{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2005:XZQCIUDDFP3Y7KUFAJABYGUWPO","short_pith_number":"pith:XZQCIUDD","canonical_record":{"source":{"id":"astro-ph/0512423","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2005-12-15T22:43:01Z","cross_cats_sorted":[],"title_canon_sha256":"39714e68ef74615c64eb8577466513d4f62842fdaf701b40b200b16e3e059058","abstract_canon_sha256":"e6fd6056c96df5559cd131124260400cf2e73e66c596fab1083cb6643df589ff"},"schema_version":"1.0"},"canonical_sha256":"be602450632bf78faa8502401c1a967bbb794280b38e76690d8d4a87974fcc3a","source":{"kind":"arxiv","id":"astro-ph/0512423","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0512423","created_at":"2026-05-18T03:47:43Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0512423v1","created_at":"2026-05-18T03:47:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0512423","created_at":"2026-05-18T03:47:43Z"},{"alias_kind":"pith_short_12","alias_value":"XZQCIUDDFP3Y","created_at":"2026-05-18T12:25:53Z"},{"alias_kind":"pith_short_16","alias_value":"XZQCIUDDFP3Y7KUF","created_at":"2026-05-18T12:25:53Z"},{"alias_kind":"pith_short_8","alias_value":"XZQCIUDD","created_at":"2026-05-18T12:25:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2005:XZQCIUDDFP3Y7KUFAJABYGUWPO","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0512423","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2005-12-15T22:43:01Z","cross_cats_sorted":[],"title_canon_sha256":"39714e68ef74615c64eb8577466513d4f62842fdaf701b40b200b16e3e059058","abstract_canon_sha256":"e6fd6056c96df5559cd131124260400cf2e73e66c596fab1083cb6643df589ff"},"schema_version":"1.0"},"canonical_sha256":"be602450632bf78faa8502401c1a967bbb794280b38e76690d8d4a87974fcc3a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:47:43.290461Z","signature_b64":"Dwx9v69KfhgsFKpU2Zr49odRJ22AgCzI0aCSEBXkk5T4q5q/156YrQuQu7JpasfwtTiNsboIBJfTUHxrVDpLDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"be602450632bf78faa8502401c1a967bbb794280b38e76690d8d4a87974fcc3a","last_reissued_at":"2026-05-18T03:47:43.289992Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:47:43.289992Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0512423","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":"2026-05-18T03:47:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6JnnF0c4g3rfpAjtZt7WTYHni3N+ptZmN3J0fgAwLyS2Eso79pVJfxQXqdIkqvO1BksiDJ2m8a8w3DyAxEbnBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T12:54:46.662577Z"},"content_sha256":"5a102e06386c8f9903b16de25c4a4bf29642be8c77cc210cd535e6badfb918ad","schema_version":"1.0","event_id":"sha256:5a102e06386c8f9903b16de25c4a4bf29642be8c77cc210cd535e6badfb918ad"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2005:XZQCIUDDFP3Y7KUFAJABYGUWPO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Techniques for measuring atmospheric aerosols at the High Resolution Fly's Eye experiment","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"the HiRes Collaboration","submitted_at":"2005-12-15T22:43:01Z","abstract_excerpt":"We describe several techniques developed by the High Resolution Fly's Eye experiment for measuring aerosol vertical optical depth, aerosol horizontal attenuation length, and aerosol phase function. The techniques are based on measurements of side-scattered light generated by a steerable ultraviolet laser and collected by an optical detector designed to measure fluorescence light from cosmic-ray air showers. We also present a technique to cross-check the aerosol optical depth measurement using air showers observed in stereo. These methods can be used by future air fluorescence experiments."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0512423","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":"2026-05-18T03:47:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IGFTxtwXydecSF7Q8vtZDPwDIY2zSw4fT5tazBnQ0TCGrGfVfIfca8bW9dnpYlQwHkKfqyMkXTTjjZNPPs5RBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T12:54:46.663167Z"},"content_sha256":"4cc0637b34772b9519c86d9ff1d78f85f2d76c45203b56d3c6187298c7109336","schema_version":"1.0","event_id":"sha256:4cc0637b34772b9519c86d9ff1d78f85f2d76c45203b56d3c6187298c7109336"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XZQCIUDDFP3Y7KUFAJABYGUWPO/bundle.json","state_url":"https://pith.science/pith/XZQCIUDDFP3Y7KUFAJABYGUWPO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XZQCIUDDFP3Y7KUFAJABYGUWPO/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":"2026-05-31T12:54:46Z","links":{"resolver":"https://pith.science/pith/XZQCIUDDFP3Y7KUFAJABYGUWPO","bundle":"https://pith.science/pith/XZQCIUDDFP3Y7KUFAJABYGUWPO/bundle.json","state":"https://pith.science/pith/XZQCIUDDFP3Y7KUFAJABYGUWPO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XZQCIUDDFP3Y7KUFAJABYGUWPO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2005:XZQCIUDDFP3Y7KUFAJABYGUWPO","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":"e6fd6056c96df5559cd131124260400cf2e73e66c596fab1083cb6643df589ff","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2005-12-15T22:43:01Z","title_canon_sha256":"39714e68ef74615c64eb8577466513d4f62842fdaf701b40b200b16e3e059058"},"schema_version":"1.0","source":{"id":"astro-ph/0512423","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0512423","created_at":"2026-05-18T03:47:43Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0512423v1","created_at":"2026-05-18T03:47:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0512423","created_at":"2026-05-18T03:47:43Z"},{"alias_kind":"pith_short_12","alias_value":"XZQCIUDDFP3Y","created_at":"2026-05-18T12:25:53Z"},{"alias_kind":"pith_short_16","alias_value":"XZQCIUDDFP3Y7KUF","created_at":"2026-05-18T12:25:53Z"},{"alias_kind":"pith_short_8","alias_value":"XZQCIUDD","created_at":"2026-05-18T12:25:53Z"}],"graph_snapshots":[{"event_id":"sha256:4cc0637b34772b9519c86d9ff1d78f85f2d76c45203b56d3c6187298c7109336","target":"graph","created_at":"2026-05-18T03:47:43Z","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":"We describe several techniques developed by the High Resolution Fly's Eye experiment for measuring aerosol vertical optical depth, aerosol horizontal attenuation length, and aerosol phase function. The techniques are based on measurements of side-scattered light generated by a steerable ultraviolet laser and collected by an optical detector designed to measure fluorescence light from cosmic-ray air showers. We also present a technique to cross-check the aerosol optical depth measurement using air showers observed in stereo. These methods can be used by future air fluorescence experiments.","authors_text":"the HiRes Collaboration","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2005-12-15T22:43:01Z","title":"Techniques for measuring atmospheric aerosols at the High Resolution Fly's Eye experiment"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0512423","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":"sha256:5a102e06386c8f9903b16de25c4a4bf29642be8c77cc210cd535e6badfb918ad","target":"record","created_at":"2026-05-18T03:47:43Z","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":"e6fd6056c96df5559cd131124260400cf2e73e66c596fab1083cb6643df589ff","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2005-12-15T22:43:01Z","title_canon_sha256":"39714e68ef74615c64eb8577466513d4f62842fdaf701b40b200b16e3e059058"},"schema_version":"1.0","source":{"id":"astro-ph/0512423","kind":"arxiv","version":1}},"canonical_sha256":"be602450632bf78faa8502401c1a967bbb794280b38e76690d8d4a87974fcc3a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"be602450632bf78faa8502401c1a967bbb794280b38e76690d8d4a87974fcc3a","first_computed_at":"2026-05-18T03:47:43.289992Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:47:43.289992Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Dwx9v69KfhgsFKpU2Zr49odRJ22AgCzI0aCSEBXkk5T4q5q/156YrQuQu7JpasfwtTiNsboIBJfTUHxrVDpLDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:47:43.290461Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0512423","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5a102e06386c8f9903b16de25c4a4bf29642be8c77cc210cd535e6badfb918ad","sha256:4cc0637b34772b9519c86d9ff1d78f85f2d76c45203b56d3c6187298c7109336"],"state_sha256":"4ecacb1ab29eca604e72c1d04a2834bef68904810d78fd8be58f0810d19bf394"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pW8RW08tNDxZnJ4xdkWwJGl2vgmRtlungdR6IlASRE6TIGp4qt5Eqs5nwzn0lZHLNLftU+xMa3L2FU6Tp/aeDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T12:54:46.666606Z","bundle_sha256":"ae41e2192675807c7f0b5b4e4f095b61e3a9d48e3c2a3803f3eaaef8df2e3a27"}}