{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:73WMURLUDXRGVRIOUZG5SX5LUG","short_pith_number":"pith:73WMURLU","canonical_record":{"source":{"id":"1311.7043","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-11-27T17:10:51Z","cross_cats_sorted":["nucl-ex"],"title_canon_sha256":"378fc30c83de34b42ba77f5d5c4dc52839ff738f9c96cbf97c55a826cac2eaad","abstract_canon_sha256":"ca70052c122e1b81fc2aa93117442077572a8c8903d2f7beb92c386dbec40cb4"},"schema_version":"1.0"},"canonical_sha256":"feecca45741de26ac50ea64dd95faba1adf28ebc23a3ada8c9dc9e6c62ab0f4c","source":{"kind":"arxiv","id":"1311.7043","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1311.7043","created_at":"2026-05-18T02:52:04Z"},{"alias_kind":"arxiv_version","alias_value":"1311.7043v2","created_at":"2026-05-18T02:52:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1311.7043","created_at":"2026-05-18T02:52:04Z"},{"alias_kind":"pith_short_12","alias_value":"73WMURLUDXRG","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_16","alias_value":"73WMURLUDXRGVRIO","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_8","alias_value":"73WMURLU","created_at":"2026-05-18T12:27:36Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:73WMURLUDXRGVRIOUZG5SX5LUG","target":"record","payload":{"canonical_record":{"source":{"id":"1311.7043","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-11-27T17:10:51Z","cross_cats_sorted":["nucl-ex"],"title_canon_sha256":"378fc30c83de34b42ba77f5d5c4dc52839ff738f9c96cbf97c55a826cac2eaad","abstract_canon_sha256":"ca70052c122e1b81fc2aa93117442077572a8c8903d2f7beb92c386dbec40cb4"},"schema_version":"1.0"},"canonical_sha256":"feecca45741de26ac50ea64dd95faba1adf28ebc23a3ada8c9dc9e6c62ab0f4c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:52:04.013357Z","signature_b64":"2paW7NfBM4G98/UMFshK6HArUjEyt5Ev2z0et2gPYeK49+K6obgaRrROtv6F2C0WQDerOpPjlLDn6pRlkvutDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"feecca45741de26ac50ea64dd95faba1adf28ebc23a3ada8c9dc9e6c62ab0f4c","last_reissued_at":"2026-05-18T02:52:04.012797Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:52:04.012797Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1311.7043","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":"2026-05-18T02:52:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tyYjfxJbYDYZZH7iti+XBcWrJjfOKDWy6HJW094OHi6s62pfpqJswJPRB4RQtDltuHfC5dK4oWDsqUQttXrQAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T18:39:46.764491Z"},"content_sha256":"d16a0f0f2db0885e91eb535d243cb91d7c1d9189f5cda8e2be6e5c9f05254b91","schema_version":"1.0","event_id":"sha256:d16a0f0f2db0885e91eb535d243cb91d7c1d9189f5cda8e2be6e5c9f05254b91"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:73WMURLUDXRGVRIOUZG5SX5LUG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Search for time modulations in the decay rate of 40K and 232Th","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-ex"],"primary_cat":"astro-ph.SR","authors_text":"C. Broggini, E. Bellotti, G. Di Carlo, M. Laubenstein, M. Pietroni, R. Menegazzo","submitted_at":"2013-11-27T17:10:51Z","abstract_excerpt":"Time modulations at per mil level have been reported to take place in the decay constant of about 15 nuclei with period of one year (most cases) but also of about one month or one day. In this paper we give the results of the activity measurement of a 40K source and a 232Th one. The two experiments have been done at the Gran Sasso Laboratory during a period of about 500 days, above ground (40K) and underground (232Th) with a target sensitivity of a few parts over 10^5. We also give the results of the activity measurement at the time of the X-class solar flares which took place in May 2013. Bri"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1311.7043","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":"2026-05-18T02:52:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BC7ri+EFbPinviaUvv8WUxbL7i9sH4LPPprcEjiG5WwZByD2nYnAzUPHrRlUAKnLl1omzlBT2DGFv9vqOaC5AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T18:39:46.765237Z"},"content_sha256":"16d1d764f601a6c81f1efeec052d194ff5af2ad501e66401558ee80e98be0c36","schema_version":"1.0","event_id":"sha256:16d1d764f601a6c81f1efeec052d194ff5af2ad501e66401558ee80e98be0c36"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/73WMURLUDXRGVRIOUZG5SX5LUG/bundle.json","state_url":"https://pith.science/pith/73WMURLUDXRGVRIOUZG5SX5LUG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/73WMURLUDXRGVRIOUZG5SX5LUG/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":"2026-05-25T18:39:46Z","links":{"resolver":"https://pith.science/pith/73WMURLUDXRGVRIOUZG5SX5LUG","bundle":"https://pith.science/pith/73WMURLUDXRGVRIOUZG5SX5LUG/bundle.json","state":"https://pith.science/pith/73WMURLUDXRGVRIOUZG5SX5LUG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/73WMURLUDXRGVRIOUZG5SX5LUG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:73WMURLUDXRGVRIOUZG5SX5LUG","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":"ca70052c122e1b81fc2aa93117442077572a8c8903d2f7beb92c386dbec40cb4","cross_cats_sorted":["nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-11-27T17:10:51Z","title_canon_sha256":"378fc30c83de34b42ba77f5d5c4dc52839ff738f9c96cbf97c55a826cac2eaad"},"schema_version":"1.0","source":{"id":"1311.7043","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1311.7043","created_at":"2026-05-18T02:52:04Z"},{"alias_kind":"arxiv_version","alias_value":"1311.7043v2","created_at":"2026-05-18T02:52:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1311.7043","created_at":"2026-05-18T02:52:04Z"},{"alias_kind":"pith_short_12","alias_value":"73WMURLUDXRG","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_16","alias_value":"73WMURLUDXRGVRIO","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_8","alias_value":"73WMURLU","created_at":"2026-05-18T12:27:36Z"}],"graph_snapshots":[{"event_id":"sha256:16d1d764f601a6c81f1efeec052d194ff5af2ad501e66401558ee80e98be0c36","target":"graph","created_at":"2026-05-18T02:52:04Z","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"},"paper":{"abstract_excerpt":"Time modulations at per mil level have been reported to take place in the decay constant of about 15 nuclei with period of one year (most cases) but also of about one month or one day. In this paper we give the results of the activity measurement of a 40K source and a 232Th one. The two experiments have been done at the Gran Sasso Laboratory during a period of about 500 days, above ground (40K) and underground (232Th) with a target sensitivity of a few parts over 10^5. We also give the results of the activity measurement at the time of the X-class solar flares which took place in May 2013. Bri","authors_text":"C. Broggini, E. Bellotti, G. Di Carlo, M. Laubenstein, M. Pietroni, R. Menegazzo","cross_cats":["nucl-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-11-27T17:10:51Z","title":"Search for time modulations in the decay rate of 40K and 232Th"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1311.7043","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:d16a0f0f2db0885e91eb535d243cb91d7c1d9189f5cda8e2be6e5c9f05254b91","target":"record","created_at":"2026-05-18T02:52:04Z","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":"ca70052c122e1b81fc2aa93117442077572a8c8903d2f7beb92c386dbec40cb4","cross_cats_sorted":["nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-11-27T17:10:51Z","title_canon_sha256":"378fc30c83de34b42ba77f5d5c4dc52839ff738f9c96cbf97c55a826cac2eaad"},"schema_version":"1.0","source":{"id":"1311.7043","kind":"arxiv","version":2}},"canonical_sha256":"feecca45741de26ac50ea64dd95faba1adf28ebc23a3ada8c9dc9e6c62ab0f4c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"feecca45741de26ac50ea64dd95faba1adf28ebc23a3ada8c9dc9e6c62ab0f4c","first_computed_at":"2026-05-18T02:52:04.012797Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:52:04.012797Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2paW7NfBM4G98/UMFshK6HArUjEyt5Ev2z0et2gPYeK49+K6obgaRrROtv6F2C0WQDerOpPjlLDn6pRlkvutDg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:52:04.013357Z","signed_message":"canonical_sha256_bytes"},"source_id":"1311.7043","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d16a0f0f2db0885e91eb535d243cb91d7c1d9189f5cda8e2be6e5c9f05254b91","sha256:16d1d764f601a6c81f1efeec052d194ff5af2ad501e66401558ee80e98be0c36"],"state_sha256":"9424a8452f277d17b03ee7e2437c5f8e5ac85f3439807060dfe8924788bc1848"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4CwWytTWjeLa7seSDgjJ5O5JS0vFNOQj7esJTXx8RxR+yJz6c9wUNFry1ApTuU7iGarMCgRMZ10yWivbOIXkDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T18:39:46.769305Z","bundle_sha256":"34db0c8301bdf47572b636dfe82a75c8607a3993c875a6cc5acf4365dacdc4cc"}}