{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:WUWQONGHW7ESVFLOS4QMPVUSEG","short_pith_number":"pith:WUWQONGH","canonical_record":{"source":{"id":"2406.17502","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-06-25T12:42:59Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"003bf962b8d99c507378a1f1926b194b95cfb033f58bfea08f19d91733eec3f2","abstract_canon_sha256":"575dd4a82817a5d715d11a47a39ddedd6c0b5609dec0fa97b60ac2874d306309"},"schema_version":"1.0"},"canonical_sha256":"b52d0734c7b7c92a956e9720c7d69221854d5603bf7c7f97c40db1ef05158be3","source":{"kind":"arxiv","id":"2406.17502","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2406.17502","created_at":"2026-07-05T08:36:36Z"},{"alias_kind":"arxiv_version","alias_value":"2406.17502v1","created_at":"2026-07-05T08:36:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2406.17502","created_at":"2026-07-05T08:36:36Z"},{"alias_kind":"pith_short_12","alias_value":"WUWQONGHW7ES","created_at":"2026-07-05T08:36:36Z"},{"alias_kind":"pith_short_16","alias_value":"WUWQONGHW7ESVFLO","created_at":"2026-07-05T08:36:36Z"},{"alias_kind":"pith_short_8","alias_value":"WUWQONGH","created_at":"2026-07-05T08:36:36Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:WUWQONGHW7ESVFLOS4QMPVUSEG","target":"record","payload":{"canonical_record":{"source":{"id":"2406.17502","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-06-25T12:42:59Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"003bf962b8d99c507378a1f1926b194b95cfb033f58bfea08f19d91733eec3f2","abstract_canon_sha256":"575dd4a82817a5d715d11a47a39ddedd6c0b5609dec0fa97b60ac2874d306309"},"schema_version":"1.0"},"canonical_sha256":"b52d0734c7b7c92a956e9720c7d69221854d5603bf7c7f97c40db1ef05158be3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T08:36:36.011865Z","signature_b64":"T/PxGqJb5DDRXE+vJXpKEhhQYPoyrFsFs7fVbAd3PhVLgXy6HZGFXvU23oV9pqZY8iaVo8KGCk4+CU7opmIWAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b52d0734c7b7c92a956e9720c7d69221854d5603bf7c7f97c40db1ef05158be3","last_reissued_at":"2026-07-05T08:36:36.011398Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T08:36:36.011398Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2406.17502","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":"2026-07-05T08:36:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wv89Kf7vZmWLihMwMPyV5L79eF+XcnuGnljJRfIBjguuiukaBECCEiDDF+e45z32Uxl4Dd/9PKjqDyf9vir+CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T10:10:14.590719Z"},"content_sha256":"0f9f2e1683159142d98fa3f76fcf957bfa7d58cc792b13364f39b56a6edf25e8","schema_version":"1.0","event_id":"sha256:0f9f2e1683159142d98fa3f76fcf957bfa7d58cc792b13364f39b56a6edf25e8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:WUWQONGHW7ESVFLOS4QMPVUSEG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Hybrid Approach to Event Reconstruction for Atmospheric Cherenkov Telescopes Combining Machine Learning and Likelihood Fitting","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.HE","authors_text":"Georg Schwefer, Jim Hinton, Robert Parsons","submitted_at":"2024-06-25T12:42:59Z","abstract_excerpt":"The imaging atmospheric Cherenkov technique provides potentially the highest angular resolution achievable in astronomy at energies above the X-ray waveband. High-resolution measurements provide the key to progress on many of the major questions in high-energy astrophysics, including the sites of particle acceleration to PeV energies. The potential of the next-generation CTA observatory in this regard can be realised with the help of improved algorithms for the reconstruction of the air-shower direction and energy. Hybrid methods combining likelihood-fitting techniques with neural networks rep"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2406.17502","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2406.17502/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T08:36:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XoOOAwkZw8yyNtEAnjs1+Fo2UuldytVrbMKcAFenKYzYBadIer3Q2tKTuRoKBX9fMicQJzrzgzlLMPB0J41zAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T10:10:14.591123Z"},"content_sha256":"ffc90c1be95874583abdfbbb254388821a038f338aff0c1bbe6c430b5f4f30b3","schema_version":"1.0","event_id":"sha256:ffc90c1be95874583abdfbbb254388821a038f338aff0c1bbe6c430b5f4f30b3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WUWQONGHW7ESVFLOS4QMPVUSEG/bundle.json","state_url":"https://pith.science/pith/WUWQONGHW7ESVFLOS4QMPVUSEG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WUWQONGHW7ESVFLOS4QMPVUSEG/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":"2026-08-18T10:10:14Z","links":{"resolver":"https://pith.science/pith/WUWQONGHW7ESVFLOS4QMPVUSEG","bundle":"https://pith.science/pith/WUWQONGHW7ESVFLOS4QMPVUSEG/bundle.json","state":"https://pith.science/pith/WUWQONGHW7ESVFLOS4QMPVUSEG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WUWQONGHW7ESVFLOS4QMPVUSEG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:WUWQONGHW7ESVFLOS4QMPVUSEG","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":"575dd4a82817a5d715d11a47a39ddedd6c0b5609dec0fa97b60ac2874d306309","cross_cats_sorted":["astro-ph.IM"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-06-25T12:42:59Z","title_canon_sha256":"003bf962b8d99c507378a1f1926b194b95cfb033f58bfea08f19d91733eec3f2"},"schema_version":"1.0","source":{"id":"2406.17502","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2406.17502","created_at":"2026-07-05T08:36:36Z"},{"alias_kind":"arxiv_version","alias_value":"2406.17502v1","created_at":"2026-07-05T08:36:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2406.17502","created_at":"2026-07-05T08:36:36Z"},{"alias_kind":"pith_short_12","alias_value":"WUWQONGHW7ES","created_at":"2026-07-05T08:36:36Z"},{"alias_kind":"pith_short_16","alias_value":"WUWQONGHW7ESVFLO","created_at":"2026-07-05T08:36:36Z"},{"alias_kind":"pith_short_8","alias_value":"WUWQONGH","created_at":"2026-07-05T08:36:36Z"}],"graph_snapshots":[{"event_id":"sha256:ffc90c1be95874583abdfbbb254388821a038f338aff0c1bbe6c430b5f4f30b3","target":"graph","created_at":"2026-07-05T08:36:36Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2406.17502/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The imaging atmospheric Cherenkov technique provides potentially the highest angular resolution achievable in astronomy at energies above the X-ray waveband. High-resolution measurements provide the key to progress on many of the major questions in high-energy astrophysics, including the sites of particle acceleration to PeV energies. The potential of the next-generation CTA observatory in this regard can be realised with the help of improved algorithms for the reconstruction of the air-shower direction and energy. Hybrid methods combining likelihood-fitting techniques with neural networks rep","authors_text":"Georg Schwefer, Jim Hinton, Robert Parsons","cross_cats":["astro-ph.IM"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-06-25T12:42:59Z","title":"A Hybrid Approach to Event Reconstruction for Atmospheric Cherenkov Telescopes Combining Machine Learning and Likelihood Fitting"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2406.17502","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":"sha256:0f9f2e1683159142d98fa3f76fcf957bfa7d58cc792b13364f39b56a6edf25e8","target":"record","created_at":"2026-07-05T08:36:36Z","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":"575dd4a82817a5d715d11a47a39ddedd6c0b5609dec0fa97b60ac2874d306309","cross_cats_sorted":["astro-ph.IM"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-06-25T12:42:59Z","title_canon_sha256":"003bf962b8d99c507378a1f1926b194b95cfb033f58bfea08f19d91733eec3f2"},"schema_version":"1.0","source":{"id":"2406.17502","kind":"arxiv","version":1}},"canonical_sha256":"b52d0734c7b7c92a956e9720c7d69221854d5603bf7c7f97c40db1ef05158be3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b52d0734c7b7c92a956e9720c7d69221854d5603bf7c7f97c40db1ef05158be3","first_computed_at":"2026-07-05T08:36:36.011398Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T08:36:36.011398Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"T/PxGqJb5DDRXE+vJXpKEhhQYPoyrFsFs7fVbAd3PhVLgXy6HZGFXvU23oV9pqZY8iaVo8KGCk4+CU7opmIWAg==","signature_status":"signed_v1","signed_at":"2026-07-05T08:36:36.011865Z","signed_message":"canonical_sha256_bytes"},"source_id":"2406.17502","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0f9f2e1683159142d98fa3f76fcf957bfa7d58cc792b13364f39b56a6edf25e8","sha256:ffc90c1be95874583abdfbbb254388821a038f338aff0c1bbe6c430b5f4f30b3"],"state_sha256":"99bb098af05e5a7ebc2dbf6f95ca470e8a87f204a427707953446f5038df7073"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0feKjJc9Kl6HEBnGgzj47w454yKWjT7ZfditKvpUlkGN97FmvmRAdwCqjhoS8GE4YJENwJ2RU3s5DPb80ePfCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-18T10:10:14.593465Z","bundle_sha256":"85a5f0d2fa051a1ffdc74b47551b947d6ab899ee8a400394e352eecda38b5e5a"}}