{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:ZK3B3YSCCW2XXG2ARM3ZTCUM4A","short_pith_number":"pith:ZK3B3YSC","canonical_record":{"source":{"id":"1310.2058","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-10-08T09:30:00Z","cross_cats_sorted":["hep-ph"],"title_canon_sha256":"6d49a863030cbdbec9ff1a110e8bbc083c1077734130622cd2e19be45546173e","abstract_canon_sha256":"0683504603ac0209f2404bf1240c768e8e36c267e0f8760c95128092630fc4b8"},"schema_version":"1.0"},"canonical_sha256":"cab61de24215b57b9b408b37998a8ce02db28cdd596f4408c8c4d4869e9e8591","source":{"kind":"arxiv","id":"1310.2058","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1310.2058","created_at":"2026-05-18T02:41:01Z"},{"alias_kind":"arxiv_version","alias_value":"1310.2058v1","created_at":"2026-05-18T02:41:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1310.2058","created_at":"2026-05-18T02:41:01Z"},{"alias_kind":"pith_short_12","alias_value":"ZK3B3YSCCW2X","created_at":"2026-05-18T12:28:09Z"},{"alias_kind":"pith_short_16","alias_value":"ZK3B3YSCCW2XXG2A","created_at":"2026-05-18T12:28:09Z"},{"alias_kind":"pith_short_8","alias_value":"ZK3B3YSC","created_at":"2026-05-18T12:28:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:ZK3B3YSCCW2XXG2ARM3ZTCUM4A","target":"record","payload":{"canonical_record":{"source":{"id":"1310.2058","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-10-08T09:30:00Z","cross_cats_sorted":["hep-ph"],"title_canon_sha256":"6d49a863030cbdbec9ff1a110e8bbc083c1077734130622cd2e19be45546173e","abstract_canon_sha256":"0683504603ac0209f2404bf1240c768e8e36c267e0f8760c95128092630fc4b8"},"schema_version":"1.0"},"canonical_sha256":"cab61de24215b57b9b408b37998a8ce02db28cdd596f4408c8c4d4869e9e8591","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:41:01.762519Z","signature_b64":"CGFscFOBwQNorAMRETq/iXBNXbRqAPT4R4IVzIBhQ8WT2RyKId0AuXjCQvkRp9sixfSGeYCeeF6EQ6MA6ZOgBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cab61de24215b57b9b408b37998a8ce02db28cdd596f4408c8c4d4869e9e8591","last_reissued_at":"2026-05-18T02:41:01.762055Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:41:01.762055Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1310.2058","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":"2026-05-18T02:41:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JqhUt3F5yikZPZitYeSah0lM+KDMYF19/7byS1iqjDPwg1RAAYEEHe7fgdwxCe1YWGZEvDBkHzdsqeOJqn8tCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T02:01:00.800971Z"},"content_sha256":"47d2c72bae45da60111c92f426287180533dbc3718f0cc3c14effa832fff3195","schema_version":"1.0","event_id":"sha256:47d2c72bae45da60111c92f426287180533dbc3718f0cc3c14effa832fff3195"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:ZK3B3YSCCW2XXG2ARM3ZTCUM4A","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Impact of oscillations of photons into axion-like particles on the very-high energy gamma-ray spectrum of the blazar PKS1424+240","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ph"],"primary_cat":"astro-ph.HE","authors_text":"Dieter Horns, Manuel Meyer","submitted_at":"2013-10-08T09:30:00Z","abstract_excerpt":"Very high energy (VHE) gamma-rays undergo pair production with low energy photons of background radiation fields. This leads to an attenuation of the primary gamma-ray flux of extragalactic sources in the interaction with the extragalactic background light (EBL) which stretches from ultraviolet to far-infrared wavelengths.\n  In the presence of magnetic fields, gamma-rays could oscillate into hypothetical axion-like particles (ALPs). This might lead to a reduced opacity of the Universe for VHE gamma-rays, as ALPs circumvent pair production. Here, the impact of photon-ALP conversions on the spec"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1310.2058","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":"2026-05-18T02:41:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kRHC1IwksSyjc6cKy3JT9/ZU5XEr11AePT+kzpcla9N+hcR9YviJGEKBQwu2kvgA+lTajy8Vs/rtR5r5lZSUCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T02:01:00.801352Z"},"content_sha256":"56ff556d8eb5440fd40ac33e6a617ef0bd33b97b4b8ee2c3f86112ee03875055","schema_version":"1.0","event_id":"sha256:56ff556d8eb5440fd40ac33e6a617ef0bd33b97b4b8ee2c3f86112ee03875055"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZK3B3YSCCW2XXG2ARM3ZTCUM4A/bundle.json","state_url":"https://pith.science/pith/ZK3B3YSCCW2XXG2ARM3ZTCUM4A/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZK3B3YSCCW2XXG2ARM3ZTCUM4A/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":"2026-05-28T02:01:00Z","links":{"resolver":"https://pith.science/pith/ZK3B3YSCCW2XXG2ARM3ZTCUM4A","bundle":"https://pith.science/pith/ZK3B3YSCCW2XXG2ARM3ZTCUM4A/bundle.json","state":"https://pith.science/pith/ZK3B3YSCCW2XXG2ARM3ZTCUM4A/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZK3B3YSCCW2XXG2ARM3ZTCUM4A/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:ZK3B3YSCCW2XXG2ARM3ZTCUM4A","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":"0683504603ac0209f2404bf1240c768e8e36c267e0f8760c95128092630fc4b8","cross_cats_sorted":["hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-10-08T09:30:00Z","title_canon_sha256":"6d49a863030cbdbec9ff1a110e8bbc083c1077734130622cd2e19be45546173e"},"schema_version":"1.0","source":{"id":"1310.2058","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1310.2058","created_at":"2026-05-18T02:41:01Z"},{"alias_kind":"arxiv_version","alias_value":"1310.2058v1","created_at":"2026-05-18T02:41:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1310.2058","created_at":"2026-05-18T02:41:01Z"},{"alias_kind":"pith_short_12","alias_value":"ZK3B3YSCCW2X","created_at":"2026-05-18T12:28:09Z"},{"alias_kind":"pith_short_16","alias_value":"ZK3B3YSCCW2XXG2A","created_at":"2026-05-18T12:28:09Z"},{"alias_kind":"pith_short_8","alias_value":"ZK3B3YSC","created_at":"2026-05-18T12:28:09Z"}],"graph_snapshots":[{"event_id":"sha256:56ff556d8eb5440fd40ac33e6a617ef0bd33b97b4b8ee2c3f86112ee03875055","target":"graph","created_at":"2026-05-18T02:41:01Z","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":"Very high energy (VHE) gamma-rays undergo pair production with low energy photons of background radiation fields. This leads to an attenuation of the primary gamma-ray flux of extragalactic sources in the interaction with the extragalactic background light (EBL) which stretches from ultraviolet to far-infrared wavelengths.\n  In the presence of magnetic fields, gamma-rays could oscillate into hypothetical axion-like particles (ALPs). This might lead to a reduced opacity of the Universe for VHE gamma-rays, as ALPs circumvent pair production. Here, the impact of photon-ALP conversions on the spec","authors_text":"Dieter Horns, Manuel Meyer","cross_cats":["hep-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-10-08T09:30:00Z","title":"Impact of oscillations of photons into axion-like particles on the very-high energy gamma-ray spectrum of the blazar PKS1424+240"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1310.2058","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":"sha256:47d2c72bae45da60111c92f426287180533dbc3718f0cc3c14effa832fff3195","target":"record","created_at":"2026-05-18T02:41:01Z","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":"0683504603ac0209f2404bf1240c768e8e36c267e0f8760c95128092630fc4b8","cross_cats_sorted":["hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-10-08T09:30:00Z","title_canon_sha256":"6d49a863030cbdbec9ff1a110e8bbc083c1077734130622cd2e19be45546173e"},"schema_version":"1.0","source":{"id":"1310.2058","kind":"arxiv","version":1}},"canonical_sha256":"cab61de24215b57b9b408b37998a8ce02db28cdd596f4408c8c4d4869e9e8591","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cab61de24215b57b9b408b37998a8ce02db28cdd596f4408c8c4d4869e9e8591","first_computed_at":"2026-05-18T02:41:01.762055Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:41:01.762055Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"CGFscFOBwQNorAMRETq/iXBNXbRqAPT4R4IVzIBhQ8WT2RyKId0AuXjCQvkRp9sixfSGeYCeeF6EQ6MA6ZOgBw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:41:01.762519Z","signed_message":"canonical_sha256_bytes"},"source_id":"1310.2058","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:47d2c72bae45da60111c92f426287180533dbc3718f0cc3c14effa832fff3195","sha256:56ff556d8eb5440fd40ac33e6a617ef0bd33b97b4b8ee2c3f86112ee03875055"],"state_sha256":"f4baefa91e6bfa7f536f59b19e05764138a609c4ac63f15daeb6e015499e892b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1RhOuRzZzbjSgce6Q9ICha3yvBwOUbKn1S/sqDvPzU9fyWydeML3Bwml3Pv0txDW56lvyUuPflwcH/tiVkd8Bw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T02:01:00.803705Z","bundle_sha256":"45d8641f08d4a1fc9a66ddb229c0aa346d14a6a677179234d9d0e1c17c032b64"}}