{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:B4UCSSZOQQXOYXYKFB3B7BM2LI","short_pith_number":"pith:B4UCSSZO","canonical_record":{"source":{"id":"1902.06602","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-02-18T14:58:42Z","cross_cats_sorted":["physics.space-ph"],"title_canon_sha256":"284d308e47c3131b6179c27c87eaafe9d03efe0819849c9ec5bac8321d0661ec","abstract_canon_sha256":"e509965e50b67b6496c3502166876d2135d52fcbe55fa374148c805a97f2dee6"},"schema_version":"1.0"},"canonical_sha256":"0f28294b2e842eec5f0a28761f859a5a05edfe458a3429eccb7f6ff9864f9925","source":{"kind":"arxiv","id":"1902.06602","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.06602","created_at":"2026-05-17T23:49:38Z"},{"alias_kind":"arxiv_version","alias_value":"1902.06602v2","created_at":"2026-05-17T23:49:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.06602","created_at":"2026-05-17T23:49:38Z"},{"alias_kind":"pith_short_12","alias_value":"B4UCSSZOQQXO","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_16","alias_value":"B4UCSSZOQQXOYXYK","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_8","alias_value":"B4UCSSZO","created_at":"2026-05-18T12:33:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:B4UCSSZOQQXOYXYKFB3B7BM2LI","target":"record","payload":{"canonical_record":{"source":{"id":"1902.06602","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-02-18T14:58:42Z","cross_cats_sorted":["physics.space-ph"],"title_canon_sha256":"284d308e47c3131b6179c27c87eaafe9d03efe0819849c9ec5bac8321d0661ec","abstract_canon_sha256":"e509965e50b67b6496c3502166876d2135d52fcbe55fa374148c805a97f2dee6"},"schema_version":"1.0"},"canonical_sha256":"0f28294b2e842eec5f0a28761f859a5a05edfe458a3429eccb7f6ff9864f9925","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:49:38.960833Z","signature_b64":"Yxmi/F3PkLDlBi9DZ5zA01BycNeYYmzWPQWgiXs9ntsq7Lf06ghqG7BZTgi6fWnNR91XEdc6TYeJtwQ+wDrkAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0f28294b2e842eec5f0a28761f859a5a05edfe458a3429eccb7f6ff9864f9925","last_reissued_at":"2026-05-17T23:49:38.960388Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:49:38.960388Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1902.06602","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:49:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+F5qStholM/bUXNG47HR2iU8FcyHFcPkWDGMOqSQ+wRpbyqUbWL6g5Z+ox+WjLJeplRFqWkZwk16SMi57z/tBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T12:41:21.820604Z"},"content_sha256":"7de1a3dc1c7d4b996df2908bde9f90cf9af0104ae282e24f77fd6738b73da620","schema_version":"1.0","event_id":"sha256:7de1a3dc1c7d4b996df2908bde9f90cf9af0104ae282e24f77fd6738b73da620"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:B4UCSSZOQQXOYXYKFB3B7BM2LI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Full inversion of solar relativistic electron events measured by the Helios spacecraft","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":["physics.space-ph"],"primary_cat":"astro-ph.SR","authors_text":"4). ((1) Dep. F\\'isica Qu\\`antica i Astrof\\'isica, Angels Aran (1), Applied Physics Laboratory, Barcelona, Bernd Heber (2), Daniel Pacheco (1), David Lario (3, Germany (3) The Johns Hopkins University, Greenbelt, Heliophysics Science Division, Institut de Ci\\`encies del Cosmos (ICCUB), Laurel, Maryland, Neus Agueda (1), Spain. (2) Institut f\\\"ur Experimentelle und Angewandte Physik, Universitat de Barcelona, University of Kiel, USA), USA (4) Now at NASA Goddard Space Flight Center","submitted_at":"2019-02-18T14:58:42Z","abstract_excerpt":"Up to present, the largest data set of SEP events in the inner heliosphere are the observations by the two Helios spacecraft. We re-visit a sample of 15 solar relativistic electron events measured by the Helios mission with the goal of better characterising the injection histories of solar energetic particles and their interplanetary transport conditions at heliocentric distances <1 AU. The measurements provided by the E6 instrument on board Helios provide us with the electron directional distributions in eight different sectors that we use to infer the detailed evolution of the electron pitch"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.06602","kind":"arxiv","version":2},"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":"2026-05-17T23:49:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"phd6S9nX6MjXN4Tp71/1hknB2gxRSqZs+9W51ucFkole323nvGZ+jCww+AbVHmJRd9S8nr3Lu5vIMHVE30dUBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T12:41:21.821289Z"},"content_sha256":"f56d66a8343f202529ea6a57efd3748bebb8cc85553c8ce764b6c3a3521d7672","schema_version":"1.0","event_id":"sha256:f56d66a8343f202529ea6a57efd3748bebb8cc85553c8ce764b6c3a3521d7672"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/B4UCSSZOQQXOYXYKFB3B7BM2LI/bundle.json","state_url":"https://pith.science/pith/B4UCSSZOQQXOYXYKFB3B7BM2LI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/B4UCSSZOQQXOYXYKFB3B7BM2LI/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":"2026-05-27T12:41:21Z","links":{"resolver":"https://pith.science/pith/B4UCSSZOQQXOYXYKFB3B7BM2LI","bundle":"https://pith.science/pith/B4UCSSZOQQXOYXYKFB3B7BM2LI/bundle.json","state":"https://pith.science/pith/B4UCSSZOQQXOYXYKFB3B7BM2LI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/B4UCSSZOQQXOYXYKFB3B7BM2LI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:B4UCSSZOQQXOYXYKFB3B7BM2LI","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":"e509965e50b67b6496c3502166876d2135d52fcbe55fa374148c805a97f2dee6","cross_cats_sorted":["physics.space-ph"],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-02-18T14:58:42Z","title_canon_sha256":"284d308e47c3131b6179c27c87eaafe9d03efe0819849c9ec5bac8321d0661ec"},"schema_version":"1.0","source":{"id":"1902.06602","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.06602","created_at":"2026-05-17T23:49:38Z"},{"alias_kind":"arxiv_version","alias_value":"1902.06602v2","created_at":"2026-05-17T23:49:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.06602","created_at":"2026-05-17T23:49:38Z"},{"alias_kind":"pith_short_12","alias_value":"B4UCSSZOQQXO","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_16","alias_value":"B4UCSSZOQQXOYXYK","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_8","alias_value":"B4UCSSZO","created_at":"2026-05-18T12:33:12Z"}],"graph_snapshots":[{"event_id":"sha256:f56d66a8343f202529ea6a57efd3748bebb8cc85553c8ce764b6c3a3521d7672","target":"graph","created_at":"2026-05-17T23:49:38Z","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":"Up to present, the largest data set of SEP events in the inner heliosphere are the observations by the two Helios spacecraft. We re-visit a sample of 15 solar relativistic electron events measured by the Helios mission with the goal of better characterising the injection histories of solar energetic particles and their interplanetary transport conditions at heliocentric distances <1 AU. The measurements provided by the E6 instrument on board Helios provide us with the electron directional distributions in eight different sectors that we use to infer the detailed evolution of the electron pitch","authors_text":"4). ((1) Dep. F\\'isica Qu\\`antica i Astrof\\'isica, Angels Aran (1), Applied Physics Laboratory, Barcelona, Bernd Heber (2), Daniel Pacheco (1), David Lario (3, Germany (3) The Johns Hopkins University, Greenbelt, Heliophysics Science Division, Institut de Ci\\`encies del Cosmos (ICCUB), Laurel, Maryland, Neus Agueda (1), Spain. (2) Institut f\\\"ur Experimentelle und Angewandte Physik, Universitat de Barcelona, University of Kiel, USA), USA (4) Now at NASA Goddard Space Flight Center","cross_cats":["physics.space-ph"],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-02-18T14:58:42Z","title":"Full inversion of solar relativistic electron events measured by the Helios spacecraft"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.06602","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":"sha256:7de1a3dc1c7d4b996df2908bde9f90cf9af0104ae282e24f77fd6738b73da620","target":"record","created_at":"2026-05-17T23:49:38Z","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":"e509965e50b67b6496c3502166876d2135d52fcbe55fa374148c805a97f2dee6","cross_cats_sorted":["physics.space-ph"],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-02-18T14:58:42Z","title_canon_sha256":"284d308e47c3131b6179c27c87eaafe9d03efe0819849c9ec5bac8321d0661ec"},"schema_version":"1.0","source":{"id":"1902.06602","kind":"arxiv","version":2}},"canonical_sha256":"0f28294b2e842eec5f0a28761f859a5a05edfe458a3429eccb7f6ff9864f9925","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0f28294b2e842eec5f0a28761f859a5a05edfe458a3429eccb7f6ff9864f9925","first_computed_at":"2026-05-17T23:49:38.960388Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:49:38.960388Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Yxmi/F3PkLDlBi9DZ5zA01BycNeYYmzWPQWgiXs9ntsq7Lf06ghqG7BZTgi6fWnNR91XEdc6TYeJtwQ+wDrkAg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:49:38.960833Z","signed_message":"canonical_sha256_bytes"},"source_id":"1902.06602","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7de1a3dc1c7d4b996df2908bde9f90cf9af0104ae282e24f77fd6738b73da620","sha256:f56d66a8343f202529ea6a57efd3748bebb8cc85553c8ce764b6c3a3521d7672"],"state_sha256":"bc40b2ea00a60ba3c6e81d624fdffe1f4453896849a157e667397a1bdce75d26"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LmbOkSgSgGRwdQoDEZzulxT5KFswY/G0TdszoQT7bdHNcn1AyzcW/8htLWdWvJB/jnj58IDI+wpkyjhKv8PaAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T12:41:21.825018Z","bundle_sha256":"c9378af59a23f21cefa9e6f3ef7bda609e3a6d2dd58433c96166aac54bf1852e"}}