{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:TTE7NZ72PJLDPTQYIKA7FEGOZP","short_pith_number":"pith:TTE7NZ72","canonical_record":{"source":{"id":"1909.08730","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2019-09-18T22:37:31Z","cross_cats_sorted":[],"title_canon_sha256":"0ccc007bcbfd5ea4007604ef58b28232fdab5736da4e5bae0d04966f3a5c2613","abstract_canon_sha256":"5b35529d7dff0e620ac8d581e81878288e3986c7ddb5bca2bfe26ed9b319ad40"},"schema_version":"1.0"},"canonical_sha256":"9cc9f6e7fa7a5637ce184281f290cecbe8429830d652fe89e56514c442588b07","source":{"kind":"arxiv","id":"1909.08730","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1909.08730","created_at":"2026-07-05T00:51:04Z"},{"alias_kind":"arxiv_version","alias_value":"1909.08730v4","created_at":"2026-07-05T00:51:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1909.08730","created_at":"2026-07-05T00:51:04Z"},{"alias_kind":"pith_short_12","alias_value":"TTE7NZ72PJLD","created_at":"2026-07-05T00:51:04Z"},{"alias_kind":"pith_short_16","alias_value":"TTE7NZ72PJLDPTQY","created_at":"2026-07-05T00:51:04Z"},{"alias_kind":"pith_short_8","alias_value":"TTE7NZ72","created_at":"2026-07-05T00:51:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:TTE7NZ72PJLDPTQYIKA7FEGOZP","target":"record","payload":{"canonical_record":{"source":{"id":"1909.08730","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2019-09-18T22:37:31Z","cross_cats_sorted":[],"title_canon_sha256":"0ccc007bcbfd5ea4007604ef58b28232fdab5736da4e5bae0d04966f3a5c2613","abstract_canon_sha256":"5b35529d7dff0e620ac8d581e81878288e3986c7ddb5bca2bfe26ed9b319ad40"},"schema_version":"1.0"},"canonical_sha256":"9cc9f6e7fa7a5637ce184281f290cecbe8429830d652fe89e56514c442588b07","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:51:04.181141Z","signature_b64":"hFn+TO45FELLwpe/gMgs+TN2gRmz/fWa6/QpgtwOHd2DGQedI6AR8WT1J9ZYgGjJt+saNHEuEquWGVX575dPCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9cc9f6e7fa7a5637ce184281f290cecbe8429830d652fe89e56514c442588b07","last_reissued_at":"2026-07-05T00:51:04.180531Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:51:04.180531Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1909.08730","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T00:51:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"upfuTNq3Ga1s8gPZCXgCw6NH0+9cxNcxjXBA47YcAYaekyIdPr4Vc460IQnfyoLWJD1QA4HFQvU5Y9SqZPv9Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T16:10:17.611282Z"},"content_sha256":"c5da63f1f107f6cd155aebc9b27db9fb61e6ee9a90fdcbb21d876221bb2d6b91","schema_version":"1.0","event_id":"sha256:c5da63f1f107f6cd155aebc9b27db9fb61e6ee9a90fdcbb21d876221bb2d6b91"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:TTE7NZ72PJLDPTQYIKA7FEGOZP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Measurements of Angle-Resolved Reflectivity of PTFE in Liquid Xenon with IBEX","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.ins-det","authors_text":"D.N. McKinsey, E.P. Bernard, G.D. Orebi Gann, L. Hagaman, L. Rudd, L. Tvrznikova, M. Sakai, R.J. Smith, S. Kravitz","submitted_at":"2019-09-18T22:37:31Z","abstract_excerpt":"Liquid xenon particle detectors rely on excellent light collection efficiency for their performance. This depends on the high reflectivity of polytetrafluoroethylene (PTFE) at the xenon scintillation wavelength of 178 nm, but the angular dependence of this reflectivity is not well-understood. IBEX is designed to directly measure the angular distribution of xenon scintillation light reflected off PTFE in liquid xenon. These measurements are fully described by a microphysical reflectivity model with few free parameters. Dependence on PTFE type, surface finish, xenon pressure, and wavelength of i"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1909.08730","kind":"arxiv","version":4},"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/1909.08730/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":"2026-07-05T00:51:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cDZYxL3Q4qqCbO6WsVJ37s1wjYheGToZKbkfml7sYjh3cF2qxTyIUGr95J4bP9ja1eszBcxhNUd2OD3RkFtmDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T16:10:17.611787Z"},"content_sha256":"d4c470cb6542f7ced9304f20c8ba2f656745f56a671e48a7b4b8d77d3281ee02","schema_version":"1.0","event_id":"sha256:d4c470cb6542f7ced9304f20c8ba2f656745f56a671e48a7b4b8d77d3281ee02"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TTE7NZ72PJLDPTQYIKA7FEGOZP/bundle.json","state_url":"https://pith.science/pith/TTE7NZ72PJLDPTQYIKA7FEGOZP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TTE7NZ72PJLDPTQYIKA7FEGOZP/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":"2026-08-03T16:10:17Z","links":{"resolver":"https://pith.science/pith/TTE7NZ72PJLDPTQYIKA7FEGOZP","bundle":"https://pith.science/pith/TTE7NZ72PJLDPTQYIKA7FEGOZP/bundle.json","state":"https://pith.science/pith/TTE7NZ72PJLDPTQYIKA7FEGOZP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TTE7NZ72PJLDPTQYIKA7FEGOZP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:TTE7NZ72PJLDPTQYIKA7FEGOZP","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":"5b35529d7dff0e620ac8d581e81878288e3986c7ddb5bca2bfe26ed9b319ad40","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2019-09-18T22:37:31Z","title_canon_sha256":"0ccc007bcbfd5ea4007604ef58b28232fdab5736da4e5bae0d04966f3a5c2613"},"schema_version":"1.0","source":{"id":"1909.08730","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1909.08730","created_at":"2026-07-05T00:51:04Z"},{"alias_kind":"arxiv_version","alias_value":"1909.08730v4","created_at":"2026-07-05T00:51:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1909.08730","created_at":"2026-07-05T00:51:04Z"},{"alias_kind":"pith_short_12","alias_value":"TTE7NZ72PJLD","created_at":"2026-07-05T00:51:04Z"},{"alias_kind":"pith_short_16","alias_value":"TTE7NZ72PJLDPTQY","created_at":"2026-07-05T00:51:04Z"},{"alias_kind":"pith_short_8","alias_value":"TTE7NZ72","created_at":"2026-07-05T00:51:04Z"}],"graph_snapshots":[{"event_id":"sha256:d4c470cb6542f7ced9304f20c8ba2f656745f56a671e48a7b4b8d77d3281ee02","target":"graph","created_at":"2026-07-05T00:51:04Z","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/1909.08730/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Liquid xenon particle detectors rely on excellent light collection efficiency for their performance. This depends on the high reflectivity of polytetrafluoroethylene (PTFE) at the xenon scintillation wavelength of 178 nm, but the angular dependence of this reflectivity is not well-understood. IBEX is designed to directly measure the angular distribution of xenon scintillation light reflected off PTFE in liquid xenon. These measurements are fully described by a microphysical reflectivity model with few free parameters. Dependence on PTFE type, surface finish, xenon pressure, and wavelength of i","authors_text":"D.N. McKinsey, E.P. Bernard, G.D. Orebi Gann, L. Hagaman, L. Rudd, L. Tvrznikova, M. Sakai, R.J. Smith, S. Kravitz","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2019-09-18T22:37:31Z","title":"Measurements of Angle-Resolved Reflectivity of PTFE in Liquid Xenon with IBEX"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1909.08730","kind":"arxiv","version":4},"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:c5da63f1f107f6cd155aebc9b27db9fb61e6ee9a90fdcbb21d876221bb2d6b91","target":"record","created_at":"2026-07-05T00:51:04Z","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":"5b35529d7dff0e620ac8d581e81878288e3986c7ddb5bca2bfe26ed9b319ad40","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2019-09-18T22:37:31Z","title_canon_sha256":"0ccc007bcbfd5ea4007604ef58b28232fdab5736da4e5bae0d04966f3a5c2613"},"schema_version":"1.0","source":{"id":"1909.08730","kind":"arxiv","version":4}},"canonical_sha256":"9cc9f6e7fa7a5637ce184281f290cecbe8429830d652fe89e56514c442588b07","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9cc9f6e7fa7a5637ce184281f290cecbe8429830d652fe89e56514c442588b07","first_computed_at":"2026-07-05T00:51:04.180531Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:51:04.180531Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hFn+TO45FELLwpe/gMgs+TN2gRmz/fWa6/QpgtwOHd2DGQedI6AR8WT1J9ZYgGjJt+saNHEuEquWGVX575dPCg==","signature_status":"signed_v1","signed_at":"2026-07-05T00:51:04.181141Z","signed_message":"canonical_sha256_bytes"},"source_id":"1909.08730","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c5da63f1f107f6cd155aebc9b27db9fb61e6ee9a90fdcbb21d876221bb2d6b91","sha256:d4c470cb6542f7ced9304f20c8ba2f656745f56a671e48a7b4b8d77d3281ee02"],"state_sha256":"9fe18fac1b1d5f036b58de9086d59e945176b4afe0c6e7d521787c9095620d64"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+xeP4W1mnQ4Ta1kdAB8Jk+d1TQKom7SXoJev0CxtZibD7TR33/toj49F+S1pBY1C5trg0Tv6lLgtmmKpVN81CA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T16:10:17.616835Z","bundle_sha256":"d7ec3eaede91688184c5f65d0d837aa13ab3f17ff761d736d672c73962722503"}}