{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:2NM3ERWAJXRG25USGROSAWEOSL","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":"b06396802e4ca6e297511e0dc45eace19987112c7fc9ab861dcedb53d8cb48dc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-01-13T12:53:08Z","title_canon_sha256":"5a860d0abccc0acc004e6123e1dee18c17187f9daee14fab36ace94d8993bcb7"},"schema_version":"1.0","source":{"id":"1901.03975","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.03975","created_at":"2026-05-17T23:53:49Z"},{"alias_kind":"arxiv_version","alias_value":"1901.03975v2","created_at":"2026-05-17T23:53:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.03975","created_at":"2026-05-17T23:53:49Z"},{"alias_kind":"pith_short_12","alias_value":"2NM3ERWAJXRG","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_16","alias_value":"2NM3ERWAJXRG25US","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_8","alias_value":"2NM3ERWA","created_at":"2026-05-18T12:33:07Z"}],"graph_snapshots":[{"event_id":"sha256:2cab3c21d6842b6f82ca04af03c0a2062c3ddea7c3cb7de0f5a18fa963f32815","target":"graph","created_at":"2026-05-17T23:53:49Z","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":"Only eleven O-type stars have been confirmed to possess large-scale organized magnetic fields. The presence of a -600G longitudinal magnetic field in the O9.7V star HD54879 with a lower limit of the dipole strength of ~2kG, was discovered a few years ago in the framework of the ESO large program \"B-fields in OB stars\". Our FORS2 spectropolarimetric observations from 2017 October 4 to 2018 February 21 reveal the presence of short and long-term spectral variability and a gradual magnetic field decrease from about -300G down to about -90G. Surprisingly, we discover on the night of 2018 February 1","authors_text":"A.F. Kholtygin, D.D. Sokoloff, E.B. Ryspaeva, M. Kueker, M. Sch\\\"oller, S. Hubrig, S.P. Jarvinen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-01-13T12:53:08Z","title":"A short and sudden increase of the magnetic field strength and the accompanying spectral variability in the O9.7V star HD54879"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.03975","kind":"arxiv","version":2},"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":"sha256:00d95c90e748cbd396e3bc7ee57f9da98cc1dc5e0eb22cf43fb75f30ddf90e81","target":"record","created_at":"2026-05-17T23:53:49Z","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":"b06396802e4ca6e297511e0dc45eace19987112c7fc9ab861dcedb53d8cb48dc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-01-13T12:53:08Z","title_canon_sha256":"5a860d0abccc0acc004e6123e1dee18c17187f9daee14fab36ace94d8993bcb7"},"schema_version":"1.0","source":{"id":"1901.03975","kind":"arxiv","version":2}},"canonical_sha256":"d359b246c04de26d7692345d20588e92f519496aef9607acabbba778df34c8c9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d359b246c04de26d7692345d20588e92f519496aef9607acabbba778df34c8c9","first_computed_at":"2026-05-17T23:53:49.634059Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:53:49.634059Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mati9wcWyFqp4SvxGdB7Mte30vucnsaCXD+JemFs5zI/9MbOprAsilccc/CwdyfG1JTrr02iroJE8QE0y3m4Bg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:53:49.634663Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.03975","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:00d95c90e748cbd396e3bc7ee57f9da98cc1dc5e0eb22cf43fb75f30ddf90e81","sha256:2cab3c21d6842b6f82ca04af03c0a2062c3ddea7c3cb7de0f5a18fa963f32815"],"state_sha256":"ef1fe9f2523f085e3c891b164375721c867de4053ed1a902b592c092fbc47ba3"}