{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:FFRMNKC4U2XM2W7B6MNIXE4ECF","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":"46d2068688eb23a9ba3e93fbbde55ed79a0b7c8f29ce194c3fcd442347c3f813","cross_cats_sorted":["astro-ph.IM","astro-ph.SR","stat.ME"],"license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"astro-ph.EP","submitted_at":"2022-01-31T16:40:00Z","title_canon_sha256":"6bad4b73505951f26256ed2ad191d89937232b9401f2575196743557432341a1"},"schema_version":"1.0","source":{"id":"2201.13342","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2201.13342","created_at":"2026-07-05T04:09:46Z"},{"alias_kind":"arxiv_version","alias_value":"2201.13342v1","created_at":"2026-07-05T04:09:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2201.13342","created_at":"2026-07-05T04:09:46Z"},{"alias_kind":"pith_short_12","alias_value":"FFRMNKC4U2XM","created_at":"2026-07-05T04:09:46Z"},{"alias_kind":"pith_short_16","alias_value":"FFRMNKC4U2XM2W7B","created_at":"2026-07-05T04:09:46Z"},{"alias_kind":"pith_short_8","alias_value":"FFRMNKC4","created_at":"2026-07-05T04:09:46Z"}],"graph_snapshots":[{"event_id":"sha256:29fcdc96e5aec347d4133bd98e19302f3f4dc7361ff8e563e6e21fbb53cf684b","target":"graph","created_at":"2026-07-05T04:09:46Z","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/2201.13342/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"If Doppler searches for earth-mass, habitable planets are to succeed, observers must be able to identify and model out stellar activity signals. Here we demonstrate how to diagnose activity signals by calculating the magnitude-squared coherence $\\hat{C}^2_{xy}(f)$ between an activity indicator time series $x_t$ and the radial velocity (RV) time series $y_t$. Since planets only cause modulation in RV, not in activity indicators, a high value of $\\hat{C}^2_{xy}(f)$ indicates that the signal at frequency $f$ has a stellar origin. We use Welch's method to measure coherence between activity indicat","authors_text":"Charlotte Haley, Justin Harrell, Sarah E. Dodson-Robinson, Victor Ramirez Delgado","cross_cats":["astro-ph.IM","astro-ph.SR","stat.ME"],"headline":"","license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"astro-ph.EP","submitted_at":"2022-01-31T16:40:00Z","title":"Magnitude-squared coherence: A powerful tool for disentangling Doppler planet discoveries from stellar activity"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2201.13342","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:af13ad75fc480883407275e61020b8ee5c1ad43b601ce7e3ebdf6edbb1e45af2","target":"record","created_at":"2026-07-05T04:09:46Z","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":"46d2068688eb23a9ba3e93fbbde55ed79a0b7c8f29ce194c3fcd442347c3f813","cross_cats_sorted":["astro-ph.IM","astro-ph.SR","stat.ME"],"license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"astro-ph.EP","submitted_at":"2022-01-31T16:40:00Z","title_canon_sha256":"6bad4b73505951f26256ed2ad191d89937232b9401f2575196743557432341a1"},"schema_version":"1.0","source":{"id":"2201.13342","kind":"arxiv","version":1}},"canonical_sha256":"2962c6a85ca6aecd5be1f31a8b9384115c820b2bd987b7a451f5fc0ce2dbec39","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2962c6a85ca6aecd5be1f31a8b9384115c820b2bd987b7a451f5fc0ce2dbec39","first_computed_at":"2026-07-05T04:09:46.323151Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:09:46.323151Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"t/U/OGRq+OorAUwxkdPm5JZkryCB4ViaXVDaIllciToO72iI9W9xCwCyAwO4io2ffjNBkUn1BiRVrXNWMyt+DQ==","signature_status":"signed_v1","signed_at":"2026-07-05T04:09:46.323619Z","signed_message":"canonical_sha256_bytes"},"source_id":"2201.13342","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:af13ad75fc480883407275e61020b8ee5c1ad43b601ce7e3ebdf6edbb1e45af2","sha256:29fcdc96e5aec347d4133bd98e19302f3f4dc7361ff8e563e6e21fbb53cf684b"],"state_sha256":"cb1935c97a068ca4b3b30fa5889912aad4b13fe480040a86d3bd9100f822d2cb"}