{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:CGGDFJZ4YU7SZJNU2NJRINNQ3F","short_pith_number":"pith:CGGDFJZ4","canonical_record":{"source":{"id":"1907.04566","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-07-10T08:25:02Z","cross_cats_sorted":[],"title_canon_sha256":"cc760165820220fa84b12be7d0565e7ff1c5e09f33039533fdaf702361570692","abstract_canon_sha256":"7d4fe3ed5df65eb352e7e0edbf433fb60695ab01d3984780570d4342747a7001"},"schema_version":"1.0"},"canonical_sha256":"118c32a73cc53f2ca5b4d3531435b0d96616e8ada572a85c965ef077e2d6ecc1","source":{"kind":"arxiv","id":"1907.04566","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.04566","created_at":"2026-05-17T23:40:03Z"},{"alias_kind":"arxiv_version","alias_value":"1907.04566v1","created_at":"2026-05-17T23:40:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.04566","created_at":"2026-05-17T23:40:03Z"},{"alias_kind":"pith_short_12","alias_value":"CGGDFJZ4YU7S","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_16","alias_value":"CGGDFJZ4YU7SZJNU","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_8","alias_value":"CGGDFJZ4","created_at":"2026-05-18T12:33:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:CGGDFJZ4YU7SZJNU2NJRINNQ3F","target":"record","payload":{"canonical_record":{"source":{"id":"1907.04566","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-07-10T08:25:02Z","cross_cats_sorted":[],"title_canon_sha256":"cc760165820220fa84b12be7d0565e7ff1c5e09f33039533fdaf702361570692","abstract_canon_sha256":"7d4fe3ed5df65eb352e7e0edbf433fb60695ab01d3984780570d4342747a7001"},"schema_version":"1.0"},"canonical_sha256":"118c32a73cc53f2ca5b4d3531435b0d96616e8ada572a85c965ef077e2d6ecc1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:40:03.173129Z","signature_b64":"H5nqhIG68uz75HQuV12gTgtflSSQWpnFjmZMrl6TFtGJ5jCwDspOEb2M1D+xlZYUYJOzZPCEvc1q/x4WNPA5BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"118c32a73cc53f2ca5b4d3531435b0d96616e8ada572a85c965ef077e2d6ecc1","last_reissued_at":"2026-05-17T23:40:03.172418Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:40:03.172418Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1907.04566","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":"2026-05-17T23:40:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dyvmwA6OFm6E3pA9JKMSA9eIKeXXyfJdW6Q3wNJ6nVIHpzYA9wv4a37bYFDbuRD/PRhwufeO8qrrS1SfxBsGBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T20:20:27.224766Z"},"content_sha256":"31f61335ba1c117e10e78d843d59d2e0ceb740e156edbd7e7249b1e529c790da","schema_version":"1.0","event_id":"sha256:31f61335ba1c117e10e78d843d59d2e0ceb740e156edbd7e7249b1e529c790da"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:CGGDFJZ4YU7SZJNU2NJRINNQ3F","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Prospects for the Use of Photosensor Timing Information with Machine Learning Techniques in Background Rejection","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Garret Cotter, Jason Watson, Samuel Spencer, Thomas Armstrong","submitted_at":"2019-07-10T08:25:02Z","abstract_excerpt":"Recent developments in machine learning (ML) techniques present a promising new analysis method for high-speed imaging in astroparticle physics experiments, for example with imaging atmospheric Cherenkov telescopes (IACTs). In particular, the use of timing information with new machine learning techniques provides a novel method for event classification. Previous work in this field has utilised images of the integrated charge from IACT camera photomultipliers, but the majority of current and upcoming IACT cameras have the capacity to read out the entire photosensor waveform following a trigger."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.04566","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":"2026-05-17T23:40:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7C4tn5/w4fVHr6LTlrkt6kEo7LSuHa4Jg3syOZKnA5FnTKTEgUGdZKYP+1jyOL/xChA1U0hH3pvjc/7gV2/uBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T20:20:27.225192Z"},"content_sha256":"41d4df7ff7b64298cccadafa63a525b7f3b027d660d68eb3b745c031fbdf4f46","schema_version":"1.0","event_id":"sha256:41d4df7ff7b64298cccadafa63a525b7f3b027d660d68eb3b745c031fbdf4f46"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CGGDFJZ4YU7SZJNU2NJRINNQ3F/bundle.json","state_url":"https://pith.science/pith/CGGDFJZ4YU7SZJNU2NJRINNQ3F/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CGGDFJZ4YU7SZJNU2NJRINNQ3F/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":"2026-05-25T20:20:27Z","links":{"resolver":"https://pith.science/pith/CGGDFJZ4YU7SZJNU2NJRINNQ3F","bundle":"https://pith.science/pith/CGGDFJZ4YU7SZJNU2NJRINNQ3F/bundle.json","state":"https://pith.science/pith/CGGDFJZ4YU7SZJNU2NJRINNQ3F/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CGGDFJZ4YU7SZJNU2NJRINNQ3F/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:CGGDFJZ4YU7SZJNU2NJRINNQ3F","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":"7d4fe3ed5df65eb352e7e0edbf433fb60695ab01d3984780570d4342747a7001","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-07-10T08:25:02Z","title_canon_sha256":"cc760165820220fa84b12be7d0565e7ff1c5e09f33039533fdaf702361570692"},"schema_version":"1.0","source":{"id":"1907.04566","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.04566","created_at":"2026-05-17T23:40:03Z"},{"alias_kind":"arxiv_version","alias_value":"1907.04566v1","created_at":"2026-05-17T23:40:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.04566","created_at":"2026-05-17T23:40:03Z"},{"alias_kind":"pith_short_12","alias_value":"CGGDFJZ4YU7S","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_16","alias_value":"CGGDFJZ4YU7SZJNU","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_8","alias_value":"CGGDFJZ4","created_at":"2026-05-18T12:33:12Z"}],"graph_snapshots":[{"event_id":"sha256:41d4df7ff7b64298cccadafa63a525b7f3b027d660d68eb3b745c031fbdf4f46","target":"graph","created_at":"2026-05-17T23:40:03Z","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":"Recent developments in machine learning (ML) techniques present a promising new analysis method for high-speed imaging in astroparticle physics experiments, for example with imaging atmospheric Cherenkov telescopes (IACTs). In particular, the use of timing information with new machine learning techniques provides a novel method for event classification. Previous work in this field has utilised images of the integrated charge from IACT camera photomultipliers, but the majority of current and upcoming IACT cameras have the capacity to read out the entire photosensor waveform following a trigger.","authors_text":"Garret Cotter, Jason Watson, Samuel Spencer, Thomas Armstrong","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-07-10T08:25:02Z","title":"Prospects for the Use of Photosensor Timing Information with Machine Learning Techniques in Background Rejection"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.04566","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":"sha256:31f61335ba1c117e10e78d843d59d2e0ceb740e156edbd7e7249b1e529c790da","target":"record","created_at":"2026-05-17T23:40:03Z","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":"7d4fe3ed5df65eb352e7e0edbf433fb60695ab01d3984780570d4342747a7001","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-07-10T08:25:02Z","title_canon_sha256":"cc760165820220fa84b12be7d0565e7ff1c5e09f33039533fdaf702361570692"},"schema_version":"1.0","source":{"id":"1907.04566","kind":"arxiv","version":1}},"canonical_sha256":"118c32a73cc53f2ca5b4d3531435b0d96616e8ada572a85c965ef077e2d6ecc1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"118c32a73cc53f2ca5b4d3531435b0d96616e8ada572a85c965ef077e2d6ecc1","first_computed_at":"2026-05-17T23:40:03.172418Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:40:03.172418Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"H5nqhIG68uz75HQuV12gTgtflSSQWpnFjmZMrl6TFtGJ5jCwDspOEb2M1D+xlZYUYJOzZPCEvc1q/x4WNPA5BA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:40:03.173129Z","signed_message":"canonical_sha256_bytes"},"source_id":"1907.04566","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:31f61335ba1c117e10e78d843d59d2e0ceb740e156edbd7e7249b1e529c790da","sha256:41d4df7ff7b64298cccadafa63a525b7f3b027d660d68eb3b745c031fbdf4f46"],"state_sha256":"4cee62a62365abe74f747ee0d7f990acdf621632a65e3d4a9c2e74618240c6e3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wKHbhtt0Y8DhD1oMUwo4R6YVJ7zRFPK0ItGgy+MrSSFVfRJSGwV0Gq7/t0ZzRyikPxVycnyMBH0sdz5/wNLgCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T20:20:27.227949Z","bundle_sha256":"d717d19f110aaf7dca984c65dd7188dcbaf57c68440b91c0612d04075d9c5833"}}