{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2021:PQRCG42YXWP4DA23A3RXQGZHTR","short_pith_number":"pith:PQRCG42Y","schema_version":"1.0","canonical_sha256":"7c22237358bd9fc1835b06e3781b279c6be07d5460fae2c1ebe47fff935f20d7","source":{"kind":"arxiv","id":"2107.06376","version":1},"attestation_state":"computed","paper":{"title":"CARMENES input catalog of M dwarfs VI. A time-resolved Ca II H&K catalog from archival data","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. Quirrenbach, A. Reiners, A. Schweitzer, C. Cifuentes, D. Montes, D. Revilla, I. Ribas, J. A. Caballero, J. H. M. M. Schmitt, L. Tal-Or, M. Cort\\'es-Contreras, M. Mittag, P. J. Amado, S. L. Skrzypinski, S. V. Jeffers, T. Trifonov, V. Perdelwitz, W. Seifert","submitted_at":"2021-07-13T20:27:47Z","abstract_excerpt":"Radial-velocity (RV) jitter caused by stellar magnetic activity is an important factor in state-of-the-art exoplanet discovery surveys such as CARMENES. Stellar rotation, along with heterogeneities in the photosphere and chromosphere caused by activity, can result in false-positive planet detections. Hence, it is necessary to determine the stellar rotation period and compare it to any putative planetary RV signature. Long-term measurements of activity indicators such as the chromospheric emission in the Ca II H&K lines enable the identification of magnetic activity cycles. In order to determin"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2107.06376","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-07-13T20:27:47Z","cross_cats_sorted":[],"title_canon_sha256":"0557691a3526becdd3069583344dd13a0bdc403c8590da7360f55679aae16450","abstract_canon_sha256":"228fb6de4ae63966e980ff214a44c7e2521cb991b40c028961c3730941dd9ff0"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:08:35.682402Z","signature_b64":"DtwzFD8PvqehEvZjOYZdDu+7tZExF6Tghl5yVws3+mhSIcSLC5f+tgLEnyF22Huzz0ZpYfwMOZmMZPc3zAazCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7c22237358bd9fc1835b06e3781b279c6be07d5460fae2c1ebe47fff935f20d7","last_reissued_at":"2026-07-05T03:08:35.681944Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:08:35.681944Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"CARMENES input catalog of M dwarfs VI. A time-resolved Ca II H&K catalog from archival data","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. Quirrenbach, A. Reiners, A. Schweitzer, C. Cifuentes, D. Montes, D. Revilla, I. Ribas, J. A. Caballero, J. H. M. M. Schmitt, L. Tal-Or, M. Cort\\'es-Contreras, M. Mittag, P. J. Amado, S. L. Skrzypinski, S. V. Jeffers, T. Trifonov, V. Perdelwitz, W. Seifert","submitted_at":"2021-07-13T20:27:47Z","abstract_excerpt":"Radial-velocity (RV) jitter caused by stellar magnetic activity is an important factor in state-of-the-art exoplanet discovery surveys such as CARMENES. Stellar rotation, along with heterogeneities in the photosphere and chromosphere caused by activity, can result in false-positive planet detections. Hence, it is necessary to determine the stellar rotation period and compare it to any putative planetary RV signature. Long-term measurements of activity indicators such as the chromospheric emission in the Ca II H&K lines enable the identification of magnetic activity cycles. In order to determin"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.06376","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/2107.06376/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2107.06376","created_at":"2026-07-05T03:08:35.682001+00:00"},{"alias_kind":"arxiv_version","alias_value":"2107.06376v1","created_at":"2026-07-05T03:08:35.682001+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.06376","created_at":"2026-07-05T03:08:35.682001+00:00"},{"alias_kind":"pith_short_12","alias_value":"PQRCG42YXWP4","created_at":"2026-07-05T03:08:35.682001+00:00"},{"alias_kind":"pith_short_16","alias_value":"PQRCG42YXWP4DA23","created_at":"2026-07-05T03:08:35.682001+00:00"},{"alias_kind":"pith_short_8","alias_value":"PQRCG42Y","created_at":"2026-07-05T03:08:35.682001+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/PQRCG42YXWP4DA23A3RXQGZHTR","json":"https://pith.science/pith/PQRCG42YXWP4DA23A3RXQGZHTR.json","graph_json":"https://pith.science/api/pith-number/PQRCG42YXWP4DA23A3RXQGZHTR/graph.json","events_json":"https://pith.science/api/pith-number/PQRCG42YXWP4DA23A3RXQGZHTR/events.json","paper":"https://pith.science/paper/PQRCG42Y"},"agent_actions":{"view_html":"https://pith.science/pith/PQRCG42YXWP4DA23A3RXQGZHTR","download_json":"https://pith.science/pith/PQRCG42YXWP4DA23A3RXQGZHTR.json","view_paper":"https://pith.science/paper/PQRCG42Y","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2107.06376&json=true","fetch_graph":"https://pith.science/api/pith-number/PQRCG42YXWP4DA23A3RXQGZHTR/graph.json","fetch_events":"https://pith.science/api/pith-number/PQRCG42YXWP4DA23A3RXQGZHTR/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/PQRCG42YXWP4DA23A3RXQGZHTR/action/timestamp_anchor","attest_storage":"https://pith.science/pith/PQRCG42YXWP4DA23A3RXQGZHTR/action/storage_attestation","attest_author":"https://pith.science/pith/PQRCG42YXWP4DA23A3RXQGZHTR/action/author_attestation","sign_citation":"https://pith.science/pith/PQRCG42YXWP4DA23A3RXQGZHTR/action/citation_signature","submit_replication":"https://pith.science/pith/PQRCG42YXWP4DA23A3RXQGZHTR/action/replication_record"}},"created_at":"2026-07-05T03:08:35.682001+00:00","updated_at":"2026-07-05T03:08:35.682001+00:00"}