{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:WBMDWD5NBHWSPH2X2UKMGAGPBQ","short_pith_number":"pith:WBMDWD5N","canonical_record":{"source":{"id":"1703.05272","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2017-03-15T17:18:42Z","cross_cats_sorted":["nucl-ex"],"title_canon_sha256":"72e4f4a748c0ab10ba798e7ab328675ce55df6ff7f6d405d65c4216546bc9784","abstract_canon_sha256":"1bddff79cde6794200412d085bb34af5ca9c7f201381608656639d3b354af58f"},"schema_version":"1.0"},"canonical_sha256":"b0583b0fad09ed279f57d514c300cf0c38b8aa6effc9ed715e47836f1d84580c","source":{"kind":"arxiv","id":"1703.05272","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1703.05272","created_at":"2026-05-18T00:24:31Z"},{"alias_kind":"arxiv_version","alias_value":"1703.05272v1","created_at":"2026-05-18T00:24:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1703.05272","created_at":"2026-05-18T00:24:31Z"},{"alias_kind":"pith_short_12","alias_value":"WBMDWD5NBHWS","created_at":"2026-05-18T12:31:53Z"},{"alias_kind":"pith_short_16","alias_value":"WBMDWD5NBHWSPH2X","created_at":"2026-05-18T12:31:53Z"},{"alias_kind":"pith_short_8","alias_value":"WBMDWD5N","created_at":"2026-05-18T12:31:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:WBMDWD5NBHWSPH2X2UKMGAGPBQ","target":"record","payload":{"canonical_record":{"source":{"id":"1703.05272","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2017-03-15T17:18:42Z","cross_cats_sorted":["nucl-ex"],"title_canon_sha256":"72e4f4a748c0ab10ba798e7ab328675ce55df6ff7f6d405d65c4216546bc9784","abstract_canon_sha256":"1bddff79cde6794200412d085bb34af5ca9c7f201381608656639d3b354af58f"},"schema_version":"1.0"},"canonical_sha256":"b0583b0fad09ed279f57d514c300cf0c38b8aa6effc9ed715e47836f1d84580c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:24:31.436485Z","signature_b64":"x2Xz5kgDrHZ7Wazj6wbBIWrp7UIYfx9+ks7zONxw2b14UUO6sMX5LBHvgdN821xVdg3+WWX0qK0bOQfHrEs2Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b0583b0fad09ed279f57d514c300cf0c38b8aa6effc9ed715e47836f1d84580c","last_reissued_at":"2026-05-18T00:24:31.435984Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:24:31.435984Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1703.05272","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":"2026-05-18T00:24:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"e4WGuim4eAmUtiiIunsFm/l1Oqyt0E5hVEA0USYq3kEPk+ANhQ9pFTJCmks1BAqRNqumGf6cQoaR7vhhq8c9AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T05:10:12.760592Z"},"content_sha256":"eb578ccd7d0a7e12bf27544217769328dfa994109119a55b38ae8f1ddd9fafd1","schema_version":"1.0","event_id":"sha256:eb578ccd7d0a7e12bf27544217769328dfa994109119a55b38ae8f1ddd9fafd1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:WBMDWD5NBHWSPH2X2UKMGAGPBQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A pulsed, mono-energetic and angular-selective UV photo-electron source for the commissioning of the KATRIN experiment","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-ex"],"primary_cat":"physics.ins-det","authors_text":"A. Beglarian, C. Weinheimer, D. Winzen, H.-W. Ortjohann, J. Behrens, J. F. Wilkerson, K. Schl\\\"osser, K. Valerius, K. Wierman, M. Beck, M. Erhard, M. Kraus, M. Zacher, O. Rest, P. C.-O. Ranitzsch, S. Groh, T. Th\\\"ummler, V. Hannen","submitted_at":"2017-03-15T17:18:42Z","abstract_excerpt":"The KATRIN experiment aims to determine the neutrino mass scale with a sensitivity of 200 meV/c^2 (90% C.L.) by a precision measurement of the shape of the tritium $\\beta$-spectrum in the endpoint region. The energy analysis of the decay electrons is achieved by a MAC-E filter spectrometer. To determine the transmission properties of the KATRIN main spectrometer, a mono-energetic and angular-selective electron source has been developed. In preparation for the second commissioning phase of the main spectrometer, a measurement phase was carried out at the KATRIN monitor spectrometer where the de"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.05272","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":"2026-05-18T00:24:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"O3qFPk2+IKdD7BCCuCFSbUa+TUm7q0+jJZJO9+sy1qL5hvuRIfcqIAi8tI602bA8XB2IVMTRzlAgHmoTWh2hDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T05:10:12.760953Z"},"content_sha256":"d8322a2719e360e508cb5982631d99d9fa9e4f0ccc96d475ca0a027584579897","schema_version":"1.0","event_id":"sha256:d8322a2719e360e508cb5982631d99d9fa9e4f0ccc96d475ca0a027584579897"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WBMDWD5NBHWSPH2X2UKMGAGPBQ/bundle.json","state_url":"https://pith.science/pith/WBMDWD5NBHWSPH2X2UKMGAGPBQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WBMDWD5NBHWSPH2X2UKMGAGPBQ/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":"2026-06-02T05:10:12Z","links":{"resolver":"https://pith.science/pith/WBMDWD5NBHWSPH2X2UKMGAGPBQ","bundle":"https://pith.science/pith/WBMDWD5NBHWSPH2X2UKMGAGPBQ/bundle.json","state":"https://pith.science/pith/WBMDWD5NBHWSPH2X2UKMGAGPBQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WBMDWD5NBHWSPH2X2UKMGAGPBQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:WBMDWD5NBHWSPH2X2UKMGAGPBQ","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":"1bddff79cde6794200412d085bb34af5ca9c7f201381608656639d3b354af58f","cross_cats_sorted":["nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2017-03-15T17:18:42Z","title_canon_sha256":"72e4f4a748c0ab10ba798e7ab328675ce55df6ff7f6d405d65c4216546bc9784"},"schema_version":"1.0","source":{"id":"1703.05272","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1703.05272","created_at":"2026-05-18T00:24:31Z"},{"alias_kind":"arxiv_version","alias_value":"1703.05272v1","created_at":"2026-05-18T00:24:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1703.05272","created_at":"2026-05-18T00:24:31Z"},{"alias_kind":"pith_short_12","alias_value":"WBMDWD5NBHWS","created_at":"2026-05-18T12:31:53Z"},{"alias_kind":"pith_short_16","alias_value":"WBMDWD5NBHWSPH2X","created_at":"2026-05-18T12:31:53Z"},{"alias_kind":"pith_short_8","alias_value":"WBMDWD5N","created_at":"2026-05-18T12:31:53Z"}],"graph_snapshots":[{"event_id":"sha256:d8322a2719e360e508cb5982631d99d9fa9e4f0ccc96d475ca0a027584579897","target":"graph","created_at":"2026-05-18T00:24:31Z","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 KATRIN experiment aims to determine the neutrino mass scale with a sensitivity of 200 meV/c^2 (90% C.L.) by a precision measurement of the shape of the tritium $\\beta$-spectrum in the endpoint region. The energy analysis of the decay electrons is achieved by a MAC-E filter spectrometer. To determine the transmission properties of the KATRIN main spectrometer, a mono-energetic and angular-selective electron source has been developed. In preparation for the second commissioning phase of the main spectrometer, a measurement phase was carried out at the KATRIN monitor spectrometer where the de","authors_text":"A. Beglarian, C. Weinheimer, D. Winzen, H.-W. Ortjohann, J. Behrens, J. F. Wilkerson, K. Schl\\\"osser, K. Valerius, K. Wierman, M. Beck, M. Erhard, M. Kraus, M. Zacher, O. Rest, P. C.-O. Ranitzsch, S. Groh, T. Th\\\"ummler, V. Hannen","cross_cats":["nucl-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2017-03-15T17:18:42Z","title":"A pulsed, mono-energetic and angular-selective UV photo-electron source for the commissioning of the KATRIN experiment"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.05272","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:eb578ccd7d0a7e12bf27544217769328dfa994109119a55b38ae8f1ddd9fafd1","target":"record","created_at":"2026-05-18T00:24:31Z","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":"1bddff79cde6794200412d085bb34af5ca9c7f201381608656639d3b354af58f","cross_cats_sorted":["nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2017-03-15T17:18:42Z","title_canon_sha256":"72e4f4a748c0ab10ba798e7ab328675ce55df6ff7f6d405d65c4216546bc9784"},"schema_version":"1.0","source":{"id":"1703.05272","kind":"arxiv","version":1}},"canonical_sha256":"b0583b0fad09ed279f57d514c300cf0c38b8aa6effc9ed715e47836f1d84580c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b0583b0fad09ed279f57d514c300cf0c38b8aa6effc9ed715e47836f1d84580c","first_computed_at":"2026-05-18T00:24:31.435984Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:24:31.435984Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"x2Xz5kgDrHZ7Wazj6wbBIWrp7UIYfx9+ks7zONxw2b14UUO6sMX5LBHvgdN821xVdg3+WWX0qK0bOQfHrEs2Bg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:24:31.436485Z","signed_message":"canonical_sha256_bytes"},"source_id":"1703.05272","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:eb578ccd7d0a7e12bf27544217769328dfa994109119a55b38ae8f1ddd9fafd1","sha256:d8322a2719e360e508cb5982631d99d9fa9e4f0ccc96d475ca0a027584579897"],"state_sha256":"8abe52b312536ad585ebd8df9a23b738d61120347f719dfd3f44a28298a1438d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VjM0Hxw/sS2LpiWNSiyp+PXctbRfmPlKwa+leiAPDOW6WtSee6jeEB54xliEzm7sdHyVr7vbu/B57oRa7r7bBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T05:10:12.762972Z","bundle_sha256":"1bc16f23c6d3a80fb9c62b04652743a83346ca7da8d2be44cc98ec6d0372208d"}}