{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:FJT5YOG4F54I4KDXGMUYU65MOO","short_pith_number":"pith:FJT5YOG4","canonical_record":{"source":{"id":"1909.06566","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-09-14T09:30:37Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"c9588ff036fb179019f324b7a09853562d5d85ee6ecd180a83a2b99b825154f6","abstract_canon_sha256":"00c49440b2d23037269779789418ec4ff1f9c3095866d599cfd8fcff6ba876c0"},"schema_version":"1.0"},"canonical_sha256":"2a67dc38dc2f788e287733298a7bac73acf116a9e41d4c40ddc2d52a5668e0f6","source":{"kind":"arxiv","id":"1909.06566","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1909.06566","created_at":"2026-07-05T00:04:47Z"},{"alias_kind":"arxiv_version","alias_value":"1909.06566v1","created_at":"2026-07-05T00:04:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1909.06566","created_at":"2026-07-05T00:04:47Z"},{"alias_kind":"pith_short_12","alias_value":"FJT5YOG4F54I","created_at":"2026-07-05T00:04:47Z"},{"alias_kind":"pith_short_16","alias_value":"FJT5YOG4F54I4KDX","created_at":"2026-07-05T00:04:47Z"},{"alias_kind":"pith_short_8","alias_value":"FJT5YOG4","created_at":"2026-07-05T00:04:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:FJT5YOG4F54I4KDXGMUYU65MOO","target":"record","payload":{"canonical_record":{"source":{"id":"1909.06566","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-09-14T09:30:37Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"c9588ff036fb179019f324b7a09853562d5d85ee6ecd180a83a2b99b825154f6","abstract_canon_sha256":"00c49440b2d23037269779789418ec4ff1f9c3095866d599cfd8fcff6ba876c0"},"schema_version":"1.0"},"canonical_sha256":"2a67dc38dc2f788e287733298a7bac73acf116a9e41d4c40ddc2d52a5668e0f6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:04:47.499955Z","signature_b64":"1B5B04jV9sJQLWFJr8wImbBJ2QRAdMlgC9bOmP51zFqMfVRTWdP+5wQ3GI3n71XUp47yyLTUyc7nl/OQIu4gDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2a67dc38dc2f788e287733298a7bac73acf116a9e41d4c40ddc2d52a5668e0f6","last_reissued_at":"2026-07-05T00:04:47.499554Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:04:47.499554Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1909.06566","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":"2026-07-05T00:04:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pK78KDwSh3cqLSNvQW+VG74oyXU800JOFgBRzTqgjp970O+gHTG64efsTICPXVwJ6Nhb8/gSHJ6uzgVcieD0Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T12:06:00.934873Z"},"content_sha256":"3585170ea200f5e2599d05f5fef74de9be4803ebc334aa077002b6aff1640cf5","schema_version":"1.0","event_id":"sha256:3585170ea200f5e2599d05f5fef74de9be4803ebc334aa077002b6aff1640cf5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:FJT5YOG4F54I4KDXGMUYU65MOO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Activity time series of old stars from late F to early K IV. Diagnosis from photometry","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.EP"],"primary_cat":"astro-ph.SR","authors_text":"Anne-Marie Lagrange, Nadege Meunier","submitted_at":"2019-09-14T09:30:37Z","abstract_excerpt":"High-precision time series have recently become available for many stars as a result of data from CoRoT, Kepler, and TESS and have been widely used to study stellar activity. They provide information integrated over the stellar disk, hence many degeneracies between spots and plages or sizes and contrasts. Our aim is to understand how to relate photometric variability to physical parameters in order to help the interpretation of these observations. We computed a large number of synthetic time series of brightness variations for old MS stars within the F6-K4 range, using consistent modeling for "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1909.06566","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/1909.06566/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":"2026-07-05T00:04:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FNTA7fLuvx/hRNuNWo/F9oaxQKPln/Z4Ry51HhnFepjw2ndNU8dwWiYlB6mmtXSpXuCRh3cYcpjc9uN816ZkBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T12:06:00.935493Z"},"content_sha256":"45226980fd4fe568d94c873e249008d71320bcf9c0009aa3b70a334f8de7ad3f","schema_version":"1.0","event_id":"sha256:45226980fd4fe568d94c873e249008d71320bcf9c0009aa3b70a334f8de7ad3f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FJT5YOG4F54I4KDXGMUYU65MOO/bundle.json","state_url":"https://pith.science/pith/FJT5YOG4F54I4KDXGMUYU65MOO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FJT5YOG4F54I4KDXGMUYU65MOO/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":"2026-08-01T12:06:00Z","links":{"resolver":"https://pith.science/pith/FJT5YOG4F54I4KDXGMUYU65MOO","bundle":"https://pith.science/pith/FJT5YOG4F54I4KDXGMUYU65MOO/bundle.json","state":"https://pith.science/pith/FJT5YOG4F54I4KDXGMUYU65MOO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FJT5YOG4F54I4KDXGMUYU65MOO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:FJT5YOG4F54I4KDXGMUYU65MOO","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":"00c49440b2d23037269779789418ec4ff1f9c3095866d599cfd8fcff6ba876c0","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-09-14T09:30:37Z","title_canon_sha256":"c9588ff036fb179019f324b7a09853562d5d85ee6ecd180a83a2b99b825154f6"},"schema_version":"1.0","source":{"id":"1909.06566","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1909.06566","created_at":"2026-07-05T00:04:47Z"},{"alias_kind":"arxiv_version","alias_value":"1909.06566v1","created_at":"2026-07-05T00:04:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1909.06566","created_at":"2026-07-05T00:04:47Z"},{"alias_kind":"pith_short_12","alias_value":"FJT5YOG4F54I","created_at":"2026-07-05T00:04:47Z"},{"alias_kind":"pith_short_16","alias_value":"FJT5YOG4F54I4KDX","created_at":"2026-07-05T00:04:47Z"},{"alias_kind":"pith_short_8","alias_value":"FJT5YOG4","created_at":"2026-07-05T00:04:47Z"}],"graph_snapshots":[{"event_id":"sha256:45226980fd4fe568d94c873e249008d71320bcf9c0009aa3b70a334f8de7ad3f","target":"graph","created_at":"2026-07-05T00:04:47Z","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/1909.06566/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"High-precision time series have recently become available for many stars as a result of data from CoRoT, Kepler, and TESS and have been widely used to study stellar activity. They provide information integrated over the stellar disk, hence many degeneracies between spots and plages or sizes and contrasts. Our aim is to understand how to relate photometric variability to physical parameters in order to help the interpretation of these observations. We computed a large number of synthetic time series of brightness variations for old MS stars within the F6-K4 range, using consistent modeling for ","authors_text":"Anne-Marie Lagrange, Nadege Meunier","cross_cats":["astro-ph.EP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-09-14T09:30:37Z","title":"Activity time series of old stars from late F to early K IV. Diagnosis from photometry"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1909.06566","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":"sha256:3585170ea200f5e2599d05f5fef74de9be4803ebc334aa077002b6aff1640cf5","target":"record","created_at":"2026-07-05T00:04:47Z","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":"00c49440b2d23037269779789418ec4ff1f9c3095866d599cfd8fcff6ba876c0","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-09-14T09:30:37Z","title_canon_sha256":"c9588ff036fb179019f324b7a09853562d5d85ee6ecd180a83a2b99b825154f6"},"schema_version":"1.0","source":{"id":"1909.06566","kind":"arxiv","version":1}},"canonical_sha256":"2a67dc38dc2f788e287733298a7bac73acf116a9e41d4c40ddc2d52a5668e0f6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2a67dc38dc2f788e287733298a7bac73acf116a9e41d4c40ddc2d52a5668e0f6","first_computed_at":"2026-07-05T00:04:47.499554Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:04:47.499554Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1B5B04jV9sJQLWFJr8wImbBJ2QRAdMlgC9bOmP51zFqMfVRTWdP+5wQ3GI3n71XUp47yyLTUyc7nl/OQIu4gDw==","signature_status":"signed_v1","signed_at":"2026-07-05T00:04:47.499955Z","signed_message":"canonical_sha256_bytes"},"source_id":"1909.06566","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3585170ea200f5e2599d05f5fef74de9be4803ebc334aa077002b6aff1640cf5","sha256:45226980fd4fe568d94c873e249008d71320bcf9c0009aa3b70a334f8de7ad3f"],"state_sha256":"ee7d525f7c7fd1e2996d9f9508cbc27fd5fb7e1f54dd3b4baedeb6cc1d005ee6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lydHYJcfmprg64MbE2bfllRI/RqoctUVvFBftmVZsOLuFtiakLiSMKs28hFdyDy6gOzMtU2crq6OH+4wR1k1Dg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-01T12:06:00.939816Z","bundle_sha256":"fb87ad6537fb7b7e4c36b1157960b64c711e3d69a430ba67c487874b90d661e0"}}