{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:KCLQME7PFA452SROANR7O45NHL","short_pith_number":"pith:KCLQME7P","canonical_record":{"source":{"id":"1504.07651","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-04-28T20:25:04Z","cross_cats_sorted":[],"title_canon_sha256":"7b26875f3211363baeb8ef1c5c103bb452373fddebab51d77498343a271b2704","abstract_canon_sha256":"abe30b4d34d408239453118e66e78ef5d9d656279c7d9bedcbba3c769b336d15"},"schema_version":"1.0"},"canonical_sha256":"50970613ef2839dd4a2e0363f773ad3af49851f7d5467707f778b3c613e1a749","source":{"kind":"arxiv","id":"1504.07651","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.07651","created_at":"2026-05-18T01:25:00Z"},{"alias_kind":"arxiv_version","alias_value":"1504.07651v1","created_at":"2026-05-18T01:25:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.07651","created_at":"2026-05-18T01:25:00Z"},{"alias_kind":"pith_short_12","alias_value":"KCLQME7PFA45","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_16","alias_value":"KCLQME7PFA452SRO","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_8","alias_value":"KCLQME7P","created_at":"2026-05-18T12:29:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:KCLQME7PFA452SROANR7O45NHL","target":"record","payload":{"canonical_record":{"source":{"id":"1504.07651","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-04-28T20:25:04Z","cross_cats_sorted":[],"title_canon_sha256":"7b26875f3211363baeb8ef1c5c103bb452373fddebab51d77498343a271b2704","abstract_canon_sha256":"abe30b4d34d408239453118e66e78ef5d9d656279c7d9bedcbba3c769b336d15"},"schema_version":"1.0"},"canonical_sha256":"50970613ef2839dd4a2e0363f773ad3af49851f7d5467707f778b3c613e1a749","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:25:00.746637Z","signature_b64":"/ZhQYl2WsxFT8N7CGvlYS/V8Oy1UMjWYQyfowndtNWGxlA64bBVs6UBoPjjwbhZX6kVeMX/ZHPaCupkyJa8oBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"50970613ef2839dd4a2e0363f773ad3af49851f7d5467707f778b3c613e1a749","last_reissued_at":"2026-05-18T01:25:00.746079Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:25:00.746079Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1504.07651","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":"2026-05-18T01:25:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"geBrAPuC/8/nujFzAT3sgwDlEqS97j6r8QQj+kem80yjZ5UKGYR9NOAJcn6yJZvKsQETxU/mxZuAhR/SbOJHAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T16:31:15.532566Z"},"content_sha256":"0e06df6e9cdff3be2fad834318e34ce4aa722fbfe8a13c035d85cab5b85e975f","schema_version":"1.0","event_id":"sha256:0e06df6e9cdff3be2fad834318e34ce4aa722fbfe8a13c035d85cab5b85e975f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:KCLQME7PFA452SROANR7O45NHL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Observation of light emission from Hamamatsu R11410-20 photomultiplier tubes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.ins-det","authors_text":"A.I. Bolozdynya, A.V. Khromov, D.Yu. Akimov, V.A. Kaplin, V.V. Sosnovtsev, Yu.A. Melikyan, Yu.V. Efremenko","submitted_at":"2015-04-28T20:25:04Z","abstract_excerpt":"We have shown that high voltage biased Hamamatsu R11410-20 photomultipliers with a dark count rate above 10 kHz emit single photons. The effect has been observed in a few units at room temperature and temperatures reduced down to -60 degrees Celsius. The effect should be taken into account in experiments aimed on search for rare events with small energy depositions in massive liquid xenon detectors."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.07651","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":"2026-05-18T01:25:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XEbS4CI87Dt5TdFTO027arUazBln+UVo78sq2xWq+eBKaIW4axUkAn51QUrZc95oZ+hJJzJFZMfE0zZiQPLZCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T16:31:15.532919Z"},"content_sha256":"d58b5f7e97bede6b8d36b2aa4ab2ec3ec915121bcb0c67733d3e76e45b3cc405","schema_version":"1.0","event_id":"sha256:d58b5f7e97bede6b8d36b2aa4ab2ec3ec915121bcb0c67733d3e76e45b3cc405"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KCLQME7PFA452SROANR7O45NHL/bundle.json","state_url":"https://pith.science/pith/KCLQME7PFA452SROANR7O45NHL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KCLQME7PFA452SROANR7O45NHL/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":"2026-06-02T16:31:15Z","links":{"resolver":"https://pith.science/pith/KCLQME7PFA452SROANR7O45NHL","bundle":"https://pith.science/pith/KCLQME7PFA452SROANR7O45NHL/bundle.json","state":"https://pith.science/pith/KCLQME7PFA452SROANR7O45NHL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KCLQME7PFA452SROANR7O45NHL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:KCLQME7PFA452SROANR7O45NHL","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":"abe30b4d34d408239453118e66e78ef5d9d656279c7d9bedcbba3c769b336d15","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-04-28T20:25:04Z","title_canon_sha256":"7b26875f3211363baeb8ef1c5c103bb452373fddebab51d77498343a271b2704"},"schema_version":"1.0","source":{"id":"1504.07651","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.07651","created_at":"2026-05-18T01:25:00Z"},{"alias_kind":"arxiv_version","alias_value":"1504.07651v1","created_at":"2026-05-18T01:25:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.07651","created_at":"2026-05-18T01:25:00Z"},{"alias_kind":"pith_short_12","alias_value":"KCLQME7PFA45","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_16","alias_value":"KCLQME7PFA452SRO","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_8","alias_value":"KCLQME7P","created_at":"2026-05-18T12:29:27Z"}],"graph_snapshots":[{"event_id":"sha256:d58b5f7e97bede6b8d36b2aa4ab2ec3ec915121bcb0c67733d3e76e45b3cc405","target":"graph","created_at":"2026-05-18T01:25:00Z","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 have shown that high voltage biased Hamamatsu R11410-20 photomultipliers with a dark count rate above 10 kHz emit single photons. The effect has been observed in a few units at room temperature and temperatures reduced down to -60 degrees Celsius. The effect should be taken into account in experiments aimed on search for rare events with small energy depositions in massive liquid xenon detectors.","authors_text":"A.I. Bolozdynya, A.V. Khromov, D.Yu. Akimov, V.A. Kaplin, V.V. Sosnovtsev, Yu.A. Melikyan, Yu.V. Efremenko","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-04-28T20:25:04Z","title":"Observation of light emission from Hamamatsu R11410-20 photomultiplier tubes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.07651","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":"sha256:0e06df6e9cdff3be2fad834318e34ce4aa722fbfe8a13c035d85cab5b85e975f","target":"record","created_at":"2026-05-18T01:25:00Z","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":"abe30b4d34d408239453118e66e78ef5d9d656279c7d9bedcbba3c769b336d15","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-04-28T20:25:04Z","title_canon_sha256":"7b26875f3211363baeb8ef1c5c103bb452373fddebab51d77498343a271b2704"},"schema_version":"1.0","source":{"id":"1504.07651","kind":"arxiv","version":1}},"canonical_sha256":"50970613ef2839dd4a2e0363f773ad3af49851f7d5467707f778b3c613e1a749","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"50970613ef2839dd4a2e0363f773ad3af49851f7d5467707f778b3c613e1a749","first_computed_at":"2026-05-18T01:25:00.746079Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:25:00.746079Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/ZhQYl2WsxFT8N7CGvlYS/V8Oy1UMjWYQyfowndtNWGxlA64bBVs6UBoPjjwbhZX6kVeMX/ZHPaCupkyJa8oBw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:25:00.746637Z","signed_message":"canonical_sha256_bytes"},"source_id":"1504.07651","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0e06df6e9cdff3be2fad834318e34ce4aa722fbfe8a13c035d85cab5b85e975f","sha256:d58b5f7e97bede6b8d36b2aa4ab2ec3ec915121bcb0c67733d3e76e45b3cc405"],"state_sha256":"091bbfca55bef6c719d30be64204aa731571084127dcd680f6d139a6d3639626"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3R1QzjlI6AI6ie3J0MV5ZA5WjrSbyXO0/iGGTcOu5ccPM/4IdvkesxrRGUZRT2z4km/cGCyA7HUXBEU3m6WaBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T16:31:15.534894Z","bundle_sha256":"b189f66a7bf068a6ac987d5d7601328621347fbebd1c0f946a0263820f214b6a"}}