{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:GIKO4OYFYJHS7MFPS2D2CM3FUQ","short_pith_number":"pith:GIKO4OYF","canonical_record":{"source":{"id":"0801.1874","kind":"arxiv","version":3},"metadata":{"license":"","primary_cat":"physics.atom-ph","submitted_at":"2008-01-12T02:25:21Z","cross_cats_sorted":["physics.gen-ph"],"title_canon_sha256":"a9ef9a60c0e089a1ad58d09c3e74642c9b3c2c1eb1a2ec3cffeb196918e38909","abstract_canon_sha256":"9615cb72a8494aac5b8db873bdf8b352e4e9118acff2e917bbb5c7acb773a840"},"schema_version":"1.0"},"canonical_sha256":"3214ee3b05c24f2fb0af9687a13365a40553890efe498e84c47ec9caf8238a23","source":{"kind":"arxiv","id":"0801.1874","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0801.1874","created_at":"2026-07-04T15:23:51Z"},{"alias_kind":"arxiv_version","alias_value":"0801.1874v3","created_at":"2026-07-04T15:23:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0801.1874","created_at":"2026-07-04T15:23:51Z"},{"alias_kind":"pith_short_12","alias_value":"GIKO4OYFYJHS","created_at":"2026-07-04T15:23:51Z"},{"alias_kind":"pith_short_16","alias_value":"GIKO4OYFYJHS7MFP","created_at":"2026-07-04T15:23:51Z"},{"alias_kind":"pith_short_8","alias_value":"GIKO4OYF","created_at":"2026-07-04T15:23:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:GIKO4OYFYJHS7MFPS2D2CM3FUQ","target":"record","payload":{"canonical_record":{"source":{"id":"0801.1874","kind":"arxiv","version":3},"metadata":{"license":"","primary_cat":"physics.atom-ph","submitted_at":"2008-01-12T02:25:21Z","cross_cats_sorted":["physics.gen-ph"],"title_canon_sha256":"a9ef9a60c0e089a1ad58d09c3e74642c9b3c2c1eb1a2ec3cffeb196918e38909","abstract_canon_sha256":"9615cb72a8494aac5b8db873bdf8b352e4e9118acff2e917bbb5c7acb773a840"},"schema_version":"1.0"},"canonical_sha256":"3214ee3b05c24f2fb0af9687a13365a40553890efe498e84c47ec9caf8238a23","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:23:51.525661Z","signature_b64":"c2SltgEdDL6l4Lre0qvt8IdQqgqBuTCd3AW7BWz31WOeGdy6/vYAY9yllUf+9j76D770HvA5yEaVY0zms6GPDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3214ee3b05c24f2fb0af9687a13365a40553890efe498e84c47ec9caf8238a23","last_reissued_at":"2026-07-04T15:23:51.525258Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:23:51.525258Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0801.1874","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T15:23:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lnWzRNlG5gEJjY6tMktOlCXw6m5Ve2zVX8Ir7GWkRaYa3g6OG6ZlqbmzDbTaH38m+6yMo6D/A9E2kp7sFhszAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-13T10:56:03.618009Z"},"content_sha256":"9eb1f0d35f6738622d4eb6e10bb3dbdbe9c8070c010dab11d958947caf60730d","schema_version":"1.0","event_id":"sha256:9eb1f0d35f6738622d4eb6e10bb3dbdbe9c8070c010dab11d958947caf60730d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:GIKO4OYFYJHS7MFPS2D2CM3FUQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"New Limits on Coupling of Fundamental Constants to Gravity Using $^{87}$Sr Optical Lattice Clocks","license":"","headline":"","cross_cats":["physics.gen-ph"],"primary_cat":"physics.atom-ph","authors_text":"A. Brusch, A. D. Ludlow, F.-L. Hong, G. K. Campbell, H. Katori, J. W. Thomsen, J. Ye, M. Fouch\\'e, M. M. Boyd, M. Takamoto, P. Lemonde, R. Le Targat, S. Blatt, T. Zelevinsky, V. V. Flambaum, X. Baillard","submitted_at":"2008-01-12T02:25:21Z","abstract_excerpt":"The $^1\\mathrm{S}_0$-$^3\\mathrm{P}_0$ clock transition frequency $\\nu_\\text{Sr}$ in neutral $^{87}$Sr has been measured relative to the Cs standard by three independent laboratories in Boulder, Paris, and Tokyo over the last three years. The agreement on the $1\\times 10^{-15}$ level makes $\\nu_\\text{Sr}$ the best agreed-upon optical atomic frequency. We combine periodic variations in the $^{87}$Sr clock frequency with $^{199}$Hg$^+$ and H-maser data to test Local Position Invariance by obtaining the strongest limits to date on gravitational-coupling coefficients for the fine-structure constant"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0801.1874","kind":"arxiv","version":3},"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/0801.1874/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":"2026-07-04T15:23:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ktrPHBpGA2fyRm8xULqE/cb48R9XBPekQkt9xpFBinKCs5KZcr0FDvsmbEf4D+l5UKMPs6r7rjsv2jgspoAFAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-13T10:56:03.618396Z"},"content_sha256":"6854c737aa46bd2e43a70c781b46e5a29b03e88e8abc0c462ad0323506388763","schema_version":"1.0","event_id":"sha256:6854c737aa46bd2e43a70c781b46e5a29b03e88e8abc0c462ad0323506388763"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GIKO4OYFYJHS7MFPS2D2CM3FUQ/bundle.json","state_url":"https://pith.science/pith/GIKO4OYFYJHS7MFPS2D2CM3FUQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GIKO4OYFYJHS7MFPS2D2CM3FUQ/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":"2026-07-13T10:56:03Z","links":{"resolver":"https://pith.science/pith/GIKO4OYFYJHS7MFPS2D2CM3FUQ","bundle":"https://pith.science/pith/GIKO4OYFYJHS7MFPS2D2CM3FUQ/bundle.json","state":"https://pith.science/pith/GIKO4OYFYJHS7MFPS2D2CM3FUQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GIKO4OYFYJHS7MFPS2D2CM3FUQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:GIKO4OYFYJHS7MFPS2D2CM3FUQ","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":"9615cb72a8494aac5b8db873bdf8b352e4e9118acff2e917bbb5c7acb773a840","cross_cats_sorted":["physics.gen-ph"],"license":"","primary_cat":"physics.atom-ph","submitted_at":"2008-01-12T02:25:21Z","title_canon_sha256":"a9ef9a60c0e089a1ad58d09c3e74642c9b3c2c1eb1a2ec3cffeb196918e38909"},"schema_version":"1.0","source":{"id":"0801.1874","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0801.1874","created_at":"2026-07-04T15:23:51Z"},{"alias_kind":"arxiv_version","alias_value":"0801.1874v3","created_at":"2026-07-04T15:23:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0801.1874","created_at":"2026-07-04T15:23:51Z"},{"alias_kind":"pith_short_12","alias_value":"GIKO4OYFYJHS","created_at":"2026-07-04T15:23:51Z"},{"alias_kind":"pith_short_16","alias_value":"GIKO4OYFYJHS7MFP","created_at":"2026-07-04T15:23:51Z"},{"alias_kind":"pith_short_8","alias_value":"GIKO4OYF","created_at":"2026-07-04T15:23:51Z"}],"graph_snapshots":[{"event_id":"sha256:6854c737aa46bd2e43a70c781b46e5a29b03e88e8abc0c462ad0323506388763","target":"graph","created_at":"2026-07-04T15:23:51Z","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/0801.1874/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The $^1\\mathrm{S}_0$-$^3\\mathrm{P}_0$ clock transition frequency $\\nu_\\text{Sr}$ in neutral $^{87}$Sr has been measured relative to the Cs standard by three independent laboratories in Boulder, Paris, and Tokyo over the last three years. The agreement on the $1\\times 10^{-15}$ level makes $\\nu_\\text{Sr}$ the best agreed-upon optical atomic frequency. We combine periodic variations in the $^{87}$Sr clock frequency with $^{199}$Hg$^+$ and H-maser data to test Local Position Invariance by obtaining the strongest limits to date on gravitational-coupling coefficients for the fine-structure constant","authors_text":"A. Brusch, A. D. Ludlow, F.-L. Hong, G. K. Campbell, H. Katori, J. W. Thomsen, J. Ye, M. Fouch\\'e, M. M. Boyd, M. Takamoto, P. Lemonde, R. Le Targat, S. Blatt, T. Zelevinsky, V. V. Flambaum, X. Baillard","cross_cats":["physics.gen-ph"],"headline":"","license":"","primary_cat":"physics.atom-ph","submitted_at":"2008-01-12T02:25:21Z","title":"New Limits on Coupling of Fundamental Constants to Gravity Using $^{87}$Sr Optical Lattice Clocks"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0801.1874","kind":"arxiv","version":3},"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":"sha256:9eb1f0d35f6738622d4eb6e10bb3dbdbe9c8070c010dab11d958947caf60730d","target":"record","created_at":"2026-07-04T15:23:51Z","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":"9615cb72a8494aac5b8db873bdf8b352e4e9118acff2e917bbb5c7acb773a840","cross_cats_sorted":["physics.gen-ph"],"license":"","primary_cat":"physics.atom-ph","submitted_at":"2008-01-12T02:25:21Z","title_canon_sha256":"a9ef9a60c0e089a1ad58d09c3e74642c9b3c2c1eb1a2ec3cffeb196918e38909"},"schema_version":"1.0","source":{"id":"0801.1874","kind":"arxiv","version":3}},"canonical_sha256":"3214ee3b05c24f2fb0af9687a13365a40553890efe498e84c47ec9caf8238a23","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3214ee3b05c24f2fb0af9687a13365a40553890efe498e84c47ec9caf8238a23","first_computed_at":"2026-07-04T15:23:51.525258Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:23:51.525258Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"c2SltgEdDL6l4Lre0qvt8IdQqgqBuTCd3AW7BWz31WOeGdy6/vYAY9yllUf+9j76D770HvA5yEaVY0zms6GPDA==","signature_status":"signed_v1","signed_at":"2026-07-04T15:23:51.525661Z","signed_message":"canonical_sha256_bytes"},"source_id":"0801.1874","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9eb1f0d35f6738622d4eb6e10bb3dbdbe9c8070c010dab11d958947caf60730d","sha256:6854c737aa46bd2e43a70c781b46e5a29b03e88e8abc0c462ad0323506388763"],"state_sha256":"488c1b6fe34a937a01e3a5b1dbc1765fbe9adf4c7740b66a9b16bf668191779e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6r6j8A3NDt/0I1Gt+TnKH//uIMxp8FBiuArAQazCEPN5CMjI2gQ0MUM8iGjN/eezdqlmGupnEDatMVYE+9k5Dg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-13T10:56:03.620394Z","bundle_sha256":"6035d0a2d21086d09bb33b8e1ef808bfa4eb3d05da73a3e5685e9381815de42a"}}