{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2004:WNNR6AK6J5BXDOXOTXZZ4SYZAQ","short_pith_number":"pith:WNNR6AK6","canonical_record":{"source":{"id":"astro-ph/0407504","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2004-07-23T13:19:03Z","cross_cats_sorted":["physics.plasm-ph"],"title_canon_sha256":"8a63de48b04535ad5bb3219e290db76433d9d2d0eefc7bd6f26f4c96fbbae668","abstract_canon_sha256":"4ceec3c5f6a6a76465d762c09f1b2cb977c62452647867cca4c1e2bf41e75d21"},"schema_version":"1.0"},"canonical_sha256":"b35b1f015e4f4371baee9df39e4b19040c7d46c7dca7310e71b9bbd6d2eb6839","source":{"kind":"arxiv","id":"astro-ph/0407504","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0407504","created_at":"2026-07-04T16:44:22Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0407504v1","created_at":"2026-07-04T16:44:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0407504","created_at":"2026-07-04T16:44:22Z"},{"alias_kind":"pith_short_12","alias_value":"WNNR6AK6J5BX","created_at":"2026-07-04T16:44:22Z"},{"alias_kind":"pith_short_16","alias_value":"WNNR6AK6J5BXDOXO","created_at":"2026-07-04T16:44:22Z"},{"alias_kind":"pith_short_8","alias_value":"WNNR6AK6","created_at":"2026-07-04T16:44:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2004:WNNR6AK6J5BXDOXOTXZZ4SYZAQ","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0407504","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2004-07-23T13:19:03Z","cross_cats_sorted":["physics.plasm-ph"],"title_canon_sha256":"8a63de48b04535ad5bb3219e290db76433d9d2d0eefc7bd6f26f4c96fbbae668","abstract_canon_sha256":"4ceec3c5f6a6a76465d762c09f1b2cb977c62452647867cca4c1e2bf41e75d21"},"schema_version":"1.0"},"canonical_sha256":"b35b1f015e4f4371baee9df39e4b19040c7d46c7dca7310e71b9bbd6d2eb6839","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:44:22.648897Z","signature_b64":"8LSyvVaVVSMV8zcYKN4/5FHH2SpecqWkcFoJrs49zMAhnPlgNayHglFttqECq9UabMZMvz2Ao04EPDcVtVoABg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b35b1f015e4f4371baee9df39e4b19040c7d46c7dca7310e71b9bbd6d2eb6839","last_reissued_at":"2026-07-04T16:44:22.648499Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:44:22.648499Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0407504","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":"2026-07-04T16:44:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HTRhZkOEhgvVGvPkROc0iquphnNAOBPnzUI7Mb56iLabUMYvbfChdnLgfEO6DFAWQAPIq+2iRL/pGDP72vxaAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-04T21:00:26.838337Z"},"content_sha256":"0e686d3ae84b4e2a51f4b63a9513236613346c01e9aa7e95d9f4d4b79ebe49c5","schema_version":"1.0","event_id":"sha256:0e686d3ae84b4e2a51f4b63a9513236613346c01e9aa7e95d9f4d4b79ebe49c5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2004:WNNR6AK6J5BXDOXOTXZZ4SYZAQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Stochastic Fermi Acceleration of sub-Relativistic Electrons and Its Role in Impulsive Solar Flares","license":"","headline":"","cross_cats":["physics.plasm-ph"],"primary_cat":"astro-ph","authors_text":"Eric G. Blackman, Robert Selkowitz","submitted_at":"2004-07-23T13:19:03Z","abstract_excerpt":"We reexamine stochastic Fermi acceleration (STFA) in the low energy (Newtonian) regime in the context of solar flares. The particle energization rate depends a dispersive term and a coherent gain term. The energy dependence of pitch angle scattering is important for determining the electron energy spectrum. For scattering by whistler wave turbulence, STFA produces a quasi-thermal spectrum. A second well-constrained scattering mechanism is needed for STFA to match the observed 10-100keV non-thermal spectrum. We suggest that STFA most plausibly acts as phase one of a two phase particle accelerat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0407504","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/astro-ph/0407504/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":"2026-07-04T16:44:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"c3qtUo9EEyt0awgidzjP1MhYV1Bcwb6hixS6hsJkYITNmJd/Zv0ShopH9bQrIh5F58EBsZadX0e3X9JqgNetDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-04T21:00:26.838715Z"},"content_sha256":"fe1dcb2373a0cc30408d15163fff4a5fbf9cd964e128430d5f9335e9d67fb679","schema_version":"1.0","event_id":"sha256:fe1dcb2373a0cc30408d15163fff4a5fbf9cd964e128430d5f9335e9d67fb679"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WNNR6AK6J5BXDOXOTXZZ4SYZAQ/bundle.json","state_url":"https://pith.science/pith/WNNR6AK6J5BXDOXOTXZZ4SYZAQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WNNR6AK6J5BXDOXOTXZZ4SYZAQ/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":"2026-07-04T21:00:26Z","links":{"resolver":"https://pith.science/pith/WNNR6AK6J5BXDOXOTXZZ4SYZAQ","bundle":"https://pith.science/pith/WNNR6AK6J5BXDOXOTXZZ4SYZAQ/bundle.json","state":"https://pith.science/pith/WNNR6AK6J5BXDOXOTXZZ4SYZAQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WNNR6AK6J5BXDOXOTXZZ4SYZAQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2004:WNNR6AK6J5BXDOXOTXZZ4SYZAQ","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":"4ceec3c5f6a6a76465d762c09f1b2cb977c62452647867cca4c1e2bf41e75d21","cross_cats_sorted":["physics.plasm-ph"],"license":"","primary_cat":"astro-ph","submitted_at":"2004-07-23T13:19:03Z","title_canon_sha256":"8a63de48b04535ad5bb3219e290db76433d9d2d0eefc7bd6f26f4c96fbbae668"},"schema_version":"1.0","source":{"id":"astro-ph/0407504","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0407504","created_at":"2026-07-04T16:44:22Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0407504v1","created_at":"2026-07-04T16:44:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0407504","created_at":"2026-07-04T16:44:22Z"},{"alias_kind":"pith_short_12","alias_value":"WNNR6AK6J5BX","created_at":"2026-07-04T16:44:22Z"},{"alias_kind":"pith_short_16","alias_value":"WNNR6AK6J5BXDOXO","created_at":"2026-07-04T16:44:22Z"},{"alias_kind":"pith_short_8","alias_value":"WNNR6AK6","created_at":"2026-07-04T16:44:22Z"}],"graph_snapshots":[{"event_id":"sha256:fe1dcb2373a0cc30408d15163fff4a5fbf9cd964e128430d5f9335e9d67fb679","target":"graph","created_at":"2026-07-04T16:44:22Z","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/astro-ph/0407504/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We reexamine stochastic Fermi acceleration (STFA) in the low energy (Newtonian) regime in the context of solar flares. The particle energization rate depends a dispersive term and a coherent gain term. The energy dependence of pitch angle scattering is important for determining the electron energy spectrum. For scattering by whistler wave turbulence, STFA produces a quasi-thermal spectrum. A second well-constrained scattering mechanism is needed for STFA to match the observed 10-100keV non-thermal spectrum. We suggest that STFA most plausibly acts as phase one of a two phase particle accelerat","authors_text":"Eric G. Blackman, Robert Selkowitz","cross_cats":["physics.plasm-ph"],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2004-07-23T13:19:03Z","title":"Stochastic Fermi Acceleration of sub-Relativistic Electrons and Its Role in Impulsive Solar Flares"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0407504","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":"sha256:0e686d3ae84b4e2a51f4b63a9513236613346c01e9aa7e95d9f4d4b79ebe49c5","target":"record","created_at":"2026-07-04T16:44:22Z","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":"4ceec3c5f6a6a76465d762c09f1b2cb977c62452647867cca4c1e2bf41e75d21","cross_cats_sorted":["physics.plasm-ph"],"license":"","primary_cat":"astro-ph","submitted_at":"2004-07-23T13:19:03Z","title_canon_sha256":"8a63de48b04535ad5bb3219e290db76433d9d2d0eefc7bd6f26f4c96fbbae668"},"schema_version":"1.0","source":{"id":"astro-ph/0407504","kind":"arxiv","version":1}},"canonical_sha256":"b35b1f015e4f4371baee9df39e4b19040c7d46c7dca7310e71b9bbd6d2eb6839","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b35b1f015e4f4371baee9df39e4b19040c7d46c7dca7310e71b9bbd6d2eb6839","first_computed_at":"2026-07-04T16:44:22.648499Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:44:22.648499Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8LSyvVaVVSMV8zcYKN4/5FHH2SpecqWkcFoJrs49zMAhnPlgNayHglFttqECq9UabMZMvz2Ao04EPDcVtVoABg==","signature_status":"signed_v1","signed_at":"2026-07-04T16:44:22.648897Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0407504","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0e686d3ae84b4e2a51f4b63a9513236613346c01e9aa7e95d9f4d4b79ebe49c5","sha256:fe1dcb2373a0cc30408d15163fff4a5fbf9cd964e128430d5f9335e9d67fb679"],"state_sha256":"2a6a10a6132d8f59da752bfe36c1fdaeb9b94f977695be347a176fad9d73030d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"E4YMSIzJlE+EafxosHkzN2zQLv3tbJnIBGriklX1iiF4xDux5C6rWMFrrpzd+Qo3F7OyK8MSOUwgGqKvX0gLAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-04T21:00:26.840752Z","bundle_sha256":"d49daedd2d8c18d9673cac0015b84a4a1d48bfca0dd9b7dd3356a0034e3879df"}}