{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:NF4IWE7G564I4QVJIMNAVJVTEH","short_pith_number":"pith:NF4IWE7G","canonical_record":{"source":{"id":"1301.1680","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-01-08T21:00:00Z","cross_cats_sorted":[],"title_canon_sha256":"203665d62952310f2964eed0f08458ac9874c85e0a2c7bc8a5b19e28c8f0f7f3","abstract_canon_sha256":"c90e34d46d8be05b778dfa550e0583029c033a214d6ea94eabae6d8f3ab29553"},"schema_version":"1.0"},"canonical_sha256":"69788b13e6efb88e42a9431a0aa6b321c6f96bd2b84a03f48f1775a4c1f77c74","source":{"kind":"arxiv","id":"1301.1680","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1301.1680","created_at":"2026-05-18T01:52:14Z"},{"alias_kind":"arxiv_version","alias_value":"1301.1680v1","created_at":"2026-05-18T01:52:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1301.1680","created_at":"2026-05-18T01:52:14Z"},{"alias_kind":"pith_short_12","alias_value":"NF4IWE7G564I","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_16","alias_value":"NF4IWE7G564I4QVJ","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_8","alias_value":"NF4IWE7G","created_at":"2026-05-18T12:27:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:NF4IWE7G564I4QVJIMNAVJVTEH","target":"record","payload":{"canonical_record":{"source":{"id":"1301.1680","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-01-08T21:00:00Z","cross_cats_sorted":[],"title_canon_sha256":"203665d62952310f2964eed0f08458ac9874c85e0a2c7bc8a5b19e28c8f0f7f3","abstract_canon_sha256":"c90e34d46d8be05b778dfa550e0583029c033a214d6ea94eabae6d8f3ab29553"},"schema_version":"1.0"},"canonical_sha256":"69788b13e6efb88e42a9431a0aa6b321c6f96bd2b84a03f48f1775a4c1f77c74","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:52:14.874950Z","signature_b64":"gwxGBuX8ncTqBmgnCyg5Dbp5N2FFNHXXBDTgokEgH/IS5Hx7IWUnmr9R6BmfCkquQsSU+vm1vjfpifgPB4wlBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"69788b13e6efb88e42a9431a0aa6b321c6f96bd2b84a03f48f1775a4c1f77c74","last_reissued_at":"2026-05-18T01:52:14.874131Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:52:14.874131Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1301.1680","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":"2026-05-18T01:52:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NXDT846Dws7lZYoxE+7EyadrSPgOnPX5g2q9kAX4uD9tCGHskDQ+XqvO4GQfC8iDIsAm3+d5PdEscDQOwY4WBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T13:14:46.369280Z"},"content_sha256":"2344b30970ff56934f2e58cbf0bcf80a5b0a42c39dec10e01ee46a6a8f7b970e","schema_version":"1.0","event_id":"sha256:2344b30970ff56934f2e58cbf0bcf80a5b0a42c39dec10e01ee46a6a8f7b970e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:NF4IWE7G564I4QVJIMNAVJVTEH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Magnetic field topology of the RS CVn star II Pegasi","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"I. Ilyin, M. J. Mantere, O. Kochukhov, T. Hackman","submitted_at":"2013-01-08T21:00:00Z","abstract_excerpt":"The dynamo processes in cool active stars generate complex magnetic fields responsible for prominent surface stellar activity and variability at different time scales. For a small number of cool stars magnetic field topologies were reconstructed from the time series of spectropolarimetric observations using the Zeeman Doppler imaging (ZDI) method. In this study we follow a long-term evolution of the magnetic field topology of the RS CVn binary star II Peg. We collected high-resolution circular polarisation observations of II Peg using the SOFIN spectropolarimeter at the Nordic Optical Telescop"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1301.1680","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":"2026-05-18T01:52:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"k229r5/AnlXG5q+jYLUV1p9tAANvflxSU8Y5ulsjoCYAK6XoW7dVnNpwa2puqBb2q3MvujSipef3o51pyDn4BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T13:14:46.369637Z"},"content_sha256":"7428d91b97ac26d1b3853492cfad6f72e3844f7fe6469272ff75e366c37207da","schema_version":"1.0","event_id":"sha256:7428d91b97ac26d1b3853492cfad6f72e3844f7fe6469272ff75e366c37207da"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NF4IWE7G564I4QVJIMNAVJVTEH/bundle.json","state_url":"https://pith.science/pith/NF4IWE7G564I4QVJIMNAVJVTEH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NF4IWE7G564I4QVJIMNAVJVTEH/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":"2026-05-30T13:14:46Z","links":{"resolver":"https://pith.science/pith/NF4IWE7G564I4QVJIMNAVJVTEH","bundle":"https://pith.science/pith/NF4IWE7G564I4QVJIMNAVJVTEH/bundle.json","state":"https://pith.science/pith/NF4IWE7G564I4QVJIMNAVJVTEH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NF4IWE7G564I4QVJIMNAVJVTEH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:NF4IWE7G564I4QVJIMNAVJVTEH","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":"c90e34d46d8be05b778dfa550e0583029c033a214d6ea94eabae6d8f3ab29553","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-01-08T21:00:00Z","title_canon_sha256":"203665d62952310f2964eed0f08458ac9874c85e0a2c7bc8a5b19e28c8f0f7f3"},"schema_version":"1.0","source":{"id":"1301.1680","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1301.1680","created_at":"2026-05-18T01:52:14Z"},{"alias_kind":"arxiv_version","alias_value":"1301.1680v1","created_at":"2026-05-18T01:52:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1301.1680","created_at":"2026-05-18T01:52:14Z"},{"alias_kind":"pith_short_12","alias_value":"NF4IWE7G564I","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_16","alias_value":"NF4IWE7G564I4QVJ","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_8","alias_value":"NF4IWE7G","created_at":"2026-05-18T12:27:52Z"}],"graph_snapshots":[{"event_id":"sha256:7428d91b97ac26d1b3853492cfad6f72e3844f7fe6469272ff75e366c37207da","target":"graph","created_at":"2026-05-18T01:52:14Z","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":"The dynamo processes in cool active stars generate complex magnetic fields responsible for prominent surface stellar activity and variability at different time scales. For a small number of cool stars magnetic field topologies were reconstructed from the time series of spectropolarimetric observations using the Zeeman Doppler imaging (ZDI) method. In this study we follow a long-term evolution of the magnetic field topology of the RS CVn binary star II Peg. We collected high-resolution circular polarisation observations of II Peg using the SOFIN spectropolarimeter at the Nordic Optical Telescop","authors_text":"I. Ilyin, M. J. Mantere, O. Kochukhov, T. Hackman","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-01-08T21:00:00Z","title":"Magnetic field topology of the RS CVn star II Pegasi"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1301.1680","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":"sha256:2344b30970ff56934f2e58cbf0bcf80a5b0a42c39dec10e01ee46a6a8f7b970e","target":"record","created_at":"2026-05-18T01:52:14Z","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":"c90e34d46d8be05b778dfa550e0583029c033a214d6ea94eabae6d8f3ab29553","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-01-08T21:00:00Z","title_canon_sha256":"203665d62952310f2964eed0f08458ac9874c85e0a2c7bc8a5b19e28c8f0f7f3"},"schema_version":"1.0","source":{"id":"1301.1680","kind":"arxiv","version":1}},"canonical_sha256":"69788b13e6efb88e42a9431a0aa6b321c6f96bd2b84a03f48f1775a4c1f77c74","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"69788b13e6efb88e42a9431a0aa6b321c6f96bd2b84a03f48f1775a4c1f77c74","first_computed_at":"2026-05-18T01:52:14.874131Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:52:14.874131Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gwxGBuX8ncTqBmgnCyg5Dbp5N2FFNHXXBDTgokEgH/IS5Hx7IWUnmr9R6BmfCkquQsSU+vm1vjfpifgPB4wlBg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:52:14.874950Z","signed_message":"canonical_sha256_bytes"},"source_id":"1301.1680","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2344b30970ff56934f2e58cbf0bcf80a5b0a42c39dec10e01ee46a6a8f7b970e","sha256:7428d91b97ac26d1b3853492cfad6f72e3844f7fe6469272ff75e366c37207da"],"state_sha256":"6f01429d369920217e3e947193268e6eef85b9b38288bfc3146f10d581ea0de1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FR1Baupr7YHD0QZ0faBdejpZIXWIesvT4ScrbT5EPBNNbLe79nC1QdryUeLe28WShfmGZo3muwNvyeWME/4+AA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T13:14:46.371552Z","bundle_sha256":"10a08fa4951d8fa1ff3bc64d40fd05264cfd8fb9f6ec56c7f850aee986abad68"}}