{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:SYVH5JN3CDVURJS76YJL3534RJ","short_pith_number":"pith:SYVH5JN3","canonical_record":{"source":{"id":"1404.2104","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-04-08T12:26:45Z","cross_cats_sorted":[],"title_canon_sha256":"f586e2d7ab59cc587a72ed67ba0a52f9e7e608344bba6894b9391b654f8d2b32","abstract_canon_sha256":"52a4f7d847afee6bfe119cf0399359a930aa8b71da6912c186b5c9d1bae4f04f"},"schema_version":"1.0"},"canonical_sha256":"962a7ea5bb10eb48a65ff612bdf77c8a79b93ff9f873d52dc976d89aff64afad","source":{"kind":"arxiv","id":"1404.2104","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1404.2104","created_at":"2026-05-18T02:50:50Z"},{"alias_kind":"arxiv_version","alias_value":"1404.2104v2","created_at":"2026-05-18T02:50:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1404.2104","created_at":"2026-05-18T02:50:50Z"},{"alias_kind":"pith_short_12","alias_value":"SYVH5JN3CDVU","created_at":"2026-05-18T12:28:49Z"},{"alias_kind":"pith_short_16","alias_value":"SYVH5JN3CDVURJS7","created_at":"2026-05-18T12:28:49Z"},{"alias_kind":"pith_short_8","alias_value":"SYVH5JN3","created_at":"2026-05-18T12:28:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:SYVH5JN3CDVURJS76YJL3534RJ","target":"record","payload":{"canonical_record":{"source":{"id":"1404.2104","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-04-08T12:26:45Z","cross_cats_sorted":[],"title_canon_sha256":"f586e2d7ab59cc587a72ed67ba0a52f9e7e608344bba6894b9391b654f8d2b32","abstract_canon_sha256":"52a4f7d847afee6bfe119cf0399359a930aa8b71da6912c186b5c9d1bae4f04f"},"schema_version":"1.0"},"canonical_sha256":"962a7ea5bb10eb48a65ff612bdf77c8a79b93ff9f873d52dc976d89aff64afad","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:50:50.145895Z","signature_b64":"+3l79a9k7uJOqHFNBqcsWX62+vf8mEXyhzdxuCEpM7WlXcbs+aI2Vozf799CG++/LoxGpoWzzLbfSP/Bn0mbAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"962a7ea5bb10eb48a65ff612bdf77c8a79b93ff9f873d52dc976d89aff64afad","last_reissued_at":"2026-05-18T02:50:50.145426Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:50:50.145426Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1404.2104","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":"2026-05-18T02:50:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Y1iCaI2H7HLk5adoLweoWQq6A+7Z7u/33YiLe4s5vnQUMfRCshNwtHVv4n//v/gNBBXapE2fjkuTLGMqoOVECQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-23T17:37:59.182248Z"},"content_sha256":"059fc30796373807564adcf608148819131d782eb593a74f85c6504e22082214","schema_version":"1.0","event_id":"sha256:059fc30796373807564adcf608148819131d782eb593a74f85c6504e22082214"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:SYVH5JN3CDVURJS76YJL3534RJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Power requirements for cosmic ray propagation models involving re-acceleration and a comment on second order Fermi acceleration theory","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Andrew Thornbury, Luke O'C. Drury","submitted_at":"2014-04-08T12:26:45Z","abstract_excerpt":"We derive an analytic expression for the power transferred from interstellar turbulence to the Galactic cosmic rays in propagation models which include re-acceleration. This is used to estimate the power required in such models and the relative importance of the primary acceleration as against re-acceleration. The analysis provides a formal mathematical justification for Fermi's heuristic account of second order acceleration in his classic 1949 paper."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1404.2104","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":"2026-05-18T02:50:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"G256seHnO8G8MH9BpmH9QcKM4lPr5zQN5LC9Ij+wm1UcJRD7/TxIeH+ldfSu6kbc6LEo6kv92qJVSpFAMDBlDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-23T17:37:59.182723Z"},"content_sha256":"eecd3fd6c0e24340026dcad1ec11c9f7e8ced5290ab46432c44f615041245d02","schema_version":"1.0","event_id":"sha256:eecd3fd6c0e24340026dcad1ec11c9f7e8ced5290ab46432c44f615041245d02"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SYVH5JN3CDVURJS76YJL3534RJ/bundle.json","state_url":"https://pith.science/pith/SYVH5JN3CDVURJS76YJL3534RJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SYVH5JN3CDVURJS76YJL3534RJ/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":"2026-06-23T17:37:59Z","links":{"resolver":"https://pith.science/pith/SYVH5JN3CDVURJS76YJL3534RJ","bundle":"https://pith.science/pith/SYVH5JN3CDVURJS76YJL3534RJ/bundle.json","state":"https://pith.science/pith/SYVH5JN3CDVURJS76YJL3534RJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SYVH5JN3CDVURJS76YJL3534RJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:SYVH5JN3CDVURJS76YJL3534RJ","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":"52a4f7d847afee6bfe119cf0399359a930aa8b71da6912c186b5c9d1bae4f04f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-04-08T12:26:45Z","title_canon_sha256":"f586e2d7ab59cc587a72ed67ba0a52f9e7e608344bba6894b9391b654f8d2b32"},"schema_version":"1.0","source":{"id":"1404.2104","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1404.2104","created_at":"2026-05-18T02:50:50Z"},{"alias_kind":"arxiv_version","alias_value":"1404.2104v2","created_at":"2026-05-18T02:50:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1404.2104","created_at":"2026-05-18T02:50:50Z"},{"alias_kind":"pith_short_12","alias_value":"SYVH5JN3CDVU","created_at":"2026-05-18T12:28:49Z"},{"alias_kind":"pith_short_16","alias_value":"SYVH5JN3CDVURJS7","created_at":"2026-05-18T12:28:49Z"},{"alias_kind":"pith_short_8","alias_value":"SYVH5JN3","created_at":"2026-05-18T12:28:49Z"}],"graph_snapshots":[{"event_id":"sha256:eecd3fd6c0e24340026dcad1ec11c9f7e8ced5290ab46432c44f615041245d02","target":"graph","created_at":"2026-05-18T02:50:50Z","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":"We derive an analytic expression for the power transferred from interstellar turbulence to the Galactic cosmic rays in propagation models which include re-acceleration. This is used to estimate the power required in such models and the relative importance of the primary acceleration as against re-acceleration. The analysis provides a formal mathematical justification for Fermi's heuristic account of second order acceleration in his classic 1949 paper.","authors_text":"Andrew Thornbury, Luke O'C. Drury","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-04-08T12:26:45Z","title":"Power requirements for cosmic ray propagation models involving re-acceleration and a comment on second order Fermi acceleration theory"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1404.2104","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":"sha256:059fc30796373807564adcf608148819131d782eb593a74f85c6504e22082214","target":"record","created_at":"2026-05-18T02:50:50Z","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":"52a4f7d847afee6bfe119cf0399359a930aa8b71da6912c186b5c9d1bae4f04f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-04-08T12:26:45Z","title_canon_sha256":"f586e2d7ab59cc587a72ed67ba0a52f9e7e608344bba6894b9391b654f8d2b32"},"schema_version":"1.0","source":{"id":"1404.2104","kind":"arxiv","version":2}},"canonical_sha256":"962a7ea5bb10eb48a65ff612bdf77c8a79b93ff9f873d52dc976d89aff64afad","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"962a7ea5bb10eb48a65ff612bdf77c8a79b93ff9f873d52dc976d89aff64afad","first_computed_at":"2026-05-18T02:50:50.145426Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:50:50.145426Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+3l79a9k7uJOqHFNBqcsWX62+vf8mEXyhzdxuCEpM7WlXcbs+aI2Vozf799CG++/LoxGpoWzzLbfSP/Bn0mbAg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:50:50.145895Z","signed_message":"canonical_sha256_bytes"},"source_id":"1404.2104","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:059fc30796373807564adcf608148819131d782eb593a74f85c6504e22082214","sha256:eecd3fd6c0e24340026dcad1ec11c9f7e8ced5290ab46432c44f615041245d02"],"state_sha256":"c3b8cd9c96dab2c5854fb0b94fb71c2e609816e86163acdd33acb1fbdf0a42e5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OdFuFLSjYCvZXtP8dvNzwFcyM3gnE/lts0jedasp/m8Bv0vp3rgOS+TRswFu2g3t9VerWLs4XZ2xCEfxmcI3Cw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-23T17:37:59.185281Z","bundle_sha256":"c5c17db8825f7a5aa9a453bc6c48480cb3c5a4f90a94e747e5f448f94af42989"}}