{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2002:VAGUQAUDJXJ3WPSGUKRIZPX2Y6","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":"c46e86a16eadba7ca4755884c895fc2d75eca57b582845604e005e53b17c7888","cross_cats_sorted":["hep-ph"],"license":"","primary_cat":"astro-ph","submitted_at":"2002-04-30T19:41:46Z","title_canon_sha256":"b733ded496b4b1a99507ab734b5a41406668674b521dbb69515d34e9c452e446"},"schema_version":"1.0","source":{"id":"astro-ph/0204527","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0204527","created_at":"2026-05-18T02:40:35Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0204527v2","created_at":"2026-05-18T02:40:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0204527","created_at":"2026-05-18T02:40:35Z"},{"alias_kind":"pith_short_12","alias_value":"VAGUQAUDJXJ3","created_at":"2026-05-18T12:25:51Z"},{"alias_kind":"pith_short_16","alias_value":"VAGUQAUDJXJ3WPSG","created_at":"2026-05-18T12:25:51Z"},{"alias_kind":"pith_short_8","alias_value":"VAGUQAUD","created_at":"2026-05-18T12:25:51Z"}],"graph_snapshots":[{"event_id":"sha256:ccbcd0689c36992c43d478a511221252c432de2ae71d0ba21824b4fbb8f1ee26","target":"graph","created_at":"2026-05-18T02:40:35Z","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":"This is a review of neutrino astronomy anchored to the observational fact that Nature accelerates protons and photons to energies in excess of $10^{20}$ and $10^{13}$ eV, respectively.\n  Although the discovery of cosmic rays dates back close to a century, we do not know how and where they are accelerated. Basic elementary-particle physics dictates a universal upper limit on their energy of $5\\times10^{19}$ eV, the so-called Greisen-Kuzmin-Zatsepin cutoff; however, particles in excess of this energy have been observed by all experiments, adding one more puzzle to the cosmic ray mystery. Mystery","authors_text":"Dan Hooper, Francis Halzen","cross_cats":["hep-ph"],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2002-04-30T19:41:46Z","title":"High-energy Neutrino Astronomy: The Cosmic Ray Connection"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0204527","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":"sha256:324d4996ddf89e0c60bf699a972e8ddaeedc64c8506a8188c7488181d306983a","target":"record","created_at":"2026-05-18T02:40:35Z","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":"c46e86a16eadba7ca4755884c895fc2d75eca57b582845604e005e53b17c7888","cross_cats_sorted":["hep-ph"],"license":"","primary_cat":"astro-ph","submitted_at":"2002-04-30T19:41:46Z","title_canon_sha256":"b733ded496b4b1a99507ab734b5a41406668674b521dbb69515d34e9c452e446"},"schema_version":"1.0","source":{"id":"astro-ph/0204527","kind":"arxiv","version":2}},"canonical_sha256":"a80d4802834dd3bb3e46a2a28cbefac78d2920a66b83d51467151478bb442cea","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a80d4802834dd3bb3e46a2a28cbefac78d2920a66b83d51467151478bb442cea","first_computed_at":"2026-05-18T02:40:35.592394Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:40:35.592394Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mwVD4QPEO1IPu/SbC5QwJwHF923H1OdAkIhJchZ0yc8Y78rD9z83EVXM3hw78xjS/Yi6Z8rLxNUq19z86y77Ag==","signature_status":"signed_v1","signed_at":"2026-05-18T02:40:35.592987Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0204527","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:324d4996ddf89e0c60bf699a972e8ddaeedc64c8506a8188c7488181d306983a","sha256:ccbcd0689c36992c43d478a511221252c432de2ae71d0ba21824b4fbb8f1ee26"],"state_sha256":"1165bde5406afb251c4b740a414d2f9b8de9eab3e4a208d75b97135604cf74a1"}