{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:TDVFK5QAFG67DOMYSWENFRS2J2","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":"04c8e2fab54600be806cfe03fe42f8ebb45a7e3748983a0530e686c38fff0197","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-06-19T07:23:26Z","title_canon_sha256":"3b734338564df7484ede7bfb444f323f38895953946d8e3034fc1cd93a03aa6b"},"schema_version":"1.0","source":{"id":"1506.05891","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1506.05891","created_at":"2026-05-18T01:40:57Z"},{"alias_kind":"arxiv_version","alias_value":"1506.05891v1","created_at":"2026-05-18T01:40:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1506.05891","created_at":"2026-05-18T01:40:57Z"},{"alias_kind":"pith_short_12","alias_value":"TDVFK5QAFG67","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"TDVFK5QAFG67DOMY","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"TDVFK5QA","created_at":"2026-05-18T12:29:42Z"}],"graph_snapshots":[{"event_id":"sha256:07907e75743679eed2357efe937954796fa4a84f9dc9d9c7cacca1b3460a2c6e","target":"graph","created_at":"2026-05-18T01:40:57Z","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":"Quasi-periodic oscillations (QPOs) are observed in the optical flux of some polars with typical periods of 1 to 3 s but none have been observed yet in X-rays where a significant part of the accreting energy is released. QPOs are expected and predicted from shock oscillations. Most of the polars have been observed by the XMM-Newton satellite. We made use of the homogeneous set of observations of the polars by XMM-Newton to search for the presence of QPOs in the (0.5-10 keV) energy range and to set significant upper limits for the brightest X-ray polars. We extracted high time-resolution X-ray l","authors_text":"(2) LUTH-Observatoire de Paris, 3), (3) CEA-DAM-DIF), C. Busschaert (2, CEA/DSM/Irfu, C. Michaut (2) ((1) Service Astrophysique-Laboratoire AIM, E. Falize (3), J.M. Bonnet-Bidaud (1), M. Mouchet (2)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-06-19T07:23:26Z","title":"Quasi-periodic oscillations in accreting magnetic white dwarfs I. Observational constraints in X-ray and optical"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1506.05891","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:c86469a482daee6fafc3351bbaaf077b530c0b1c706daef40a0918820a8330ad","target":"record","created_at":"2026-05-18T01:40:57Z","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":"04c8e2fab54600be806cfe03fe42f8ebb45a7e3748983a0530e686c38fff0197","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-06-19T07:23:26Z","title_canon_sha256":"3b734338564df7484ede7bfb444f323f38895953946d8e3034fc1cd93a03aa6b"},"schema_version":"1.0","source":{"id":"1506.05891","kind":"arxiv","version":1}},"canonical_sha256":"98ea55760029bdf1b9989588d2c65a4e8518458b78aefd01c03558aa1815ab3a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"98ea55760029bdf1b9989588d2c65a4e8518458b78aefd01c03558aa1815ab3a","first_computed_at":"2026-05-18T01:40:57.876854Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:40:57.876854Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DdbUmgxSUq75yzoJ1BKIBv+nBSAKqUN5w+k1nkBsUr6BbTRlvI8vwt4mRPrz6VZvyJGRpG8vwSAtvrKv7yTTDA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:40:57.877428Z","signed_message":"canonical_sha256_bytes"},"source_id":"1506.05891","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c86469a482daee6fafc3351bbaaf077b530c0b1c706daef40a0918820a8330ad","sha256:07907e75743679eed2357efe937954796fa4a84f9dc9d9c7cacca1b3460a2c6e"],"state_sha256":"9c30e9446d0780eafa25d21eeb722b8647dbb46e08917d59962b7f17b1432e99"}