{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:CYPB5UNZF7Y7S4AN3A6INIHKVH","short_pith_number":"pith:CYPB5UNZ","canonical_record":{"source":{"id":"1108.3116","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2011-08-15T23:06:01Z","cross_cats_sorted":[],"title_canon_sha256":"17034702843a586f408de918f005abb8a59e9da8874bec598dc2763408ac65bb","abstract_canon_sha256":"f05ae5ca1b27f7a51a9d90677307c604bdf7a4999171e279fa8ffa40cdc39e00"},"schema_version":"1.0"},"canonical_sha256":"161e1ed1b92ff1f9700dd83c86a0eaa9d2218ece1040b638f7ae430a07873fbe","source":{"kind":"arxiv","id":"1108.3116","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1108.3116","created_at":"2026-05-18T02:00:53Z"},{"alias_kind":"arxiv_version","alias_value":"1108.3116v2","created_at":"2026-05-18T02:00:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1108.3116","created_at":"2026-05-18T02:00:53Z"},{"alias_kind":"pith_short_12","alias_value":"CYPB5UNZF7Y7","created_at":"2026-05-18T12:26:26Z"},{"alias_kind":"pith_short_16","alias_value":"CYPB5UNZF7Y7S4AN","created_at":"2026-05-18T12:26:26Z"},{"alias_kind":"pith_short_8","alias_value":"CYPB5UNZ","created_at":"2026-05-18T12:26:26Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:CYPB5UNZF7Y7S4AN3A6INIHKVH","target":"record","payload":{"canonical_record":{"source":{"id":"1108.3116","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2011-08-15T23:06:01Z","cross_cats_sorted":[],"title_canon_sha256":"17034702843a586f408de918f005abb8a59e9da8874bec598dc2763408ac65bb","abstract_canon_sha256":"f05ae5ca1b27f7a51a9d90677307c604bdf7a4999171e279fa8ffa40cdc39e00"},"schema_version":"1.0"},"canonical_sha256":"161e1ed1b92ff1f9700dd83c86a0eaa9d2218ece1040b638f7ae430a07873fbe","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:00:53.582334Z","signature_b64":"ypEwiw3zGlafgRcDHMBVQzLYhwhSrVW/cTKrPF4qBf5gBYVmlwKXEu5VCRdAOrwo50LgiExcs14eUGf6jSCADA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"161e1ed1b92ff1f9700dd83c86a0eaa9d2218ece1040b638f7ae430a07873fbe","last_reissued_at":"2026-05-18T02:00:53.581458Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:00:53.581458Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1108.3116","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:00:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7J+vkYUBwIilVRSXizDU7RFDHJ4b1plGZ8RWQKe6qQXR5P0HQioHCunf8XiLE5P/qM2+SG32NuYBXXErUT45AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T15:01:34.240002Z"},"content_sha256":"80d8a2630b367d8f3c3acc1a9ec1f2a343b9cef194b0fb02bcde6942b0e4e6d8","schema_version":"1.0","event_id":"sha256:80d8a2630b367d8f3c3acc1a9ec1f2a343b9cef194b0fb02bcde6942b0e4e6d8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:CYPB5UNZF7Y7S4AN3A6INIHKVH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Upgraded photon calorimeter with integrating readout for Hall A Compton Polarimeter at Jefferson Lab","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.ins-det","authors_text":"A. Camsonne, A. Rakhman, A. Tobias, B. Quinn, D. Parno, F. Benmokhtar, G. B. Franklin, K. Paschke, M. Dalton, M. Friend, P. Souder, R. Michaels, S. Nanda, V. Mamyan, V. Nelyubin","submitted_at":"2011-08-15T23:06:01Z","abstract_excerpt":"The photon arm of the Compton polarimeter in Hall A of Jefferson Lab has been upgraded to allow for electron beam polarization measurements with better than 1% accuracy. The data acquisition system (DAQ) now includes an integrating mode, which eliminates several systematic uncertainties inherent in the original counting-DAQ setup. The photon calorimeter has been replaced with a Ce-doped GSO crystal, which has a bright output and fast response, and works well for measurements using the new integrating method at electron beam energies from 1 to 6 GeV."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1108.3116","kind":"arxiv","version":2},"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":"2026-05-18T02:00:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ppU3ZjacMstuEhvDcRO6pXTIcP15iNWVEiinn4MUeE4qjFs+iQ29oBIhLsFsp6lHEn3NVF/EtDWT3+1IWr5VDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T15:01:34.240353Z"},"content_sha256":"0dfdebf6ee81cdb641b72fda8d267434ca86d6e096d572989c41766c58ec48ef","schema_version":"1.0","event_id":"sha256:0dfdebf6ee81cdb641b72fda8d267434ca86d6e096d572989c41766c58ec48ef"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CYPB5UNZF7Y7S4AN3A6INIHKVH/bundle.json","state_url":"https://pith.science/pith/CYPB5UNZF7Y7S4AN3A6INIHKVH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CYPB5UNZF7Y7S4AN3A6INIHKVH/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":"2026-06-01T15:01:34Z","links":{"resolver":"https://pith.science/pith/CYPB5UNZF7Y7S4AN3A6INIHKVH","bundle":"https://pith.science/pith/CYPB5UNZF7Y7S4AN3A6INIHKVH/bundle.json","state":"https://pith.science/pith/CYPB5UNZF7Y7S4AN3A6INIHKVH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CYPB5UNZF7Y7S4AN3A6INIHKVH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:CYPB5UNZF7Y7S4AN3A6INIHKVH","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":"f05ae5ca1b27f7a51a9d90677307c604bdf7a4999171e279fa8ffa40cdc39e00","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2011-08-15T23:06:01Z","title_canon_sha256":"17034702843a586f408de918f005abb8a59e9da8874bec598dc2763408ac65bb"},"schema_version":"1.0","source":{"id":"1108.3116","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1108.3116","created_at":"2026-05-18T02:00:53Z"},{"alias_kind":"arxiv_version","alias_value":"1108.3116v2","created_at":"2026-05-18T02:00:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1108.3116","created_at":"2026-05-18T02:00:53Z"},{"alias_kind":"pith_short_12","alias_value":"CYPB5UNZF7Y7","created_at":"2026-05-18T12:26:26Z"},{"alias_kind":"pith_short_16","alias_value":"CYPB5UNZF7Y7S4AN","created_at":"2026-05-18T12:26:26Z"},{"alias_kind":"pith_short_8","alias_value":"CYPB5UNZ","created_at":"2026-05-18T12:26:26Z"}],"graph_snapshots":[{"event_id":"sha256:0dfdebf6ee81cdb641b72fda8d267434ca86d6e096d572989c41766c58ec48ef","target":"graph","created_at":"2026-05-18T02:00:53Z","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":"The photon arm of the Compton polarimeter in Hall A of Jefferson Lab has been upgraded to allow for electron beam polarization measurements with better than 1% accuracy. The data acquisition system (DAQ) now includes an integrating mode, which eliminates several systematic uncertainties inherent in the original counting-DAQ setup. The photon calorimeter has been replaced with a Ce-doped GSO crystal, which has a bright output and fast response, and works well for measurements using the new integrating method at electron beam energies from 1 to 6 GeV.","authors_text":"A. Camsonne, A. Rakhman, A. Tobias, B. Quinn, D. Parno, F. Benmokhtar, G. B. Franklin, K. Paschke, M. Dalton, M. Friend, P. Souder, R. Michaels, S. Nanda, V. Mamyan, V. Nelyubin","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2011-08-15T23:06:01Z","title":"Upgraded photon calorimeter with integrating readout for Hall A Compton Polarimeter at Jefferson Lab"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1108.3116","kind":"arxiv","version":2},"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":"sha256:80d8a2630b367d8f3c3acc1a9ec1f2a343b9cef194b0fb02bcde6942b0e4e6d8","target":"record","created_at":"2026-05-18T02:00:53Z","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":"f05ae5ca1b27f7a51a9d90677307c604bdf7a4999171e279fa8ffa40cdc39e00","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2011-08-15T23:06:01Z","title_canon_sha256":"17034702843a586f408de918f005abb8a59e9da8874bec598dc2763408ac65bb"},"schema_version":"1.0","source":{"id":"1108.3116","kind":"arxiv","version":2}},"canonical_sha256":"161e1ed1b92ff1f9700dd83c86a0eaa9d2218ece1040b638f7ae430a07873fbe","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"161e1ed1b92ff1f9700dd83c86a0eaa9d2218ece1040b638f7ae430a07873fbe","first_computed_at":"2026-05-18T02:00:53.581458Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:00:53.581458Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ypEwiw3zGlafgRcDHMBVQzLYhwhSrVW/cTKrPF4qBf5gBYVmlwKXEu5VCRdAOrwo50LgiExcs14eUGf6jSCADA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:00:53.582334Z","signed_message":"canonical_sha256_bytes"},"source_id":"1108.3116","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:80d8a2630b367d8f3c3acc1a9ec1f2a343b9cef194b0fb02bcde6942b0e4e6d8","sha256:0dfdebf6ee81cdb641b72fda8d267434ca86d6e096d572989c41766c58ec48ef"],"state_sha256":"9d3e8bb9f493c4df49fe0b0346aaa38c17e5acc5017b2526bb0f04437a9ce713"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Yy0vZA1Y2HtUnBg5w2yLt7V1x1zrro6l+FdFo6r/XlndCkTBk4W8FdBs/SAhU2a4vXzNWCjquEQVBtIqupeqAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T15:01:34.242220Z","bundle_sha256":"b842882379be0315a05d87f4fc0bbedd7bca8f1c61fa8aabf4e12f4ef6303368"}}