{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1999:WQOVHJXY4HGXW2N6S4S2RQAA3O","short_pith_number":"pith:WQOVHJXY","canonical_record":{"source":{"id":"astro-ph/9911154","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1999-11-09T20:58:48Z","cross_cats_sorted":[],"title_canon_sha256":"facc8032a9b23fc34bfc07c877ae10c1a42ccd8ff45110f256bc29dc8b6a660b","abstract_canon_sha256":"3089ffe9e1ca433bab38a4d2a0d84cd0c57aa6773ac9d0c21546e2d7e217e297"},"schema_version":"1.0"},"canonical_sha256":"b41d53a6f8e1cd7b69be9725a8c000dbb50d0b3fbe8ba4d47479607ea9e92731","source":{"kind":"arxiv","id":"astro-ph/9911154","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9911154","created_at":"2026-07-04T14:17:18Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9911154v1","created_at":"2026-07-04T14:17:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9911154","created_at":"2026-07-04T14:17:18Z"},{"alias_kind":"pith_short_12","alias_value":"WQOVHJXY4HGX","created_at":"2026-07-04T14:17:18Z"},{"alias_kind":"pith_short_16","alias_value":"WQOVHJXY4HGXW2N6","created_at":"2026-07-04T14:17:18Z"},{"alias_kind":"pith_short_8","alias_value":"WQOVHJXY","created_at":"2026-07-04T14:17:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1999:WQOVHJXY4HGXW2N6S4S2RQAA3O","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/9911154","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1999-11-09T20:58:48Z","cross_cats_sorted":[],"title_canon_sha256":"facc8032a9b23fc34bfc07c877ae10c1a42ccd8ff45110f256bc29dc8b6a660b","abstract_canon_sha256":"3089ffe9e1ca433bab38a4d2a0d84cd0c57aa6773ac9d0c21546e2d7e217e297"},"schema_version":"1.0"},"canonical_sha256":"b41d53a6f8e1cd7b69be9725a8c000dbb50d0b3fbe8ba4d47479607ea9e92731","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T14:17:18.202153Z","signature_b64":"mc1pM3WjxBZH/s6M/AKbSKlCMBZUoJOVXTbbDc2oEDxyQ+IjDF+IH5tMz0R128yhgBl1meNcoaIyand8D+MyCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b41d53a6f8e1cd7b69be9725a8c000dbb50d0b3fbe8ba4d47479607ea9e92731","last_reissued_at":"2026-07-04T14:17:18.201786Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T14:17:18.201786Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/9911154","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":"2026-07-04T14:17:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ytsLmqutb72IfxMT5+6E+UF7q8by42IW+QUxlQVMoGKIJ99YD513jcw+Bd7hWX9T9StHIHF1G/T49jaWo62PAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T17:14:34.918940Z"},"content_sha256":"1a24feb42aec86af420966d938feb4d2bb628461d09e9e274d76c015880fbe5f","schema_version":"1.0","event_id":"sha256:1a24feb42aec86af420966d938feb4d2bb628461d09e9e274d76c015880fbe5f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1999:WQOVHJXY4HGXW2N6S4S2RQAA3O","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Ultra High Energy Cosmic Ray Accelerators","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Angela V. Olinto","submitted_at":"1999-11-09T20:58:48Z","abstract_excerpt":"The surprising lack of a high energy cutoff in the cosmic ray spectrum at the highest energies together with an apparently isotropic distribution of arrival directions have strongly challenged most models proposed for the acceleration of ultra high energy cosmic rays. Young neutron star winds may be able to explain the mystery. We discuss this recent proposal after summarizing the observational challenge and plausible acceleration sites. Young neutrons star winds differ from alternative models in the predictions for composition, spectrum, and angular distribution which will be tested in future"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9911154","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/9911154/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":"2026-07-04T14:17:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FDa2GkEy9mTsQ8QgdfDTohJ1B+kksu5zXdk7pH1VPmObLlUpRltXm7XCUX2Cr1grjPAXvr4kf+A4hNTar+3zBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T17:14:34.920069Z"},"content_sha256":"6704a5322e51e1ba1c7ce64f45b088c56265dc58bd06941676826e55cf5a287e","schema_version":"1.0","event_id":"sha256:6704a5322e51e1ba1c7ce64f45b088c56265dc58bd06941676826e55cf5a287e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WQOVHJXY4HGXW2N6S4S2RQAA3O/bundle.json","state_url":"https://pith.science/pith/WQOVHJXY4HGXW2N6S4S2RQAA3O/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WQOVHJXY4HGXW2N6S4S2RQAA3O/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":"2026-08-15T17:14:34Z","links":{"resolver":"https://pith.science/pith/WQOVHJXY4HGXW2N6S4S2RQAA3O","bundle":"https://pith.science/pith/WQOVHJXY4HGXW2N6S4S2RQAA3O/bundle.json","state":"https://pith.science/pith/WQOVHJXY4HGXW2N6S4S2RQAA3O/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WQOVHJXY4HGXW2N6S4S2RQAA3O/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1999:WQOVHJXY4HGXW2N6S4S2RQAA3O","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":"3089ffe9e1ca433bab38a4d2a0d84cd0c57aa6773ac9d0c21546e2d7e217e297","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1999-11-09T20:58:48Z","title_canon_sha256":"facc8032a9b23fc34bfc07c877ae10c1a42ccd8ff45110f256bc29dc8b6a660b"},"schema_version":"1.0","source":{"id":"astro-ph/9911154","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9911154","created_at":"2026-07-04T14:17:18Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9911154v1","created_at":"2026-07-04T14:17:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9911154","created_at":"2026-07-04T14:17:18Z"},{"alias_kind":"pith_short_12","alias_value":"WQOVHJXY4HGX","created_at":"2026-07-04T14:17:18Z"},{"alias_kind":"pith_short_16","alias_value":"WQOVHJXY4HGXW2N6","created_at":"2026-07-04T14:17:18Z"},{"alias_kind":"pith_short_8","alias_value":"WQOVHJXY","created_at":"2026-07-04T14:17:18Z"}],"graph_snapshots":[{"event_id":"sha256:6704a5322e51e1ba1c7ce64f45b088c56265dc58bd06941676826e55cf5a287e","target":"graph","created_at":"2026-07-04T14:17:18Z","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/9911154/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The surprising lack of a high energy cutoff in the cosmic ray spectrum at the highest energies together with an apparently isotropic distribution of arrival directions have strongly challenged most models proposed for the acceleration of ultra high energy cosmic rays. Young neutron star winds may be able to explain the mystery. We discuss this recent proposal after summarizing the observational challenge and plausible acceleration sites. Young neutrons star winds differ from alternative models in the predictions for composition, spectrum, and angular distribution which will be tested in future","authors_text":"Angela V. Olinto","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1999-11-09T20:58:48Z","title":"Ultra High Energy Cosmic Ray Accelerators"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9911154","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":"sha256:1a24feb42aec86af420966d938feb4d2bb628461d09e9e274d76c015880fbe5f","target":"record","created_at":"2026-07-04T14:17:18Z","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":"3089ffe9e1ca433bab38a4d2a0d84cd0c57aa6773ac9d0c21546e2d7e217e297","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1999-11-09T20:58:48Z","title_canon_sha256":"facc8032a9b23fc34bfc07c877ae10c1a42ccd8ff45110f256bc29dc8b6a660b"},"schema_version":"1.0","source":{"id":"astro-ph/9911154","kind":"arxiv","version":1}},"canonical_sha256":"b41d53a6f8e1cd7b69be9725a8c000dbb50d0b3fbe8ba4d47479607ea9e92731","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b41d53a6f8e1cd7b69be9725a8c000dbb50d0b3fbe8ba4d47479607ea9e92731","first_computed_at":"2026-07-04T14:17:18.201786Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T14:17:18.201786Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mc1pM3WjxBZH/s6M/AKbSKlCMBZUoJOVXTbbDc2oEDxyQ+IjDF+IH5tMz0R128yhgBl1meNcoaIyand8D+MyCw==","signature_status":"signed_v1","signed_at":"2026-07-04T14:17:18.202153Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9911154","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1a24feb42aec86af420966d938feb4d2bb628461d09e9e274d76c015880fbe5f","sha256:6704a5322e51e1ba1c7ce64f45b088c56265dc58bd06941676826e55cf5a287e"],"state_sha256":"62ac0b120d8383f735970b57c692175aadfa24d6e74bd3287ef06b1619069b50"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ehr1u44GOP2rhx+A6L9pIkB17ZNd5wvNSgsLCVdcjtK7ebvw6TjSPfkuEDqaDutrNqUy+gdBqu4EsGG2XyCPAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-15T17:14:34.925700Z","bundle_sha256":"058ad6e0f0f03d676f8e33d46ccd1fe73b28c845d6b8bde8adc403fe7f51ecf9"}}