{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2005:JR7SB2DYFDQ5JKD5IEQUOOERQV","short_pith_number":"pith:JR7SB2DY","canonical_record":{"source":{"id":"astro-ph/0512434","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2005-12-16T10:56:18Z","cross_cats_sorted":["hep-ph"],"title_canon_sha256":"01a9d031562265dc8d45212985004fa60a52df2e3a0276ed2950aec92fce8130","abstract_canon_sha256":"4d98c42f4a2f2de86b911ca3d16110b9cdc9e1b0b7e49846d884cb7dc73db554"},"schema_version":"1.0"},"canonical_sha256":"4c7f20e87828e1d4a87d4121473891857232adbc66821046f870d82328307c1a","source":{"kind":"arxiv","id":"astro-ph/0512434","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0512434","created_at":"2026-05-18T01:40:32Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0512434v1","created_at":"2026-05-18T01:40:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0512434","created_at":"2026-05-18T01:40:32Z"},{"alias_kind":"pith_short_12","alias_value":"JR7SB2DYFDQ5","created_at":"2026-05-18T12:25:53Z"},{"alias_kind":"pith_short_16","alias_value":"JR7SB2DYFDQ5JKD5","created_at":"2026-05-18T12:25:53Z"},{"alias_kind":"pith_short_8","alias_value":"JR7SB2DY","created_at":"2026-05-18T12:25:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2005:JR7SB2DYFDQ5JKD5IEQUOOERQV","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0512434","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2005-12-16T10:56:18Z","cross_cats_sorted":["hep-ph"],"title_canon_sha256":"01a9d031562265dc8d45212985004fa60a52df2e3a0276ed2950aec92fce8130","abstract_canon_sha256":"4d98c42f4a2f2de86b911ca3d16110b9cdc9e1b0b7e49846d884cb7dc73db554"},"schema_version":"1.0"},"canonical_sha256":"4c7f20e87828e1d4a87d4121473891857232adbc66821046f870d82328307c1a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:40:32.893963Z","signature_b64":"jG9RydCAbotgmvW090PZTYSWfgfJYQ64qe3aFJeapZo0P4p4k9y4bA2QXvys1ADchMM4hfWZad/LXzADOIgVCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4c7f20e87828e1d4a87d4121473891857232adbc66821046f870d82328307c1a","last_reissued_at":"2026-05-18T01:40:32.893374Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:40:32.893374Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0512434","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":"2026-05-18T01:40:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aLIDo7TFvs4Mj+JGDwmSFr3tbx5lP17WwgOh4ZOPkpQEMTTNG+eQeZuHFdqFTWMCT+z338dSaAqB5Qs0flhNAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T17:00:09.197046Z"},"content_sha256":"e7b8432e629cd731e6c1f197bbd4bfc9e201e904f2b4959b1ac63cbebb9211e5","schema_version":"1.0","event_id":"sha256:e7b8432e629cd731e6c1f197bbd4bfc9e201e904f2b4959b1ac63cbebb9211e5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2005:JR7SB2DYFDQ5JKD5IEQUOOERQV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Photon air showers at ultra-high energy and the photonuclear cross-section","license":"","headline":"","cross_cats":["hep-ph"],"primary_cat":"astro-ph","authors_text":"B. Wilczynska, D. Gora, D. Heck, H. Wilczynski, J.Pekala, M. Risse, P. Homola, R. Engel","submitted_at":"2005-12-16T10:56:18Z","abstract_excerpt":"Experimental conclusions from air shower observations on cosmic-ray photons above 10^19 eV are based on the comparison to detailed shower simulations. For the calculations, the photonuclear cross-section needs to be extrapolated over several orders of magnitude in energy. The uncertainty from the cross-section extrapolation translates into an uncertainty of the predicted shower features for primary photons and, thus, into uncertainties for a possible data interpretation. After briefly reviewing the current status of ultra-high energy photon studies, the impact of the uncertainty of the photonu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0512434","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":"2026-05-18T01:40:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"L34giDZfDQ/CJ+3MQvWCrg+VoOwI5FDrAL5NrgfNuYEtc0OagAs8kLVAiMbn4VC4zQ7CsPBTYYt+ivIlC0ArDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T17:00:09.197645Z"},"content_sha256":"b975132a339187db2503cc0fcc23996c26e4b9ee84c878f53ed97376be3c4d80","schema_version":"1.0","event_id":"sha256:b975132a339187db2503cc0fcc23996c26e4b9ee84c878f53ed97376be3c4d80"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JR7SB2DYFDQ5JKD5IEQUOOERQV/bundle.json","state_url":"https://pith.science/pith/JR7SB2DYFDQ5JKD5IEQUOOERQV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JR7SB2DYFDQ5JKD5IEQUOOERQV/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":"2026-06-11T17:00:09Z","links":{"resolver":"https://pith.science/pith/JR7SB2DYFDQ5JKD5IEQUOOERQV","bundle":"https://pith.science/pith/JR7SB2DYFDQ5JKD5IEQUOOERQV/bundle.json","state":"https://pith.science/pith/JR7SB2DYFDQ5JKD5IEQUOOERQV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JR7SB2DYFDQ5JKD5IEQUOOERQV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2005:JR7SB2DYFDQ5JKD5IEQUOOERQV","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":"4d98c42f4a2f2de86b911ca3d16110b9cdc9e1b0b7e49846d884cb7dc73db554","cross_cats_sorted":["hep-ph"],"license":"","primary_cat":"astro-ph","submitted_at":"2005-12-16T10:56:18Z","title_canon_sha256":"01a9d031562265dc8d45212985004fa60a52df2e3a0276ed2950aec92fce8130"},"schema_version":"1.0","source":{"id":"astro-ph/0512434","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0512434","created_at":"2026-05-18T01:40:32Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0512434v1","created_at":"2026-05-18T01:40:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0512434","created_at":"2026-05-18T01:40:32Z"},{"alias_kind":"pith_short_12","alias_value":"JR7SB2DYFDQ5","created_at":"2026-05-18T12:25:53Z"},{"alias_kind":"pith_short_16","alias_value":"JR7SB2DYFDQ5JKD5","created_at":"2026-05-18T12:25:53Z"},{"alias_kind":"pith_short_8","alias_value":"JR7SB2DY","created_at":"2026-05-18T12:25:53Z"}],"graph_snapshots":[{"event_id":"sha256:b975132a339187db2503cc0fcc23996c26e4b9ee84c878f53ed97376be3c4d80","target":"graph","created_at":"2026-05-18T01:40:32Z","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":"Experimental conclusions from air shower observations on cosmic-ray photons above 10^19 eV are based on the comparison to detailed shower simulations. For the calculations, the photonuclear cross-section needs to be extrapolated over several orders of magnitude in energy. The uncertainty from the cross-section extrapolation translates into an uncertainty of the predicted shower features for primary photons and, thus, into uncertainties for a possible data interpretation. After briefly reviewing the current status of ultra-high energy photon studies, the impact of the uncertainty of the photonu","authors_text":"B. Wilczynska, D. Gora, D. Heck, H. Wilczynski, J.Pekala, M. Risse, P. Homola, R. Engel","cross_cats":["hep-ph"],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2005-12-16T10:56:18Z","title":"Photon air showers at ultra-high energy and the photonuclear cross-section"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0512434","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:e7b8432e629cd731e6c1f197bbd4bfc9e201e904f2b4959b1ac63cbebb9211e5","target":"record","created_at":"2026-05-18T01:40:32Z","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":"4d98c42f4a2f2de86b911ca3d16110b9cdc9e1b0b7e49846d884cb7dc73db554","cross_cats_sorted":["hep-ph"],"license":"","primary_cat":"astro-ph","submitted_at":"2005-12-16T10:56:18Z","title_canon_sha256":"01a9d031562265dc8d45212985004fa60a52df2e3a0276ed2950aec92fce8130"},"schema_version":"1.0","source":{"id":"astro-ph/0512434","kind":"arxiv","version":1}},"canonical_sha256":"4c7f20e87828e1d4a87d4121473891857232adbc66821046f870d82328307c1a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4c7f20e87828e1d4a87d4121473891857232adbc66821046f870d82328307c1a","first_computed_at":"2026-05-18T01:40:32.893374Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:40:32.893374Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jG9RydCAbotgmvW090PZTYSWfgfJYQ64qe3aFJeapZo0P4p4k9y4bA2QXvys1ADchMM4hfWZad/LXzADOIgVCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:40:32.893963Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0512434","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e7b8432e629cd731e6c1f197bbd4bfc9e201e904f2b4959b1ac63cbebb9211e5","sha256:b975132a339187db2503cc0fcc23996c26e4b9ee84c878f53ed97376be3c4d80"],"state_sha256":"02916f004045185e34369f9cb89c40bf36fea5993512d39ec1660e6f183e968a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ar5urEyrsOvmtgiEKUSLOND7lYtCpxl4qyhK8fWBRNT1pQ5HRYBFmcxUVFaidoRQhCD4AFiX8KxG0dbUqbhAAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-11T17:00:09.201097Z","bundle_sha256":"ac68916c663f87fb240814a2fa76cadb044efc9e1716416fbc51ea496de519e2"}}