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A lot of effort has been put into the detection and determination of stellar magnetic fields using the spectral signal obtained from the combination of hundreds or thousands of individual lines, an approach known as multi-line techniques. However, so far most of multi-line techniques developed that retrieve stellar mean longitudinal magnetic fields recourse to sometimes heavy simplifications concerning line shapes and Zeeman splittings.\n  Aims. To determine stellar longitudinal magnetic fields by means of the Principal Components Analysis and Zeeman Doppler Imaging (PCA-ZDI) multi-lin"},"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":"1609.06278","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-09-20T18:10:05Z","cross_cats_sorted":[],"title_canon_sha256":"1e572d0aa58eebc3b44b390994d2ac34017964bca469bcd56b523581b2afe1b9","abstract_canon_sha256":"3e80fec2c83fbc9cf4c44f287536a5216658881490e5558b3846ed1028991b6a"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:55:41.394897Z","signature_b64":"gV5WRWwLjP7x7ms+hOWF+9viISE0iVNdjB0IYwHDDOG68vPYHHdfZLrOrCbrxwkoHsN1cLI9JazfVvM/esVIDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f7b5036eaef4dd00136d94c5577c545a285ca3aa5b72245cc5f98cb45328f025","last_reissued_at":"2026-05-18T00:55:41.394229Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:55:41.394229Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Stellar longitudinal magnetic field determination through multi-Zeeman signatures","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. 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