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Since this active star is near the fully-convective boundary, to study in detail its long-term chromospheric activity could be an appreciable contribution for the dynamo theory. Here, we analyze with the Lomb-Scargle periodogram the Ca II K line-core fluxes derived from CASLEO spectra obtained between 2001 and 2013 and the V magnitude from the ASAS database between 2004 and 2010. From both totally independent time-series, we obtain a possible activity cycle of period $\\sim7$ years and a l"},"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":"1312.3810","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-12-13T13:53:16Z","cross_cats_sorted":[],"title_canon_sha256":"8cd4fd1528c62280bd848885b0ab637e683bc9d781a9199aef0966fb8e89acf6","abstract_canon_sha256":"a9785dd5344e7715884862aecedc94d5dee9b5b7d80bee2f95a98a4b8d37c62a"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:45:50.792899Z","signature_b64":"e4M2KHlw8cmk9edehtTxUa7mK+W4VooB3Ru0iFzEBZZMdVWcH5tbh7vjO193KRQukvEAoMFJ/NNSPoHsxYA7DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8dcf38f2cd5d920a3421f7e487c1afb02c1e037262991d44d3f147ead95d95d6","last_reissued_at":"2026-05-18T01:45:50.792494Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:45:50.792494Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Possible chromospheric activity cycles in AD Leo","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Andrea P. 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