13:43:25Z","title_canon_sha256":"6d85d60cda6bc24d1e0f1d4147cb008dcc2459feb326bacee30e530d46a95d9b"},"schema_version":"1.0","source":{"id":"2606.13356","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.13356","created_at":"2026-06-12T01:09:57Z"},{"alias_kind":"arxiv_version","alias_value":"2606.13356v1","created_at":"2026-06-12T01:09:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.13356","created_at":"2026-06-12T01:09:57Z"},{"alias_kind":"pith_short_12","alias_value":"BO6CPTJY5LEV","created_at":"2026-06-12T01:09:57Z"},{"alias_kind":"pith_short_16","alias_value":"BO6CPTJY5LEV4AHJ","created_at":"2026-06-12T01:09:57Z"},{"alias_kind":"pith_short_8","alias_value":"BO6CPTJY","created_at":"2026-06-12T01:09:57Z"}],"graph_snapshots":[{"event_id":"sha256:ddaefe9d5acc918d7e5da386b520c3887230109cbcd558912670c9b4a71049b1","target":"graph","created_at":"2026-06-12T01:09:57Z","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/2606.13356/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We constrain the cosmological constant $\\Lambda$ using astrometric and spectroscopic observations of the S2, S1, and S14 stars orbiting Sgr A$^*$. The stellar motion is modelled by numerically integrating timelike geodesics in Schwarzschild-de Sitter spacetime, including relativistic redshift and time-delay corrections. Orbital and spacetime parameters are inferred using a Bayesian MCMC analysis. The resulting posterior distributions place upper bounds on the magnitude of $\\Lambda$ at the Galactic Center (GC). Combining the independent constraints from the S2, S1, and S14 orbits yields upper b","authors_text":"David F. Mota, Muzammil Mushtaq, Prajwal Hassan Puttasiddappa, Willian Ramirez","cross_cats":["astro-ph.CO"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2026-06-11T13:43:25Z","title":"Bounds on $\\Lambda$ at the Galactic Center"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.13356","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:b3c261a6ab49432b20b85ee8ff1aaab817d5a77a763812c23f4970d34d90ae9f","target":"record","created_at":"2026-06-12T01:09:57Z","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":"c226800a7014c82a34ee58ecc7d880a9a5612fb47c94794b11b2d9b03f1ea60c","cross_cats_sorted":["astro-ph.CO"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2026-06-11T13:43:25Z","title_canon_sha256":"6d85d60cda6bc24d1e0f1d4147cb008dcc2459feb326bacee30e530d46a95d9b"},"schema_version":"1.0","source":{"id":"2606.13356","kind":"arxiv","version":1}},"canonical_sha256":"0bbc27cd38eac95e00e967d9c0e206095d5d7c5a13412f93262d11b441582169","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0bbc27cd38eac95e00e967d9c0e206095d5d7c5a13412f93262d11b441582169","first_computed_at":"2026-06-12T01:09:57.099661Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-12T01:09:57.099661Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5YxikDjZbRspe6CVTLkb0jxr1H7qHftXMoFPAwcZl7HN8PJB46zuMGfIREtco0Cx5CTIBSujcu6XkLg5MbVbBw==","signature_status":"signed_v1","signed_at":"2026-06-12T01:09:57.100172Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.13356","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b3c261a6ab49432b20b85ee8ff1aaab817d5a77a763812c23f4970d34d90ae9f","sha256:ddaefe9d5acc918d7e5da386b520c3887230109cbcd558912670c9b4a71049b1"],"state_sha256":"b6f1a056bf0e8044e7f373883f88ad0d7414b9be9fd96114425f7c6dbb598a74"}