{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:LF43M6OCVKATSLQZYNE45DMJLG","short_pith_number":"pith:LF43M6OC","canonical_record":{"source":{"id":"2004.01439","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-04-03T09:04:48Z","cross_cats_sorted":[],"title_canon_sha256":"dcd449b0848d55be836c91c4c1122e4dde1eed74e194e87da4075ff351288671","abstract_canon_sha256":"8d89d67aae8cf6c1bd1539517142f41e293868c5fa5d91030a941a9144d2c772"},"schema_version":"1.0"},"canonical_sha256":"5979b679c2aa81392e19c349ce8d89599c89c495fdaa0d66facead0b71709000","source":{"kind":"arxiv","id":"2004.01439","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2004.01439","created_at":"2026-07-05T00:58:51Z"},{"alias_kind":"arxiv_version","alias_value":"2004.01439v1","created_at":"2026-07-05T00:58:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2004.01439","created_at":"2026-07-05T00:58:51Z"},{"alias_kind":"pith_short_12","alias_value":"LF43M6OCVKAT","created_at":"2026-07-05T00:58:51Z"},{"alias_kind":"pith_short_16","alias_value":"LF43M6OCVKATSLQZ","created_at":"2026-07-05T00:58:51Z"},{"alias_kind":"pith_short_8","alias_value":"LF43M6OC","created_at":"2026-07-05T00:58:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:LF43M6OCVKATSLQZYNE45DMJLG","target":"record","payload":{"canonical_record":{"source":{"id":"2004.01439","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-04-03T09:04:48Z","cross_cats_sorted":[],"title_canon_sha256":"dcd449b0848d55be836c91c4c1122e4dde1eed74e194e87da4075ff351288671","abstract_canon_sha256":"8d89d67aae8cf6c1bd1539517142f41e293868c5fa5d91030a941a9144d2c772"},"schema_version":"1.0"},"canonical_sha256":"5979b679c2aa81392e19c349ce8d89599c89c495fdaa0d66facead0b71709000","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:58:51.747794Z","signature_b64":"w+B7T5mY18bnjTjxTfAUdlvHOTenIsegBJEUyeKx3wOUREiAEqzajWazBOMG0EUnEdk3aWiJlgkW4xEUK+arDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5979b679c2aa81392e19c349ce8d89599c89c495fdaa0d66facead0b71709000","last_reissued_at":"2026-07-05T00:58:51.747367Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:58:51.747367Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2004.01439","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":"2026-07-05T00:58:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wI2LDpzIBFV/BvOQpmjC81OhiXsfBkXvz6oEBXUSYFmz+8/vNQQ0ETRm1JaBBQOuGiQHCFtlUN9lb2w/VwlUDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-02T11:37:57.581790Z"},"content_sha256":"3f4815791d3d940b94488dc1431cc595e37e1df119c6398b25d0929a68fe700c","schema_version":"1.0","event_id":"sha256:3f4815791d3d940b94488dc1431cc595e37e1df119c6398b25d0929a68fe700c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:LF43M6OCVKATSLQZYNE45DMJLG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Possible evidence of induced repetitive magnetic reconnection in a superflare from a young solar-type star","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"D. Barghini, D. Telloni, S. Mancuso","submitted_at":"2020-04-03T09:04:48Z","abstract_excerpt":"We report the detection of multiple quasi-periodic pulsations (QPPs) observed during the flaring activity of KIC 8414845, a young, active solar-type star observed by the Kepler mission launched by NASA. We analyzed the QQP signal using a data-driven, nonparametric method called singular spectrum analysis (SSA), which has never been utilized previously for analyzing solar or stellar QPPs. Because it is not based on a prescribed choice of basis functions, SSA is particularly suitable for analyzing nonstationary, nonlinear signals such as those observed in QPPs during major flares. The analysis h"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2004.01439","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2004.01439/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T00:58:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7ih52MxRo7lzWK66NtrRbZpPrnNQ2h8lzPziYiqLEA+SWkeQGqDczjFltaasGl4D8FFOkHt/OPX8iXFVZuL6BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-02T11:37:57.582086Z"},"content_sha256":"0fc738a8a938909114ff6f75f1c113eb1e058f79f2660dbc928278125acfc4cc","schema_version":"1.0","event_id":"sha256:0fc738a8a938909114ff6f75f1c113eb1e058f79f2660dbc928278125acfc4cc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LF43M6OCVKATSLQZYNE45DMJLG/bundle.json","state_url":"https://pith.science/pith/LF43M6OCVKATSLQZYNE45DMJLG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LF43M6OCVKATSLQZYNE45DMJLG/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":"2026-08-02T11:37:57Z","links":{"resolver":"https://pith.science/pith/LF43M6OCVKATSLQZYNE45DMJLG","bundle":"https://pith.science/pith/LF43M6OCVKATSLQZYNE45DMJLG/bundle.json","state":"https://pith.science/pith/LF43M6OCVKATSLQZYNE45DMJLG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LF43M6OCVKATSLQZYNE45DMJLG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:LF43M6OCVKATSLQZYNE45DMJLG","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":"8d89d67aae8cf6c1bd1539517142f41e293868c5fa5d91030a941a9144d2c772","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-04-03T09:04:48Z","title_canon_sha256":"dcd449b0848d55be836c91c4c1122e4dde1eed74e194e87da4075ff351288671"},"schema_version":"1.0","source":{"id":"2004.01439","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2004.01439","created_at":"2026-07-05T00:58:51Z"},{"alias_kind":"arxiv_version","alias_value":"2004.01439v1","created_at":"2026-07-05T00:58:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2004.01439","created_at":"2026-07-05T00:58:51Z"},{"alias_kind":"pith_short_12","alias_value":"LF43M6OCVKAT","created_at":"2026-07-05T00:58:51Z"},{"alias_kind":"pith_short_16","alias_value":"LF43M6OCVKATSLQZ","created_at":"2026-07-05T00:58:51Z"},{"alias_kind":"pith_short_8","alias_value":"LF43M6OC","created_at":"2026-07-05T00:58:51Z"}],"graph_snapshots":[{"event_id":"sha256:0fc738a8a938909114ff6f75f1c113eb1e058f79f2660dbc928278125acfc4cc","target":"graph","created_at":"2026-07-05T00:58:51Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2004.01439/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We report the detection of multiple quasi-periodic pulsations (QPPs) observed during the flaring activity of KIC 8414845, a young, active solar-type star observed by the Kepler mission launched by NASA. We analyzed the QQP signal using a data-driven, nonparametric method called singular spectrum analysis (SSA), which has never been utilized previously for analyzing solar or stellar QPPs. Because it is not based on a prescribed choice of basis functions, SSA is particularly suitable for analyzing nonstationary, nonlinear signals such as those observed in QPPs during major flares. The analysis h","authors_text":"D. Barghini, D. Telloni, S. Mancuso","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-04-03T09:04:48Z","title":"Possible evidence of induced repetitive magnetic reconnection in a superflare from a young solar-type star"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2004.01439","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":"sha256:3f4815791d3d940b94488dc1431cc595e37e1df119c6398b25d0929a68fe700c","target":"record","created_at":"2026-07-05T00:58:51Z","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":"8d89d67aae8cf6c1bd1539517142f41e293868c5fa5d91030a941a9144d2c772","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-04-03T09:04:48Z","title_canon_sha256":"dcd449b0848d55be836c91c4c1122e4dde1eed74e194e87da4075ff351288671"},"schema_version":"1.0","source":{"id":"2004.01439","kind":"arxiv","version":1}},"canonical_sha256":"5979b679c2aa81392e19c349ce8d89599c89c495fdaa0d66facead0b71709000","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5979b679c2aa81392e19c349ce8d89599c89c495fdaa0d66facead0b71709000","first_computed_at":"2026-07-05T00:58:51.747367Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:58:51.747367Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"w+B7T5mY18bnjTjxTfAUdlvHOTenIsegBJEUyeKx3wOUREiAEqzajWazBOMG0EUnEdk3aWiJlgkW4xEUK+arDg==","signature_status":"signed_v1","signed_at":"2026-07-05T00:58:51.747794Z","signed_message":"canonical_sha256_bytes"},"source_id":"2004.01439","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3f4815791d3d940b94488dc1431cc595e37e1df119c6398b25d0929a68fe700c","sha256:0fc738a8a938909114ff6f75f1c113eb1e058f79f2660dbc928278125acfc4cc"],"state_sha256":"6fa7c50c9259356c590cad992db22886e78cec34f0732394908e565ba632a1f5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"culHwu5+Apux8pnM8bYKVJcr2ebvuGRaXeuYiCAZnFYHd4tPQjmfFdq1kpxxqK8TEC4SoD+Kjx9w/In3HbVlCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-02T11:37:57.584544Z","bundle_sha256":"d0132677c324e4c91c5c7a31eab9a9024f186187d51802e481510c9d964ed25c"}}