{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:M2YFGHTG7DBMGKGW67SBZJKRJS","short_pith_number":"pith:M2YFGHTG","canonical_record":{"source":{"id":"1907.03023","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2019-07-03T10:50:23Z","cross_cats_sorted":["hep-ex"],"title_canon_sha256":"c0d17232993076ac6836d7a71e2ac2f30811caf157507fe8af2bc5c184e68000","abstract_canon_sha256":"c8363da6765c313eb5d67b50696e6f4d26bd126e7c1932eaddd6ae9bde9cac30"},"schema_version":"1.0"},"canonical_sha256":"66b0531e66f8c2c328d6f7e41ca5514c917100bd15b7a23fa696e70f971cf253","source":{"kind":"arxiv","id":"1907.03023","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.03023","created_at":"2026-05-17T23:41:19Z"},{"alias_kind":"arxiv_version","alias_value":"1907.03023v1","created_at":"2026-05-17T23:41:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.03023","created_at":"2026-05-17T23:41:19Z"},{"alias_kind":"pith_short_12","alias_value":"M2YFGHTG7DBM","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"M2YFGHTG7DBMGKGW","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"M2YFGHTG","created_at":"2026-05-18T12:33:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:M2YFGHTG7DBMGKGW67SBZJKRJS","target":"record","payload":{"canonical_record":{"source":{"id":"1907.03023","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2019-07-03T10:50:23Z","cross_cats_sorted":["hep-ex"],"title_canon_sha256":"c0d17232993076ac6836d7a71e2ac2f30811caf157507fe8af2bc5c184e68000","abstract_canon_sha256":"c8363da6765c313eb5d67b50696e6f4d26bd126e7c1932eaddd6ae9bde9cac30"},"schema_version":"1.0"},"canonical_sha256":"66b0531e66f8c2c328d6f7e41ca5514c917100bd15b7a23fa696e70f971cf253","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:41:19.132305Z","signature_b64":"4oK/1tKc50sDLIJ7xt7oohR/B18eajAruYF+C7HEGLvZIn4ubAbh+J0W7IKwLTN39I0zVTTHR2DVYOg+qfAbAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"66b0531e66f8c2c328d6f7e41ca5514c917100bd15b7a23fa696e70f971cf253","last_reissued_at":"2026-05-17T23:41:19.131668Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:41:19.131668Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1907.03023","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":"2026-05-17T23:41:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4uMFma5eYOM9xeIJrjqb6agM7nNg8b11/0dd8B+fqWSy/AyQ/Ug6l2AdU4qWezIogTcfMpP6czdEXPTAwMNFDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T00:49:30.781357Z"},"content_sha256":"54483dd4e3bc1b75bc50e6b728302a7bf0b599ebb92a1e1ab8b03e4976b04980","schema_version":"1.0","event_id":"sha256:54483dd4e3bc1b75bc50e6b728302a7bf0b599ebb92a1e1ab8b03e4976b04980"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:M2YFGHTG7DBMGKGW67SBZJKRJS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A rapid and accurate method of finding light leaks in photomultiplier systems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"physics.ins-det","authors_text":"John McMillan","submitted_at":"2019-07-03T10:50:23Z","abstract_excerpt":"A rapid method of finding light leaks in photomultiplier systems is described, in which an audible signal derived from the light level is produced. It uses equipment commonly available in laboratories. In practice it is like using a geiger counter to detect radioactivity."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.03023","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":"2026-05-17T23:41:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"F+Wu6fp8+CBVpjZjQavylXmwblLr0ZZgFtA/H9C35lWHN1rAvK+6Il+BEsIWn9z2Uj9znBspjRd719ntWAtABw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T00:49:30.781730Z"},"content_sha256":"ae79652defba01537bd280faf616ad4fb0b076d5f5c09f439cd2a9e96cb1169c","schema_version":"1.0","event_id":"sha256:ae79652defba01537bd280faf616ad4fb0b076d5f5c09f439cd2a9e96cb1169c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/M2YFGHTG7DBMGKGW67SBZJKRJS/bundle.json","state_url":"https://pith.science/pith/M2YFGHTG7DBMGKGW67SBZJKRJS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/M2YFGHTG7DBMGKGW67SBZJKRJS/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":"2026-06-26T00:49:30Z","links":{"resolver":"https://pith.science/pith/M2YFGHTG7DBMGKGW67SBZJKRJS","bundle":"https://pith.science/pith/M2YFGHTG7DBMGKGW67SBZJKRJS/bundle.json","state":"https://pith.science/pith/M2YFGHTG7DBMGKGW67SBZJKRJS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/M2YFGHTG7DBMGKGW67SBZJKRJS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:M2YFGHTG7DBMGKGW67SBZJKRJS","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":"c8363da6765c313eb5d67b50696e6f4d26bd126e7c1932eaddd6ae9bde9cac30","cross_cats_sorted":["hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2019-07-03T10:50:23Z","title_canon_sha256":"c0d17232993076ac6836d7a71e2ac2f30811caf157507fe8af2bc5c184e68000"},"schema_version":"1.0","source":{"id":"1907.03023","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.03023","created_at":"2026-05-17T23:41:19Z"},{"alias_kind":"arxiv_version","alias_value":"1907.03023v1","created_at":"2026-05-17T23:41:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.03023","created_at":"2026-05-17T23:41:19Z"},{"alias_kind":"pith_short_12","alias_value":"M2YFGHTG7DBM","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"M2YFGHTG7DBMGKGW","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"M2YFGHTG","created_at":"2026-05-18T12:33:21Z"}],"graph_snapshots":[{"event_id":"sha256:ae79652defba01537bd280faf616ad4fb0b076d5f5c09f439cd2a9e96cb1169c","target":"graph","created_at":"2026-05-17T23:41:19Z","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":"A rapid method of finding light leaks in photomultiplier systems is described, in which an audible signal derived from the light level is produced. It uses equipment commonly available in laboratories. In practice it is like using a geiger counter to detect radioactivity.","authors_text":"John McMillan","cross_cats":["hep-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2019-07-03T10:50:23Z","title":"A rapid and accurate method of finding light leaks in photomultiplier systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.03023","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":"sha256:54483dd4e3bc1b75bc50e6b728302a7bf0b599ebb92a1e1ab8b03e4976b04980","target":"record","created_at":"2026-05-17T23:41:19Z","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":"c8363da6765c313eb5d67b50696e6f4d26bd126e7c1932eaddd6ae9bde9cac30","cross_cats_sorted":["hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2019-07-03T10:50:23Z","title_canon_sha256":"c0d17232993076ac6836d7a71e2ac2f30811caf157507fe8af2bc5c184e68000"},"schema_version":"1.0","source":{"id":"1907.03023","kind":"arxiv","version":1}},"canonical_sha256":"66b0531e66f8c2c328d6f7e41ca5514c917100bd15b7a23fa696e70f971cf253","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"66b0531e66f8c2c328d6f7e41ca5514c917100bd15b7a23fa696e70f971cf253","first_computed_at":"2026-05-17T23:41:19.131668Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:41:19.131668Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4oK/1tKc50sDLIJ7xt7oohR/B18eajAruYF+C7HEGLvZIn4ubAbh+J0W7IKwLTN39I0zVTTHR2DVYOg+qfAbAg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:41:19.132305Z","signed_message":"canonical_sha256_bytes"},"source_id":"1907.03023","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:54483dd4e3bc1b75bc50e6b728302a7bf0b599ebb92a1e1ab8b03e4976b04980","sha256:ae79652defba01537bd280faf616ad4fb0b076d5f5c09f439cd2a9e96cb1169c"],"state_sha256":"ae29ced7cb12a16f95fcffdf460f84da7055bde7d7c4a2191563be2e0818ae88"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wzOJy7ZJDgnZtMMC2oooi8jKjSqLFmS3+M/Zx8oFJZDV7x2oblYt7qFYTV0t0zdhkpzkfFonTNuMtzCTWOlFCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-26T00:49:30.783687Z","bundle_sha256":"29022a5670ed3cb2e7a1e43d6a7bb558eae938e742d6afafa947b44a75bf8272"}}