{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:CZHD7RMKRF56EHGE7EFWWA5NGM","short_pith_number":"pith:CZHD7RMK","canonical_record":{"source":{"id":"1512.02441","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-12-08T12:56:53Z","cross_cats_sorted":[],"title_canon_sha256":"820370c3168177b739763a4c220533e79b72f31af301b64f99d5ab926314586e","abstract_canon_sha256":"09513f568c4c92fd252ff48d4872aea0f493734d3bed4c704b6cb230411fd271"},"schema_version":"1.0"},"canonical_sha256":"164e3fc58a897be21cc4f90b6b03ad33377e7fc92e60b04607e15a24620edd10","source":{"kind":"arxiv","id":"1512.02441","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.02441","created_at":"2026-05-18T01:19:40Z"},{"alias_kind":"arxiv_version","alias_value":"1512.02441v1","created_at":"2026-05-18T01:19:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.02441","created_at":"2026-05-18T01:19:40Z"},{"alias_kind":"pith_short_12","alias_value":"CZHD7RMKRF56","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_16","alias_value":"CZHD7RMKRF56EHGE","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_8","alias_value":"CZHD7RMK","created_at":"2026-05-18T12:29:17Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:CZHD7RMKRF56EHGE7EFWWA5NGM","target":"record","payload":{"canonical_record":{"source":{"id":"1512.02441","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-12-08T12:56:53Z","cross_cats_sorted":[],"title_canon_sha256":"820370c3168177b739763a4c220533e79b72f31af301b64f99d5ab926314586e","abstract_canon_sha256":"09513f568c4c92fd252ff48d4872aea0f493734d3bed4c704b6cb230411fd271"},"schema_version":"1.0"},"canonical_sha256":"164e3fc58a897be21cc4f90b6b03ad33377e7fc92e60b04607e15a24620edd10","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:19:40.430577Z","signature_b64":"3gYlXpQGAbvcWHx6+vxN2+7NRS4icgXsuUpMXbGawoOPxCW0z8BWUHfQOcp90blubUkO9fkSwDb90/Eb5SKLAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"164e3fc58a897be21cc4f90b6b03ad33377e7fc92e60b04607e15a24620edd10","last_reissued_at":"2026-05-18T01:19:40.429918Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:19:40.429918Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1512.02441","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":"2026-05-18T01:19:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fU0Vj7qT8CAmSn+ajWu/g+GfU66HIY7h2yqHyb+9ECfzBG4b8gwl2CyVot2tVEJ3KvCd4ZaQrJ7TKJtEi3mEAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T02:54:53.919527Z"},"content_sha256":"84f94aac6fa1daa01080d2bfdf3a91c3f5a2f5ff72730750e22e3807030df243","schema_version":"1.0","event_id":"sha256:84f94aac6fa1daa01080d2bfdf3a91c3f5a2f5ff72730750e22e3807030df243"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:CZHD7RMKRF56EHGE7EFWWA5NGM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"An elastic lidar system for the H.E.S.S. Experiment","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"G. Vasileiadis, J. Bregeon, M. Compin, M. Sanguillon, S. Rivoire","submitted_at":"2015-12-08T12:56:53Z","abstract_excerpt":"The H.E.S.S. experiment in Namibia, Africa, is a high energy gamma ray tele- scope sensitive in the energy range from 100 Gev to a few tens of TeV, via the use of the atmospheric Cherenkov technique. To minimize the systematic errors on the derived fluxes of the measured sources, one has to calculate the impact of the atmospheric properties, in particular the extinction parameter of the Cherenkov light ( 300-650 nm) exploited to observe and reconstruct atmospheric particle showers initiated by gamma-ray photons. A lidar can provide this kind of information for some given wavelengths within thi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.02441","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":"2026-05-18T01:19:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KtS/mda72NTOld/9RttKbVdZCuvtDW7iiQkCv6pa64o7/dDA5W7uaml0wbXjuMgHpjErUFpnpc+fAz6xFjrIAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T02:54:53.919866Z"},"content_sha256":"767787274576f0b180ac7cb84365f8cee06ed3fa84a1665a8f073520d4820aea","schema_version":"1.0","event_id":"sha256:767787274576f0b180ac7cb84365f8cee06ed3fa84a1665a8f073520d4820aea"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CZHD7RMKRF56EHGE7EFWWA5NGM/bundle.json","state_url":"https://pith.science/pith/CZHD7RMKRF56EHGE7EFWWA5NGM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CZHD7RMKRF56EHGE7EFWWA5NGM/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":"2026-06-04T02:54:53Z","links":{"resolver":"https://pith.science/pith/CZHD7RMKRF56EHGE7EFWWA5NGM","bundle":"https://pith.science/pith/CZHD7RMKRF56EHGE7EFWWA5NGM/bundle.json","state":"https://pith.science/pith/CZHD7RMKRF56EHGE7EFWWA5NGM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CZHD7RMKRF56EHGE7EFWWA5NGM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:CZHD7RMKRF56EHGE7EFWWA5NGM","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":"09513f568c4c92fd252ff48d4872aea0f493734d3bed4c704b6cb230411fd271","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-12-08T12:56:53Z","title_canon_sha256":"820370c3168177b739763a4c220533e79b72f31af301b64f99d5ab926314586e"},"schema_version":"1.0","source":{"id":"1512.02441","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.02441","created_at":"2026-05-18T01:19:40Z"},{"alias_kind":"arxiv_version","alias_value":"1512.02441v1","created_at":"2026-05-18T01:19:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.02441","created_at":"2026-05-18T01:19:40Z"},{"alias_kind":"pith_short_12","alias_value":"CZHD7RMKRF56","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_16","alias_value":"CZHD7RMKRF56EHGE","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_8","alias_value":"CZHD7RMK","created_at":"2026-05-18T12:29:17Z"}],"graph_snapshots":[{"event_id":"sha256:767787274576f0b180ac7cb84365f8cee06ed3fa84a1665a8f073520d4820aea","target":"graph","created_at":"2026-05-18T01:19:40Z","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":"The H.E.S.S. experiment in Namibia, Africa, is a high energy gamma ray tele- scope sensitive in the energy range from 100 Gev to a few tens of TeV, via the use of the atmospheric Cherenkov technique. To minimize the systematic errors on the derived fluxes of the measured sources, one has to calculate the impact of the atmospheric properties, in particular the extinction parameter of the Cherenkov light ( 300-650 nm) exploited to observe and reconstruct atmospheric particle showers initiated by gamma-ray photons. A lidar can provide this kind of information for some given wavelengths within thi","authors_text":"G. Vasileiadis, J. Bregeon, M. Compin, M. Sanguillon, S. Rivoire","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-12-08T12:56:53Z","title":"An elastic lidar system for the H.E.S.S. Experiment"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.02441","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":"sha256:84f94aac6fa1daa01080d2bfdf3a91c3f5a2f5ff72730750e22e3807030df243","target":"record","created_at":"2026-05-18T01:19:40Z","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":"09513f568c4c92fd252ff48d4872aea0f493734d3bed4c704b6cb230411fd271","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-12-08T12:56:53Z","title_canon_sha256":"820370c3168177b739763a4c220533e79b72f31af301b64f99d5ab926314586e"},"schema_version":"1.0","source":{"id":"1512.02441","kind":"arxiv","version":1}},"canonical_sha256":"164e3fc58a897be21cc4f90b6b03ad33377e7fc92e60b04607e15a24620edd10","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"164e3fc58a897be21cc4f90b6b03ad33377e7fc92e60b04607e15a24620edd10","first_computed_at":"2026-05-18T01:19:40.429918Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:19:40.429918Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3gYlXpQGAbvcWHx6+vxN2+7NRS4icgXsuUpMXbGawoOPxCW0z8BWUHfQOcp90blubUkO9fkSwDb90/Eb5SKLAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:19:40.430577Z","signed_message":"canonical_sha256_bytes"},"source_id":"1512.02441","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:84f94aac6fa1daa01080d2bfdf3a91c3f5a2f5ff72730750e22e3807030df243","sha256:767787274576f0b180ac7cb84365f8cee06ed3fa84a1665a8f073520d4820aea"],"state_sha256":"07f0263c444937906acf45493872f46dbddb421e2f061df8d4e0340d95ba6d02"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aVQrh2tqjMu9bPbvGCrem4v7Zw+hPO7YfJ+kjWJWminyax1RR3qZfGXT3v+6awxVepOQua0qLAkBWAf35I3uAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T02:54:53.921795Z","bundle_sha256":"d2b0837cbc827d6c4aa7e7c141520209e8bc522c111a31d762be6c3f19ad7289"}}