{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2001:PEVLLDKUVYNNVKS27DXCMMT6LA","short_pith_number":"pith:PEVLLDKU","canonical_record":{"source":{"id":"astro-ph/0107306","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2001-07-17T13:52:37Z","cross_cats_sorted":["hep-ph"],"title_canon_sha256":"e38b3e2c9ed69c6644c0843a2ed4466a1d2ae594ebcdb1ffb9d215f1059e2243","abstract_canon_sha256":"1af3743d3d7e2e997e3fc97b4ad28f2c1a322536844e50a4435623b83961b032"},"schema_version":"1.0"},"canonical_sha256":"792ab58d54ae1adaaa5af8ee26327e5807b68414c54412c3ac506a848bebf502","source":{"kind":"arxiv","id":"astro-ph/0107306","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0107306","created_at":"2026-05-18T02:40:36Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0107306v1","created_at":"2026-05-18T02:40:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0107306","created_at":"2026-05-18T02:40:36Z"},{"alias_kind":"pith_short_12","alias_value":"PEVLLDKUVYNN","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"PEVLLDKUVYNNVKS2","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"PEVLLDKU","created_at":"2026-05-18T12:25:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2001:PEVLLDKUVYNNVKS27DXCMMT6LA","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0107306","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2001-07-17T13:52:37Z","cross_cats_sorted":["hep-ph"],"title_canon_sha256":"e38b3e2c9ed69c6644c0843a2ed4466a1d2ae594ebcdb1ffb9d215f1059e2243","abstract_canon_sha256":"1af3743d3d7e2e997e3fc97b4ad28f2c1a322536844e50a4435623b83961b032"},"schema_version":"1.0"},"canonical_sha256":"792ab58d54ae1adaaa5af8ee26327e5807b68414c54412c3ac506a848bebf502","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:40:36.114980Z","signature_b64":"LsgJF4xJtD3AOrjcmR5NsIHClhZt1OLjJjAp8y+YjOP2RRJAhIBM2uubUrgl/85KX/RBaOdOqaERW/pCVXH3Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"792ab58d54ae1adaaa5af8ee26327e5807b68414c54412c3ac506a848bebf502","last_reissued_at":"2026-05-18T02:40:36.114240Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:40:36.114240Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0107306","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":"2026-05-18T02:40:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bp6nve9Qpw2Ce+e+OICsWJUK+j9SmNi28WFWb7DBH7gpV5asMeksdtlKbV7LXlN3eWvvdKnffuMoQ6rtFlfpBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T04:36:40.457932Z"},"content_sha256":"a13957a2e4c0680ebfc194cdcb64976c1615c812dea3a67b86b70aa051a0549a","schema_version":"1.0","event_id":"sha256:a13957a2e4c0680ebfc194cdcb64976c1615c812dea3a67b86b70aa051a0549a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2001:PEVLLDKUVYNNVKS27DXCMMT6LA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Puzzles in astrophysics in the past and present","license":"","headline":"","cross_cats":["hep-ph"],"primary_cat":"astro-ph","authors_text":"V.Berezinsky","submitted_at":"2001-07-17T13:52:37Z","abstract_excerpt":"About 400 years have passed since the great discoveries by Galilei, Kepler and Newton, but astronomy still remains an important source of discoveries in physics. They start with puzzles, with phenomena difficult to explain, and which in fact need for explanation the new physics. Are such puzzles existing now? There are at least three candidates: absence of absorption of TeV gamma radiation in extragalactic space (violation of Lorentz invariance?), absence of GZK cutoff in the spectrum of Ultra High Energy Cosmic Rays (new particle physics?), tremendous energy (up to $10^{54}$ ergs) released in"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0107306","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":"2026-05-18T02:40:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jqVzg67yNdnBikzb8Xc0DMYmHbKMsLnFUab7ryvvyeslp1Qt3tnUgQ80BUzoJSc9Sp7hfuZlqK9YHc26i6AiDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T04:36:40.458479Z"},"content_sha256":"fdace66fa3995435e4937440aa94e1f9c181fb30a9ab7e21be9f75afb45ffa16","schema_version":"1.0","event_id":"sha256:fdace66fa3995435e4937440aa94e1f9c181fb30a9ab7e21be9f75afb45ffa16"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PEVLLDKUVYNNVKS27DXCMMT6LA/bundle.json","state_url":"https://pith.science/pith/PEVLLDKUVYNNVKS27DXCMMT6LA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PEVLLDKUVYNNVKS27DXCMMT6LA/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":"2026-06-07T04:36:40Z","links":{"resolver":"https://pith.science/pith/PEVLLDKUVYNNVKS27DXCMMT6LA","bundle":"https://pith.science/pith/PEVLLDKUVYNNVKS27DXCMMT6LA/bundle.json","state":"https://pith.science/pith/PEVLLDKUVYNNVKS27DXCMMT6LA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PEVLLDKUVYNNVKS27DXCMMT6LA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2001:PEVLLDKUVYNNVKS27DXCMMT6LA","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":"1af3743d3d7e2e997e3fc97b4ad28f2c1a322536844e50a4435623b83961b032","cross_cats_sorted":["hep-ph"],"license":"","primary_cat":"astro-ph","submitted_at":"2001-07-17T13:52:37Z","title_canon_sha256":"e38b3e2c9ed69c6644c0843a2ed4466a1d2ae594ebcdb1ffb9d215f1059e2243"},"schema_version":"1.0","source":{"id":"astro-ph/0107306","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0107306","created_at":"2026-05-18T02:40:36Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0107306v1","created_at":"2026-05-18T02:40:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0107306","created_at":"2026-05-18T02:40:36Z"},{"alias_kind":"pith_short_12","alias_value":"PEVLLDKUVYNN","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"PEVLLDKUVYNNVKS2","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"PEVLLDKU","created_at":"2026-05-18T12:25:50Z"}],"graph_snapshots":[{"event_id":"sha256:fdace66fa3995435e4937440aa94e1f9c181fb30a9ab7e21be9f75afb45ffa16","target":"graph","created_at":"2026-05-18T02:40:36Z","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":"About 400 years have passed since the great discoveries by Galilei, Kepler and Newton, but astronomy still remains an important source of discoveries in physics. They start with puzzles, with phenomena difficult to explain, and which in fact need for explanation the new physics. Are such puzzles existing now? There are at least three candidates: absence of absorption of TeV gamma radiation in extragalactic space (violation of Lorentz invariance?), absence of GZK cutoff in the spectrum of Ultra High Energy Cosmic Rays (new particle physics?), tremendous energy (up to $10^{54}$ ergs) released in","authors_text":"V.Berezinsky","cross_cats":["hep-ph"],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2001-07-17T13:52:37Z","title":"Puzzles in astrophysics in the past and present"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0107306","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:a13957a2e4c0680ebfc194cdcb64976c1615c812dea3a67b86b70aa051a0549a","target":"record","created_at":"2026-05-18T02:40:36Z","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":"1af3743d3d7e2e997e3fc97b4ad28f2c1a322536844e50a4435623b83961b032","cross_cats_sorted":["hep-ph"],"license":"","primary_cat":"astro-ph","submitted_at":"2001-07-17T13:52:37Z","title_canon_sha256":"e38b3e2c9ed69c6644c0843a2ed4466a1d2ae594ebcdb1ffb9d215f1059e2243"},"schema_version":"1.0","source":{"id":"astro-ph/0107306","kind":"arxiv","version":1}},"canonical_sha256":"792ab58d54ae1adaaa5af8ee26327e5807b68414c54412c3ac506a848bebf502","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"792ab58d54ae1adaaa5af8ee26327e5807b68414c54412c3ac506a848bebf502","first_computed_at":"2026-05-18T02:40:36.114240Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:40:36.114240Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LsgJF4xJtD3AOrjcmR5NsIHClhZt1OLjJjAp8y+YjOP2RRJAhIBM2uubUrgl/85KX/RBaOdOqaERW/pCVXH3Dw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:40:36.114980Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0107306","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a13957a2e4c0680ebfc194cdcb64976c1615c812dea3a67b86b70aa051a0549a","sha256:fdace66fa3995435e4937440aa94e1f9c181fb30a9ab7e21be9f75afb45ffa16"],"state_sha256":"c9e893b044373c752c7903bdebf7f5b59edd411de851aa245d86c33b3a6d1377"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"F4QcGere3RuQKVtNtuDhXJGXZwiaKJlnN1/Ew3l6WsuKHNu4GLzCfoAPZiiOCm3aS+InE/9bUj8sisaB3pMdCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T04:36:40.460990Z","bundle_sha256":"096452b90c80cc8d1f7195bf1f4ec631152371235e7f2f3fd0125d02d596d83f"}}