{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:6IJPLNCMEAMYQBB6WARPVTI5BO","short_pith_number":"pith:6IJPLNCM","canonical_record":{"source":{"id":"2004.07693","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ins-det","submitted_at":"2020-04-16T15:07:09Z","cross_cats_sorted":[],"title_canon_sha256":"e0b504ce2b96fc517296d0feee493bbf025f06cca2292c6803f18094c857fa75","abstract_canon_sha256":"8f3506311d32591611b0a826eb258f5676d49e6eb83ee2c96f0621f154c69396"},"schema_version":"1.0"},"canonical_sha256":"f212f5b44c201988043eb022facd1d0b89e42ff5a2fd253c8724879b1fa7c34e","source":{"kind":"arxiv","id":"2004.07693","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2004.07693","created_at":"2026-07-05T00:55:35Z"},{"alias_kind":"arxiv_version","alias_value":"2004.07693v1","created_at":"2026-07-05T00:55:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2004.07693","created_at":"2026-07-05T00:55:35Z"},{"alias_kind":"pith_short_12","alias_value":"6IJPLNCMEAMY","created_at":"2026-07-05T00:55:35Z"},{"alias_kind":"pith_short_16","alias_value":"6IJPLNCMEAMYQBB6","created_at":"2026-07-05T00:55:35Z"},{"alias_kind":"pith_short_8","alias_value":"6IJPLNCM","created_at":"2026-07-05T00:55:35Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:6IJPLNCMEAMYQBB6WARPVTI5BO","target":"record","payload":{"canonical_record":{"source":{"id":"2004.07693","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ins-det","submitted_at":"2020-04-16T15:07:09Z","cross_cats_sorted":[],"title_canon_sha256":"e0b504ce2b96fc517296d0feee493bbf025f06cca2292c6803f18094c857fa75","abstract_canon_sha256":"8f3506311d32591611b0a826eb258f5676d49e6eb83ee2c96f0621f154c69396"},"schema_version":"1.0"},"canonical_sha256":"f212f5b44c201988043eb022facd1d0b89e42ff5a2fd253c8724879b1fa7c34e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:55:35.753755Z","signature_b64":"l0HbV7VV+tnl3PRCrwvQiGoC/z41NBiWfekRyXKTa+DFmV/pHOYLZNCDXH4fo2w7ELGkYbHfIdIA6DVSZQg4BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f212f5b44c201988043eb022facd1d0b89e42ff5a2fd253c8724879b1fa7c34e","last_reissued_at":"2026-07-05T00:55:35.753185Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:55:35.753185Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2004.07693","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":"2026-07-05T00:55:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"l1mpw5c4YugpoEkRAluTzfu6OvpBqT77bpXXtY3eOEVZV4qVRewBfndQc9fhyv7+YnH6JyPA2voAplM6SuECBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T13:49:23.700897Z"},"content_sha256":"c842940850212757644b4879caf64d0838c782e0108a00f7228b0ff2091dd586","schema_version":"1.0","event_id":"sha256:c842940850212757644b4879caf64d0838c782e0108a00f7228b0ff2091dd586"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:6IJPLNCMEAMYQBB6WARPVTI5BO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Hunting keV sterile neutrinos with KATRIN: building the first TRISTAN module","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.ins-det","authors_text":"Alexander Sedlak, Anton Huber, Antonio Alborini, Carlo Fiorini, Daniel Siegmann, David Fink, David Radford, Joachim Wolf, Konrad Altenm\\\"uller, Korbinian Urban, Luca Bombelli, Manuel Lebert, Marc Korzeczek, Marco Carminati, Martin Descher, Matteo Biassoni, Matteo Gugiatti, Maura Pavan, Peter Lechner, Pietro King, Stefano Pozzi, Susanne Mertens, Thibaut Houdy, Tim Brunst","submitted_at":"2020-04-16T15:07:09Z","abstract_excerpt":"The KATRIN (Karlsruhe Tritium Neutrino) experiment investigates the energetic endpoint of the tritium beta-decay spectrum to determine the effective mass of the electron anti-neutrino. The collaboration has reported a first mass measurement result at this TAUP-2019 conference. The TRISTAN project aims at detecting a keV-sterile neutrino signature by measuring the entire tritium beta-decay spectrum with an upgraded KATRIN system. One of the greatest challenges is to handle the high signal rates generated by the strong activity of the KATRIN tritium source while maintaining a good energy resolut"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2004.07693","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2004.07693/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":"2026-07-05T00:55:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SpzMccHNZygKsYwn9LOjkNKNW2XR/CYnclpEau9Pwoqs4pHMPq59Oneb/2s7X96/kled1WBwLo+A/fRrrcKTBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T13:49:23.701271Z"},"content_sha256":"8a592689f214e2e183b92a0e9a0a02f8008eef4a3bfb73f4b6eda3f2de69e26d","schema_version":"1.0","event_id":"sha256:8a592689f214e2e183b92a0e9a0a02f8008eef4a3bfb73f4b6eda3f2de69e26d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6IJPLNCMEAMYQBB6WARPVTI5BO/bundle.json","state_url":"https://pith.science/pith/6IJPLNCMEAMYQBB6WARPVTI5BO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6IJPLNCMEAMYQBB6WARPVTI5BO/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":"2026-07-06T13:49:23Z","links":{"resolver":"https://pith.science/pith/6IJPLNCMEAMYQBB6WARPVTI5BO","bundle":"https://pith.science/pith/6IJPLNCMEAMYQBB6WARPVTI5BO/bundle.json","state":"https://pith.science/pith/6IJPLNCMEAMYQBB6WARPVTI5BO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6IJPLNCMEAMYQBB6WARPVTI5BO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:6IJPLNCMEAMYQBB6WARPVTI5BO","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":"8f3506311d32591611b0a826eb258f5676d49e6eb83ee2c96f0621f154c69396","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ins-det","submitted_at":"2020-04-16T15:07:09Z","title_canon_sha256":"e0b504ce2b96fc517296d0feee493bbf025f06cca2292c6803f18094c857fa75"},"schema_version":"1.0","source":{"id":"2004.07693","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2004.07693","created_at":"2026-07-05T00:55:35Z"},{"alias_kind":"arxiv_version","alias_value":"2004.07693v1","created_at":"2026-07-05T00:55:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2004.07693","created_at":"2026-07-05T00:55:35Z"},{"alias_kind":"pith_short_12","alias_value":"6IJPLNCMEAMY","created_at":"2026-07-05T00:55:35Z"},{"alias_kind":"pith_short_16","alias_value":"6IJPLNCMEAMYQBB6","created_at":"2026-07-05T00:55:35Z"},{"alias_kind":"pith_short_8","alias_value":"6IJPLNCM","created_at":"2026-07-05T00:55:35Z"}],"graph_snapshots":[{"event_id":"sha256:8a592689f214e2e183b92a0e9a0a02f8008eef4a3bfb73f4b6eda3f2de69e26d","target":"graph","created_at":"2026-07-05T00:55:35Z","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/2004.07693/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The KATRIN (Karlsruhe Tritium Neutrino) experiment investigates the energetic endpoint of the tritium beta-decay spectrum to determine the effective mass of the electron anti-neutrino. The collaboration has reported a first mass measurement result at this TAUP-2019 conference. The TRISTAN project aims at detecting a keV-sterile neutrino signature by measuring the entire tritium beta-decay spectrum with an upgraded KATRIN system. One of the greatest challenges is to handle the high signal rates generated by the strong activity of the KATRIN tritium source while maintaining a good energy resolut","authors_text":"Alexander Sedlak, Anton Huber, Antonio Alborini, Carlo Fiorini, Daniel Siegmann, David Fink, David Radford, Joachim Wolf, Konrad Altenm\\\"uller, Korbinian Urban, Luca Bombelli, Manuel Lebert, Marc Korzeczek, Marco Carminati, Martin Descher, Matteo Biassoni, Matteo Gugiatti, Maura Pavan, Peter Lechner, Pietro King, Stefano Pozzi, Susanne Mertens, Thibaut Houdy, Tim Brunst","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ins-det","submitted_at":"2020-04-16T15:07:09Z","title":"Hunting keV sterile neutrinos with KATRIN: building the first TRISTAN module"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2004.07693","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:c842940850212757644b4879caf64d0838c782e0108a00f7228b0ff2091dd586","target":"record","created_at":"2026-07-05T00:55:35Z","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":"8f3506311d32591611b0a826eb258f5676d49e6eb83ee2c96f0621f154c69396","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ins-det","submitted_at":"2020-04-16T15:07:09Z","title_canon_sha256":"e0b504ce2b96fc517296d0feee493bbf025f06cca2292c6803f18094c857fa75"},"schema_version":"1.0","source":{"id":"2004.07693","kind":"arxiv","version":1}},"canonical_sha256":"f212f5b44c201988043eb022facd1d0b89e42ff5a2fd253c8724879b1fa7c34e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f212f5b44c201988043eb022facd1d0b89e42ff5a2fd253c8724879b1fa7c34e","first_computed_at":"2026-07-05T00:55:35.753185Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:55:35.753185Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"l0HbV7VV+tnl3PRCrwvQiGoC/z41NBiWfekRyXKTa+DFmV/pHOYLZNCDXH4fo2w7ELGkYbHfIdIA6DVSZQg4BA==","signature_status":"signed_v1","signed_at":"2026-07-05T00:55:35.753755Z","signed_message":"canonical_sha256_bytes"},"source_id":"2004.07693","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c842940850212757644b4879caf64d0838c782e0108a00f7228b0ff2091dd586","sha256:8a592689f214e2e183b92a0e9a0a02f8008eef4a3bfb73f4b6eda3f2de69e26d"],"state_sha256":"924ccd3796af8f77da5f3b7dd2fe914dc47d24036465a7419044e550901cc6d8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AT+4nMvGxtmeFPlOW8hMKzDXlh5WdU5PSt8jZjyvudCbRtgHGP1PSx4HtknjChoVnfsF/Pw0DyGvYqzDOMD7Ag==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-06T13:49:23.703252Z","bundle_sha256":"7e33d83f96bad19b5d269f89903bf5ef3ecf66da84059bd785edc7b019c7cbed"}}