{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:7Q443WSY3QAW7DSM77WECEVCLJ","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":"5400b6ac4c284a97aefd59a8fe4496dd0204ab9759708f00acfc7ed6b9b4a500","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-11-16T21:40:43Z","title_canon_sha256":"f5a604daa379710c90daee35c7b476fcdc296e2eb9a4d0441cad7f9a4e0a1157"},"schema_version":"1.0","source":{"id":"1611.05473","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1611.05473","created_at":"2026-05-18T00:53:57Z"},{"alias_kind":"arxiv_version","alias_value":"1611.05473v1","created_at":"2026-05-18T00:53:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1611.05473","created_at":"2026-05-18T00:53:57Z"},{"alias_kind":"pith_short_12","alias_value":"7Q443WSY3QAW","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_16","alias_value":"7Q443WSY3QAW7DSM","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_8","alias_value":"7Q443WSY","created_at":"2026-05-18T12:30:04Z"}],"graph_snapshots":[{"event_id":"sha256:d12e5f01ada19b6455014db9ead87f9fb949b5ad6935f48f5d33d1380e257838","target":"graph","created_at":"2026-05-18T00:53:57Z","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"},"paper":{"abstract_excerpt":"Doppler imaging (DI) is a powerful spectroscopic inversion technique that enables conversion of a line profile time series into a two-dimensional map of the stellar surface inhomogeneities. In this paper we investigate the accuracy of chemical abundance DI of Ap/Bp stars and assess the impact of several different systematic errors on the reconstructed spot maps. We simulate spectroscopic observational data for different spot distributions in the presence of a moderately strong dipolar magnetic field. We then reconstruct chemical maps using different sets of spectral lines and making different ","authors_text":"O. Kochukhov","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-11-16T21:40:43Z","title":"Doppler imaging of chemical spots on magnetic Ap/Bp stars. Numerical tests and assessment of systematic errors"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1611.05473","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":"sha256:10a8f9985b8f2abc964d742c81be8eef5df8fee46ea69ae1f9dd3d0af6d11a57","target":"record","created_at":"2026-05-18T00:53:57Z","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":"5400b6ac4c284a97aefd59a8fe4496dd0204ab9759708f00acfc7ed6b9b4a500","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-11-16T21:40:43Z","title_canon_sha256":"f5a604daa379710c90daee35c7b476fcdc296e2eb9a4d0441cad7f9a4e0a1157"},"schema_version":"1.0","source":{"id":"1611.05473","kind":"arxiv","version":1}},"canonical_sha256":"fc39cdda58dc016f8e4cffec4112a25a4748ec0da79acf6dbedc3c4c0efb7147","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fc39cdda58dc016f8e4cffec4112a25a4748ec0da79acf6dbedc3c4c0efb7147","first_computed_at":"2026-05-18T00:53:57.669271Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:53:57.669271Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"awVLdZJ5Ch5EKdJnX5Ltg0uXu2ahkxiIj88pjiWTcUxarbHXVyKZF6GhTqzmzPmZO5wTZQRPcrgYdTqh46oSDA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:53:57.669999Z","signed_message":"canonical_sha256_bytes"},"source_id":"1611.05473","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:10a8f9985b8f2abc964d742c81be8eef5df8fee46ea69ae1f9dd3d0af6d11a57","sha256:d12e5f01ada19b6455014db9ead87f9fb949b5ad6935f48f5d33d1380e257838"],"state_sha256":"921ff4fdc3c81778acb625566c9001f87e067be960aa4be17070ae8dc3eb74ab"}