{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:535SMQP7RT5AVL4QTGN27Y2MTB","short_pith_number":"pith:535SMQP7","canonical_record":{"source":{"id":"1401.5749","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-01-22T18:33:00Z","cross_cats_sorted":[],"title_canon_sha256":"e2374be669d072f50cd88fda8672be5f40aef42e27e21dabeaabe7555c97b988","abstract_canon_sha256":"77c9cf2fdcd42aae4647e3d7472a0aae59133f80ad745423f5430ab5a2885e78"},"schema_version":"1.0"},"canonical_sha256":"eefb2641ff8cfa0aaf90999bafe34c984fd4b438866e6fdefad3e97f3324f7ea","source":{"kind":"arxiv","id":"1401.5749","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1401.5749","created_at":"2026-05-18T01:45:17Z"},{"alias_kind":"arxiv_version","alias_value":"1401.5749v1","created_at":"2026-05-18T01:45:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1401.5749","created_at":"2026-05-18T01:45:17Z"},{"alias_kind":"pith_short_12","alias_value":"535SMQP7RT5A","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_16","alias_value":"535SMQP7RT5AVL4Q","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_8","alias_value":"535SMQP7","created_at":"2026-05-18T12:28:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:535SMQP7RT5AVL4QTGN27Y2MTB","target":"record","payload":{"canonical_record":{"source":{"id":"1401.5749","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-01-22T18:33:00Z","cross_cats_sorted":[],"title_canon_sha256":"e2374be669d072f50cd88fda8672be5f40aef42e27e21dabeaabe7555c97b988","abstract_canon_sha256":"77c9cf2fdcd42aae4647e3d7472a0aae59133f80ad745423f5430ab5a2885e78"},"schema_version":"1.0"},"canonical_sha256":"eefb2641ff8cfa0aaf90999bafe34c984fd4b438866e6fdefad3e97f3324f7ea","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:45:17.864965Z","signature_b64":"46gAVYHgErW5r/J3iPZdy0+PI/9872BllMOI//pVX+srIXTGWMiisLciBFHLos4Nt1ZbZPWBz0CPpddwWR9yCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"eefb2641ff8cfa0aaf90999bafe34c984fd4b438866e6fdefad3e97f3324f7ea","last_reissued_at":"2026-05-18T01:45:17.864296Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:45:17.864296Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1401.5749","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":"2026-05-18T01:45:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xACzwY4SRdvMJnkVNRH5MHcCWOln/K357FGryp2A18vwr+j08YdIi5NTHjV2RvcKTw2femMig56euf8GudNUCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-02T18:22:06.583965Z"},"content_sha256":"fc777ff5819927c49e2c7ba03d3d94711d7674289635c54bff463d212f63bdb4","schema_version":"1.0","event_id":"sha256:fc777ff5819927c49e2c7ba03d3d94711d7674289635c54bff463d212f63bdb4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:535SMQP7RT5AVL4QTGN27Y2MTB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Detecting and quantifying stellar magnetic fields -- Sparse Stokes profile approximation using orthogonal matching pursuit","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"K.G. Strassmeier, T.A. Carroll","submitted_at":"2014-01-22T18:33:00Z","abstract_excerpt":"In the recent years, we have seen a rapidly growing number of stellar magnetic field detections for various types of stars. Many of these magnetic fields are estimated from spectropolarimetric observations (Stokes V) by using the so-called center-of-gravity (COG) method. Unfortunately, the accuracy of this method rapidly deteriorates with increasing noise and thus calls for a more robust procedure that combines signal detection and field estimation. We introduce an estimation method that provides not only the effective or mean longitudinal magnetic field from an observed Stokes V profile but a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1401.5749","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":""},"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":"2026-05-18T01:45:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"s2DWqgaRKMQfRDYGxz/ZrJSTNmtlLFfTFkiv7cA66RF2WrwYTcSm0i2t2I5X7k1E9IYTnYzWOz1UJ/ZK9LANDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-02T18:22:06.584364Z"},"content_sha256":"da0d90c0ea5ba8a34428b3203eb8d5c596c42ab2d163930335dacfc9b5a29fe2","schema_version":"1.0","event_id":"sha256:da0d90c0ea5ba8a34428b3203eb8d5c596c42ab2d163930335dacfc9b5a29fe2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/535SMQP7RT5AVL4QTGN27Y2MTB/bundle.json","state_url":"https://pith.science/pith/535SMQP7RT5AVL4QTGN27Y2MTB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/535SMQP7RT5AVL4QTGN27Y2MTB/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":"2026-07-02T18:22:06Z","links":{"resolver":"https://pith.science/pith/535SMQP7RT5AVL4QTGN27Y2MTB","bundle":"https://pith.science/pith/535SMQP7RT5AVL4QTGN27Y2MTB/bundle.json","state":"https://pith.science/pith/535SMQP7RT5AVL4QTGN27Y2MTB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/535SMQP7RT5AVL4QTGN27Y2MTB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:535SMQP7RT5AVL4QTGN27Y2MTB","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":"77c9cf2fdcd42aae4647e3d7472a0aae59133f80ad745423f5430ab5a2885e78","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-01-22T18:33:00Z","title_canon_sha256":"e2374be669d072f50cd88fda8672be5f40aef42e27e21dabeaabe7555c97b988"},"schema_version":"1.0","source":{"id":"1401.5749","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1401.5749","created_at":"2026-05-18T01:45:17Z"},{"alias_kind":"arxiv_version","alias_value":"1401.5749v1","created_at":"2026-05-18T01:45:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1401.5749","created_at":"2026-05-18T01:45:17Z"},{"alias_kind":"pith_short_12","alias_value":"535SMQP7RT5A","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_16","alias_value":"535SMQP7RT5AVL4Q","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_8","alias_value":"535SMQP7","created_at":"2026-05-18T12:28:14Z"}],"graph_snapshots":[{"event_id":"sha256:da0d90c0ea5ba8a34428b3203eb8d5c596c42ab2d163930335dacfc9b5a29fe2","target":"graph","created_at":"2026-05-18T01:45:17Z","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":"In the recent years, we have seen a rapidly growing number of stellar magnetic field detections for various types of stars. Many of these magnetic fields are estimated from spectropolarimetric observations (Stokes V) by using the so-called center-of-gravity (COG) method. Unfortunately, the accuracy of this method rapidly deteriorates with increasing noise and thus calls for a more robust procedure that combines signal detection and field estimation. We introduce an estimation method that provides not only the effective or mean longitudinal magnetic field from an observed Stokes V profile but a","authors_text":"K.G. Strassmeier, T.A. Carroll","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-01-22T18:33:00Z","title":"Detecting and quantifying stellar magnetic fields -- Sparse Stokes profile approximation using orthogonal matching pursuit"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1401.5749","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:fc777ff5819927c49e2c7ba03d3d94711d7674289635c54bff463d212f63bdb4","target":"record","created_at":"2026-05-18T01:45:17Z","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":"77c9cf2fdcd42aae4647e3d7472a0aae59133f80ad745423f5430ab5a2885e78","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-01-22T18:33:00Z","title_canon_sha256":"e2374be669d072f50cd88fda8672be5f40aef42e27e21dabeaabe7555c97b988"},"schema_version":"1.0","source":{"id":"1401.5749","kind":"arxiv","version":1}},"canonical_sha256":"eefb2641ff8cfa0aaf90999bafe34c984fd4b438866e6fdefad3e97f3324f7ea","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"eefb2641ff8cfa0aaf90999bafe34c984fd4b438866e6fdefad3e97f3324f7ea","first_computed_at":"2026-05-18T01:45:17.864296Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:45:17.864296Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"46gAVYHgErW5r/J3iPZdy0+PI/9872BllMOI//pVX+srIXTGWMiisLciBFHLos4Nt1ZbZPWBz0CPpddwWR9yCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:45:17.864965Z","signed_message":"canonical_sha256_bytes"},"source_id":"1401.5749","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fc777ff5819927c49e2c7ba03d3d94711d7674289635c54bff463d212f63bdb4","sha256:da0d90c0ea5ba8a34428b3203eb8d5c596c42ab2d163930335dacfc9b5a29fe2"],"state_sha256":"509c757b29544d30bbbb5cc5043ab4c494a41954dee4ce2277e622387036349f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IzSIS56cxBRY3Uf1avtMCrusxR0sunogH1p0a2mrfM5m4a/XRFrNvwdFeYqAOaIjLhezFzsVMt5SKHdAVdD9BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-02T18:22:06.586245Z","bundle_sha256":"008dcecb7671f4b6607fa987221e2dc173f560496e27d15b373f075a326f0acd"}}