{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2001:ZWUG4KARGHFZOK4Y7IERM2SRAF","short_pith_number":"pith:ZWUG4KAR","canonical_record":{"source":{"id":"astro-ph/0101069","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2001-01-04T20:06:44Z","cross_cats_sorted":[],"title_canon_sha256":"800c251b71276eb3cfeacb6e7fd28a6905baf35e7973345408f8ff50bc159127","abstract_canon_sha256":"fd89a743cd0e3d52036583b9ad5e639ba9fe788e6ebcb2ffbdf93ba45a7f540e"},"schema_version":"1.0"},"canonical_sha256":"cda86e281131cb972b98fa09166a51016a25e41d8b07119064869af3541416e1","source":{"kind":"arxiv","id":"astro-ph/0101069","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0101069","created_at":"2026-05-18T04:21:42Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0101069v2","created_at":"2026-05-18T04:21:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0101069","created_at":"2026-05-18T04:21:42Z"},{"alias_kind":"pith_short_12","alias_value":"ZWUG4KARGHFZ","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"ZWUG4KARGHFZOK4Y","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"ZWUG4KAR","created_at":"2026-05-18T12:25:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2001:ZWUG4KARGHFZOK4Y7IERM2SRAF","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0101069","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2001-01-04T20:06:44Z","cross_cats_sorted":[],"title_canon_sha256":"800c251b71276eb3cfeacb6e7fd28a6905baf35e7973345408f8ff50bc159127","abstract_canon_sha256":"fd89a743cd0e3d52036583b9ad5e639ba9fe788e6ebcb2ffbdf93ba45a7f540e"},"schema_version":"1.0"},"canonical_sha256":"cda86e281131cb972b98fa09166a51016a25e41d8b07119064869af3541416e1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:21:42.388870Z","signature_b64":"6WnCsKCCcXQkO7I/nEzNRkFvU81bwoegBQMK5qVbNSsWzVJizU1UwiKMSWHY/TgUYCmY5apSw++N4EQ8drRnBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cda86e281131cb972b98fa09166a51016a25e41d8b07119064869af3541416e1","last_reissued_at":"2026-05-18T04:21:42.388205Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:21:42.388205Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0101069","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":"2026-05-18T04:21:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dM66W2Zbgi6nX0tzguEn2MEbjmTC2U5dpIwjpKFWyvD4k0H7z8TmUAtbQgBwGFopEkO3ooelPO02j2Ah5X2eBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T11:21:10.913259Z"},"content_sha256":"37a970f83f645efc40d62488d58cb63d58a169f8106ccbd0ea50499bc774c2d0","schema_version":"1.0","event_id":"sha256:37a970f83f645efc40d62488d58cb63d58a169f8106ccbd0ea50499bc774c2d0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2001:ZWUG4KARGHFZOK4Y7IERM2SRAF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Comment on the first-order Fermi acceleration at ultra-relativistic shocks","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Bochum), Cracow; ITP, Jagiellonian University, J. Bednarz (Astronomical Obs., M. Ostrowski, Ruhr University","submitted_at":"2001-01-04T20:06:44Z","abstract_excerpt":"The first-order Fermi acceleration process at an ultra-relativistic shock wave is expected to create a particle spectrum with the unique asymptotic spectral index sigma_{gamma >> 1} approximately 2.2. Below, we discuss this result and differences in its various derivations, which -- explicitly or implicitly -- always require highly turbulent conditions downstream of the shock. In the presence of medium amplitude turbulence the generated particle spectrum can be much steeper than the above asymptotic one. We also note problems with application of the pitch angle diffusion model for particle tra"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0101069","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":"2026-05-18T04:21:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5e4IYxzQpFZ/q+tDzZWPU3x45DTcplH2tUZU6oVNW497m/mNKjlTtA9Z4EljNF6xEoIMYmDPgT1C0if+JA+QBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T11:21:10.913617Z"},"content_sha256":"880925703e1455b5246d70fcfa4598e4c8e59e592412b965fb355dc41b264cd9","schema_version":"1.0","event_id":"sha256:880925703e1455b5246d70fcfa4598e4c8e59e592412b965fb355dc41b264cd9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZWUG4KARGHFZOK4Y7IERM2SRAF/bundle.json","state_url":"https://pith.science/pith/ZWUG4KARGHFZOK4Y7IERM2SRAF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZWUG4KARGHFZOK4Y7IERM2SRAF/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":"2026-06-02T11:21:10Z","links":{"resolver":"https://pith.science/pith/ZWUG4KARGHFZOK4Y7IERM2SRAF","bundle":"https://pith.science/pith/ZWUG4KARGHFZOK4Y7IERM2SRAF/bundle.json","state":"https://pith.science/pith/ZWUG4KARGHFZOK4Y7IERM2SRAF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZWUG4KARGHFZOK4Y7IERM2SRAF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2001:ZWUG4KARGHFZOK4Y7IERM2SRAF","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":"fd89a743cd0e3d52036583b9ad5e639ba9fe788e6ebcb2ffbdf93ba45a7f540e","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2001-01-04T20:06:44Z","title_canon_sha256":"800c251b71276eb3cfeacb6e7fd28a6905baf35e7973345408f8ff50bc159127"},"schema_version":"1.0","source":{"id":"astro-ph/0101069","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0101069","created_at":"2026-05-18T04:21:42Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0101069v2","created_at":"2026-05-18T04:21:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0101069","created_at":"2026-05-18T04:21:42Z"},{"alias_kind":"pith_short_12","alias_value":"ZWUG4KARGHFZ","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"ZWUG4KARGHFZOK4Y","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"ZWUG4KAR","created_at":"2026-05-18T12:25:50Z"}],"graph_snapshots":[{"event_id":"sha256:880925703e1455b5246d70fcfa4598e4c8e59e592412b965fb355dc41b264cd9","target":"graph","created_at":"2026-05-18T04:21:42Z","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":"The first-order Fermi acceleration process at an ultra-relativistic shock wave is expected to create a particle spectrum with the unique asymptotic spectral index sigma_{gamma >> 1} approximately 2.2. Below, we discuss this result and differences in its various derivations, which -- explicitly or implicitly -- always require highly turbulent conditions downstream of the shock. In the presence of medium amplitude turbulence the generated particle spectrum can be much steeper than the above asymptotic one. We also note problems with application of the pitch angle diffusion model for particle tra","authors_text":"Bochum), Cracow; ITP, Jagiellonian University, J. Bednarz (Astronomical Obs., M. Ostrowski, Ruhr University","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2001-01-04T20:06:44Z","title":"Comment on the first-order Fermi acceleration at ultra-relativistic shocks"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0101069","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":"sha256:37a970f83f645efc40d62488d58cb63d58a169f8106ccbd0ea50499bc774c2d0","target":"record","created_at":"2026-05-18T04:21:42Z","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":"fd89a743cd0e3d52036583b9ad5e639ba9fe788e6ebcb2ffbdf93ba45a7f540e","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2001-01-04T20:06:44Z","title_canon_sha256":"800c251b71276eb3cfeacb6e7fd28a6905baf35e7973345408f8ff50bc159127"},"schema_version":"1.0","source":{"id":"astro-ph/0101069","kind":"arxiv","version":2}},"canonical_sha256":"cda86e281131cb972b98fa09166a51016a25e41d8b07119064869af3541416e1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cda86e281131cb972b98fa09166a51016a25e41d8b07119064869af3541416e1","first_computed_at":"2026-05-18T04:21:42.388205Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:21:42.388205Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6WnCsKCCcXQkO7I/nEzNRkFvU81bwoegBQMK5qVbNSsWzVJizU1UwiKMSWHY/TgUYCmY5apSw++N4EQ8drRnBA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:21:42.388870Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0101069","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:37a970f83f645efc40d62488d58cb63d58a169f8106ccbd0ea50499bc774c2d0","sha256:880925703e1455b5246d70fcfa4598e4c8e59e592412b965fb355dc41b264cd9"],"state_sha256":"454c6565f90e2b3bc4a32b60917ae4ce4391b211086f8e5c988956f7170cded6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"d7OogFpVl1lVziej2R7E6eHeO1G+zctiTO1BWsxvvtIyVnwMMlZNp2Hc0l8aB9OmMbF46EWdsIrbWJFuog9hBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T11:21:10.915508Z","bundle_sha256":"109546a871f92ac621df4fbae93ac3562c9c58fc0facce7f0c5a250ead620e39"}}