{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:KXM64JPOD2UEMV2JJ5SMXLEXYS","short_pith_number":"pith:KXM64JPO","canonical_record":{"source":{"id":"2412.19874","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2024-12-27T17:17:16Z","cross_cats_sorted":["nucl-ex"],"title_canon_sha256":"bb1915d47f74c6b443084573c9a4014895fefe758ac8cf6ce0bb97eb9814faaf","abstract_canon_sha256":"61b3c218b7738006646e809200b2ce9fb51484cadfdf0665890af3f4041ff985"},"schema_version":"1.0"},"canonical_sha256":"55d9ee25ee1ea84657494f64cbac97c4ad8e95a30ffbc7ccebb503e7cb7049da","source":{"kind":"arxiv","id":"2412.19874","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2412.19874","created_at":"2026-07-05T10:07:29Z"},{"alias_kind":"arxiv_version","alias_value":"2412.19874v1","created_at":"2026-07-05T10:07:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2412.19874","created_at":"2026-07-05T10:07:29Z"},{"alias_kind":"pith_short_12","alias_value":"KXM64JPOD2UE","created_at":"2026-07-05T10:07:29Z"},{"alias_kind":"pith_short_16","alias_value":"KXM64JPOD2UEMV2J","created_at":"2026-07-05T10:07:29Z"},{"alias_kind":"pith_short_8","alias_value":"KXM64JPO","created_at":"2026-07-05T10:07:29Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:KXM64JPOD2UEMV2JJ5SMXLEXYS","target":"record","payload":{"canonical_record":{"source":{"id":"2412.19874","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2024-12-27T17:17:16Z","cross_cats_sorted":["nucl-ex"],"title_canon_sha256":"bb1915d47f74c6b443084573c9a4014895fefe758ac8cf6ce0bb97eb9814faaf","abstract_canon_sha256":"61b3c218b7738006646e809200b2ce9fb51484cadfdf0665890af3f4041ff985"},"schema_version":"1.0"},"canonical_sha256":"55d9ee25ee1ea84657494f64cbac97c4ad8e95a30ffbc7ccebb503e7cb7049da","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:07:29.206307Z","signature_b64":"eXWz21zKv1BJ+hPZW/fO5cQc5/6I0Xer2r/WbdTtrHhgcXfsUeXCHrtzPtiDcufuP5QSAR4TUanRuOLWWNbcBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"55d9ee25ee1ea84657494f64cbac97c4ad8e95a30ffbc7ccebb503e7cb7049da","last_reissued_at":"2026-07-05T10:07:29.205812Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:07:29.205812Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2412.19874","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":"2026-07-05T10:07:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Y1R/YJpID5JPTvWAsjo3Ucb4xElC/GfqF8/Xp94bBThS3pH6yU0Wz2tX83RGq99r8sn8rwjQFMK1ka/UhZNIDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T10:18:00.766692Z"},"content_sha256":"562c96b4431c7d808c98d4efbffdd42cd35be47dcd5e4f2a7eb7b608cdac10b9","schema_version":"1.0","event_id":"sha256:562c96b4431c7d808c98d4efbffdd42cd35be47dcd5e4f2a7eb7b608cdac10b9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:KXM64JPOD2UEMV2JJ5SMXLEXYS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Felsenkeller shallow-underground laboratory for nuclear astrophysics","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-ex"],"primary_cat":"physics.ins-det","authors_text":"Anup Yadav, Ariel Tarife\\~no-Saldivia, Axel Boeltzig, Bruno Poser, Daniel Bemmerer, Eliana Masha, Jos\\'e Luis Ta\\'in, Kai Zuber, Katharina Gudat, Konrad Schmidt, Marcel Grieger, Max Osswald, Simon R\\\"ummler, Steffen Turkat, Thomas Hensel","submitted_at":"2024-12-27T17:17:16Z","abstract_excerpt":"In the Felsenkeller shallow-underground site, protected from cosmic muons by a 45 m thick rock overburden, a research laboratory including a 5 MV Pelletron ion accelerator and a number of radioactivity-measurement setups is located. The laboratory and its installations are described in detail. The background radiation has been studied, finding suppression factors of 40 for cosmic-ray muons, 200 for ambient neutrons, and 100 for the background in germanium $\\gamma$-ray detectors. Using an additional active muon veto, typically the background is just twice as high as in very deep underground lab"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2412.19874","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/2412.19874/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":"2026-07-05T10:07:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"C/eN6rSiaZPmW7KQTQyUiQ9IJyrrxQPVPwupJyCzKy4XHiLI/XvWQWYkUGC9NaQ9JqQKG9SXlJtzKYdwkuZUBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T10:18:00.767105Z"},"content_sha256":"c3791aeab1cf027198d19e7f36406c630264ac820d8e5797ffff01bec78dfe05","schema_version":"1.0","event_id":"sha256:c3791aeab1cf027198d19e7f36406c630264ac820d8e5797ffff01bec78dfe05"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KXM64JPOD2UEMV2JJ5SMXLEXYS/bundle.json","state_url":"https://pith.science/pith/KXM64JPOD2UEMV2JJ5SMXLEXYS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KXM64JPOD2UEMV2JJ5SMXLEXYS/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":"2026-08-04T10:18:00Z","links":{"resolver":"https://pith.science/pith/KXM64JPOD2UEMV2JJ5SMXLEXYS","bundle":"https://pith.science/pith/KXM64JPOD2UEMV2JJ5SMXLEXYS/bundle.json","state":"https://pith.science/pith/KXM64JPOD2UEMV2JJ5SMXLEXYS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KXM64JPOD2UEMV2JJ5SMXLEXYS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:KXM64JPOD2UEMV2JJ5SMXLEXYS","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":"61b3c218b7738006646e809200b2ce9fb51484cadfdf0665890af3f4041ff985","cross_cats_sorted":["nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2024-12-27T17:17:16Z","title_canon_sha256":"bb1915d47f74c6b443084573c9a4014895fefe758ac8cf6ce0bb97eb9814faaf"},"schema_version":"1.0","source":{"id":"2412.19874","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2412.19874","created_at":"2026-07-05T10:07:29Z"},{"alias_kind":"arxiv_version","alias_value":"2412.19874v1","created_at":"2026-07-05T10:07:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2412.19874","created_at":"2026-07-05T10:07:29Z"},{"alias_kind":"pith_short_12","alias_value":"KXM64JPOD2UE","created_at":"2026-07-05T10:07:29Z"},{"alias_kind":"pith_short_16","alias_value":"KXM64JPOD2UEMV2J","created_at":"2026-07-05T10:07:29Z"},{"alias_kind":"pith_short_8","alias_value":"KXM64JPO","created_at":"2026-07-05T10:07:29Z"}],"graph_snapshots":[{"event_id":"sha256:c3791aeab1cf027198d19e7f36406c630264ac820d8e5797ffff01bec78dfe05","target":"graph","created_at":"2026-07-05T10:07:29Z","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/2412.19874/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In the Felsenkeller shallow-underground site, protected from cosmic muons by a 45 m thick rock overburden, a research laboratory including a 5 MV Pelletron ion accelerator and a number of radioactivity-measurement setups is located. The laboratory and its installations are described in detail. The background radiation has been studied, finding suppression factors of 40 for cosmic-ray muons, 200 for ambient neutrons, and 100 for the background in germanium $\\gamma$-ray detectors. Using an additional active muon veto, typically the background is just twice as high as in very deep underground lab","authors_text":"Anup Yadav, Ariel Tarife\\~no-Saldivia, Axel Boeltzig, Bruno Poser, Daniel Bemmerer, Eliana Masha, Jos\\'e Luis Ta\\'in, Kai Zuber, Katharina Gudat, Konrad Schmidt, Marcel Grieger, Max Osswald, Simon R\\\"ummler, Steffen Turkat, Thomas Hensel","cross_cats":["nucl-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2024-12-27T17:17:16Z","title":"The Felsenkeller shallow-underground laboratory for nuclear astrophysics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2412.19874","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":"sha256:562c96b4431c7d808c98d4efbffdd42cd35be47dcd5e4f2a7eb7b608cdac10b9","target":"record","created_at":"2026-07-05T10:07:29Z","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":"61b3c218b7738006646e809200b2ce9fb51484cadfdf0665890af3f4041ff985","cross_cats_sorted":["nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2024-12-27T17:17:16Z","title_canon_sha256":"bb1915d47f74c6b443084573c9a4014895fefe758ac8cf6ce0bb97eb9814faaf"},"schema_version":"1.0","source":{"id":"2412.19874","kind":"arxiv","version":1}},"canonical_sha256":"55d9ee25ee1ea84657494f64cbac97c4ad8e95a30ffbc7ccebb503e7cb7049da","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"55d9ee25ee1ea84657494f64cbac97c4ad8e95a30ffbc7ccebb503e7cb7049da","first_computed_at":"2026-07-05T10:07:29.205812Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:07:29.205812Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eXWz21zKv1BJ+hPZW/fO5cQc5/6I0Xer2r/WbdTtrHhgcXfsUeXCHrtzPtiDcufuP5QSAR4TUanRuOLWWNbcBQ==","signature_status":"signed_v1","signed_at":"2026-07-05T10:07:29.206307Z","signed_message":"canonical_sha256_bytes"},"source_id":"2412.19874","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:562c96b4431c7d808c98d4efbffdd42cd35be47dcd5e4f2a7eb7b608cdac10b9","sha256:c3791aeab1cf027198d19e7f36406c630264ac820d8e5797ffff01bec78dfe05"],"state_sha256":"2a241619846b33c6a789239b240c19cf39fe89ae58e49e6eea66cdadc5f0f6b8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SO2UVKcopZj6vLnI4zFlEUSKPDWLm2YqD067H+Ie8O34L4SL26tTO+DeuiNkNXAy5kl/vvQfNA9q0jHls7y/Dg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T10:18:00.769911Z","bundle_sha256":"95a4df9b059004cec232cb055ae07fd75e3d4b5f28af7c71eba2aac8ef77ad91"}}