{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:TIWY4BLZINFJAJOCPG4XV3JAYV","short_pith_number":"pith:TIWY4BLZ","canonical_record":{"source":{"id":"0812.1906","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-12-10T12:58:53Z","cross_cats_sorted":[],"title_canon_sha256":"6f5dc1998e2a508749425550cda6c4d454df1b0db06833293edd31aac6e2d8f2","abstract_canon_sha256":"214351f62a74f60361058824a82a6d85b5b9f72c526a554cb7b152413b616893"},"schema_version":"1.0"},"canonical_sha256":"9a2d8e0579434a9025c279b97aed20c5779a9cdd8fb8f4476ec504a5b61ecc5e","source":{"kind":"arxiv","id":"0812.1906","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0812.1906","created_at":"2026-05-18T04:29:24Z"},{"alias_kind":"arxiv_version","alias_value":"0812.1906v1","created_at":"2026-05-18T04:29:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0812.1906","created_at":"2026-05-18T04:29:24Z"},{"alias_kind":"pith_short_12","alias_value":"TIWY4BLZINFJ","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"TIWY4BLZINFJAJOC","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"TIWY4BLZ","created_at":"2026-05-18T12:25:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:TIWY4BLZINFJAJOCPG4XV3JAYV","target":"record","payload":{"canonical_record":{"source":{"id":"0812.1906","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-12-10T12:58:53Z","cross_cats_sorted":[],"title_canon_sha256":"6f5dc1998e2a508749425550cda6c4d454df1b0db06833293edd31aac6e2d8f2","abstract_canon_sha256":"214351f62a74f60361058824a82a6d85b5b9f72c526a554cb7b152413b616893"},"schema_version":"1.0"},"canonical_sha256":"9a2d8e0579434a9025c279b97aed20c5779a9cdd8fb8f4476ec504a5b61ecc5e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:29:24.636292Z","signature_b64":"w93LbquhUyH5P5kEUZEABH+ugN57p7DBTM9rdqJhWrgT+ynQ4tfdX5zKCfKbJjQEKGUipvVnWtB4KCvshjjoBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9a2d8e0579434a9025c279b97aed20c5779a9cdd8fb8f4476ec504a5b61ecc5e","last_reissued_at":"2026-05-18T04:29:24.635799Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:29:24.635799Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0812.1906","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":"2026-05-18T04:29:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KUMvQPiIFSXZ9FhD7Flm0z+LSyYwSesqD42Vt2A6uroVQ1lU0zCHmkVlt8rpYYmNtstUSwGt2jNbAylWNiHxBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T22:27:45.457285Z"},"content_sha256":"012ad0dd8b94809626ea228efee38f258b3ef2da6aa7962229bd2da4ee25aecb","schema_version":"1.0","event_id":"sha256:012ad0dd8b94809626ea228efee38f258b3ef2da6aa7962229bd2da4ee25aecb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:TIWY4BLZINFJAJOCPG4XV3JAYV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Magnetic fields and cosmic rays in GRBs. A self-similar collisionless foreshock","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Mikhail V. Medvedev (KU), Olga V. Zakutnyaya (IKI)","submitted_at":"2008-12-10T12:58:53Z","abstract_excerpt":"Cosmic rays accelerated by a shock form a streaming distribution of outgoing particles in the foreshock region. If the ambient fields are negligible compared to the shock and cosmic ray energetics, a stronger magnetic field can be generated in the shock upstream via the streaming (Weibel-type) instability. Here we develop a self-similar model of the foreshock region and calculate its structure, e.g., the magnetic field strength, its coherence scale, etc., as a function of the distance from the shock. Our model indicates that the entire foreshock region of thickness $\\sim R/(2\\Gamma_{\\rm sh}^2)"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0812.1906","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":""},"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":"2026-05-18T04:29:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"neY74e2M4F9HdtKegb9RO7WB3Q2O+7ME7BjOHEY893Ni8f9dovBp9qdI6DMtdC4BfqketcN4cT1EVAOTjZgfDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T22:27:45.457650Z"},"content_sha256":"f3eed7365ee387e406a36731515a7cfd2e3abf47a10f3b51ebeaafa5c2b79066","schema_version":"1.0","event_id":"sha256:f3eed7365ee387e406a36731515a7cfd2e3abf47a10f3b51ebeaafa5c2b79066"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TIWY4BLZINFJAJOCPG4XV3JAYV/bundle.json","state_url":"https://pith.science/pith/TIWY4BLZINFJAJOCPG4XV3JAYV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TIWY4BLZINFJAJOCPG4XV3JAYV/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":"2026-06-01T22:27:45Z","links":{"resolver":"https://pith.science/pith/TIWY4BLZINFJAJOCPG4XV3JAYV","bundle":"https://pith.science/pith/TIWY4BLZINFJAJOCPG4XV3JAYV/bundle.json","state":"https://pith.science/pith/TIWY4BLZINFJAJOCPG4XV3JAYV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TIWY4BLZINFJAJOCPG4XV3JAYV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:TIWY4BLZINFJAJOCPG4XV3JAYV","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":"214351f62a74f60361058824a82a6d85b5b9f72c526a554cb7b152413b616893","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-12-10T12:58:53Z","title_canon_sha256":"6f5dc1998e2a508749425550cda6c4d454df1b0db06833293edd31aac6e2d8f2"},"schema_version":"1.0","source":{"id":"0812.1906","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0812.1906","created_at":"2026-05-18T04:29:24Z"},{"alias_kind":"arxiv_version","alias_value":"0812.1906v1","created_at":"2026-05-18T04:29:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0812.1906","created_at":"2026-05-18T04:29:24Z"},{"alias_kind":"pith_short_12","alias_value":"TIWY4BLZINFJ","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"TIWY4BLZINFJAJOC","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"TIWY4BLZ","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:f3eed7365ee387e406a36731515a7cfd2e3abf47a10f3b51ebeaafa5c2b79066","target":"graph","created_at":"2026-05-18T04:29:24Z","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":"Cosmic rays accelerated by a shock form a streaming distribution of outgoing particles in the foreshock region. If the ambient fields are negligible compared to the shock and cosmic ray energetics, a stronger magnetic field can be generated in the shock upstream via the streaming (Weibel-type) instability. Here we develop a self-similar model of the foreshock region and calculate its structure, e.g., the magnetic field strength, its coherence scale, etc., as a function of the distance from the shock. Our model indicates that the entire foreshock region of thickness $\\sim R/(2\\Gamma_{\\rm sh}^2)","authors_text":"Mikhail V. Medvedev (KU), Olga V. Zakutnyaya (IKI)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-12-10T12:58:53Z","title":"Magnetic fields and cosmic rays in GRBs. A self-similar collisionless foreshock"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0812.1906","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":"sha256:012ad0dd8b94809626ea228efee38f258b3ef2da6aa7962229bd2da4ee25aecb","target":"record","created_at":"2026-05-18T04:29:24Z","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":"214351f62a74f60361058824a82a6d85b5b9f72c526a554cb7b152413b616893","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-12-10T12:58:53Z","title_canon_sha256":"6f5dc1998e2a508749425550cda6c4d454df1b0db06833293edd31aac6e2d8f2"},"schema_version":"1.0","source":{"id":"0812.1906","kind":"arxiv","version":1}},"canonical_sha256":"9a2d8e0579434a9025c279b97aed20c5779a9cdd8fb8f4476ec504a5b61ecc5e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9a2d8e0579434a9025c279b97aed20c5779a9cdd8fb8f4476ec504a5b61ecc5e","first_computed_at":"2026-05-18T04:29:24.635799Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:29:24.635799Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"w93LbquhUyH5P5kEUZEABH+ugN57p7DBTM9rdqJhWrgT+ynQ4tfdX5zKCfKbJjQEKGUipvVnWtB4KCvshjjoBg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:29:24.636292Z","signed_message":"canonical_sha256_bytes"},"source_id":"0812.1906","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:012ad0dd8b94809626ea228efee38f258b3ef2da6aa7962229bd2da4ee25aecb","sha256:f3eed7365ee387e406a36731515a7cfd2e3abf47a10f3b51ebeaafa5c2b79066"],"state_sha256":"40c4e9bf9d50e59d35b308403c9600b3037784067a63c5ec21b1e83b7662767f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kY8ul2iUU5UZLMypiv8ydHEqqeBvbH0KZtv85VrxHRG6faGqHgfidoBZ+lqRDEcdxTn1J59MAwFzofz9oM4KBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T22:27:45.459567Z","bundle_sha256":"6107cd4be6397415184e2adc6cd00bc6d3378bb33a46b570954cb47183923c73"}}