{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:FQ3SJ6EDHSJYPW7RHDGT7EJP4M","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":"098d7568d4f95fe348a9a30aeb4d50c13374deb7db13ceac9d957eff606b4d9a","cross_cats_sorted":["astro-ph.EP","stat.AP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-07-30T21:42:23Z","title_canon_sha256":"c0adf7b36a33791362a11141377c8c8d03897a42b0f380849145daa0ba2e2e7b"},"schema_version":"1.0","source":{"id":"1807.11591","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.11591","created_at":"2026-05-17T23:55:20Z"},{"alias_kind":"arxiv_version","alias_value":"1807.11591v2","created_at":"2026-05-17T23:55:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.11591","created_at":"2026-05-17T23:55:20Z"},{"alias_kind":"pith_short_12","alias_value":"FQ3SJ6EDHSJY","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_16","alias_value":"FQ3SJ6EDHSJYPW7R","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_8","alias_value":"FQ3SJ6ED","created_at":"2026-05-18T12:32:25Z"}],"graph_snapshots":[{"event_id":"sha256:e4372505d5c5f2df290de9e68b1365a1ff02f037db626e27c072a91aafd29312","target":"graph","created_at":"2026-05-17T23:55:20Z","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":"Transit timing variations (TTVs) are a valuable tool to determine the masses and orbits of transiting planets in multi-planet systems. TTVs can be readily modeled given knowledge of the interacting planets' orbital configurations and planet-star mass ratios, but such models are highly nonlinear and difficult to invert. Markov chain Monte Carlo (MCMC) methods are often used to explore the posterior distribution for model parameters, but, due to the high correlations between parameters, nonlinearity, and potential multi-modality in the posterior, many samplers perform very inefficiently. Therefo","authors_text":"Alexey Lindo, Eric B. Ford, Noah W. Tuchow, Theodore Papamarkou","cross_cats":["astro-ph.EP","stat.AP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-07-30T21:42:23Z","title":"The Efficiency of Geometric Samplers for Exoplanet Transit Timing Variation Models"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.11591","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":"sha256:7b958200787cfc1cc55deb140cc7939faaec75c42abea6fa313a4eaa4de36107","target":"record","created_at":"2026-05-17T23:55:20Z","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":"098d7568d4f95fe348a9a30aeb4d50c13374deb7db13ceac9d957eff606b4d9a","cross_cats_sorted":["astro-ph.EP","stat.AP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-07-30T21:42:23Z","title_canon_sha256":"c0adf7b36a33791362a11141377c8c8d03897a42b0f380849145daa0ba2e2e7b"},"schema_version":"1.0","source":{"id":"1807.11591","kind":"arxiv","version":2}},"canonical_sha256":"2c3724f8833c9387dbf138cd3f912fe30b622ed1edab80efa2f70dd852fccb68","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2c3724f8833c9387dbf138cd3f912fe30b622ed1edab80efa2f70dd852fccb68","first_computed_at":"2026-05-17T23:55:20.228413Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:55:20.228413Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"lrkn6gSDCiUrYXKuPj6UrLj/xRq3DXULNFwfx/4sMn6dOqRHaPxnWhcFPKkRjTPnyhsfDiEwJlvea0WXQBqNCA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:55:20.228822Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.11591","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7b958200787cfc1cc55deb140cc7939faaec75c42abea6fa313a4eaa4de36107","sha256:e4372505d5c5f2df290de9e68b1365a1ff02f037db626e27c072a91aafd29312"],"state_sha256":"cc2256d4eeafc7d2c341dd3651d69368bac69f441aded9eb3b8a2a7df94f3374"}