{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:GACRTAZCJZUHYEXFYZRRIQOKL6","short_pith_number":"pith:GACRTAZC","canonical_record":{"source":{"id":"2406.06806","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.atom-ph","submitted_at":"2024-06-10T21:20:36Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"13fef28fffb17837794b77b9b6ebbc3c5e112356daa1583b65c4ff48fc6c32d3","abstract_canon_sha256":"b5f662f1248b5de8d074257cb41ed6b8eb82ab6a625d138ef1a373bb0b73ccf3"},"schema_version":"1.0"},"canonical_sha256":"30051983224e687c12e5c6631441ca5fbda098318b2e1c253da6714cecf1f504","source":{"kind":"arxiv","id":"2406.06806","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2406.06806","created_at":"2026-07-05T08:29:50Z"},{"alias_kind":"arxiv_version","alias_value":"2406.06806v1","created_at":"2026-07-05T08:29:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2406.06806","created_at":"2026-07-05T08:29:50Z"},{"alias_kind":"pith_short_12","alias_value":"GACRTAZCJZUH","created_at":"2026-07-05T08:29:50Z"},{"alias_kind":"pith_short_16","alias_value":"GACRTAZCJZUHYEXF","created_at":"2026-07-05T08:29:50Z"},{"alias_kind":"pith_short_8","alias_value":"GACRTAZC","created_at":"2026-07-05T08:29:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:GACRTAZCJZUHYEXFYZRRIQOKL6","target":"record","payload":{"canonical_record":{"source":{"id":"2406.06806","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.atom-ph","submitted_at":"2024-06-10T21:20:36Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"13fef28fffb17837794b77b9b6ebbc3c5e112356daa1583b65c4ff48fc6c32d3","abstract_canon_sha256":"b5f662f1248b5de8d074257cb41ed6b8eb82ab6a625d138ef1a373bb0b73ccf3"},"schema_version":"1.0"},"canonical_sha256":"30051983224e687c12e5c6631441ca5fbda098318b2e1c253da6714cecf1f504","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T08:29:50.286508Z","signature_b64":"rbBVgC3EkcRcCOZdVHlyByoERPwVtzDUXni01WSCDDvjvV+M7c16t4xv8zgMvRafTSoZE4S7sy8Mh0+QOiPaCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"30051983224e687c12e5c6631441ca5fbda098318b2e1c253da6714cecf1f504","last_reissued_at":"2026-07-05T08:29:50.285802Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T08:29:50.285802Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2406.06806","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":"2026-07-05T08:29:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wWcldLlC038rv2IyBYBOR463YwWNGNGRtcaHtbloqJ54KX8haLI9etrXoaukxWf3jk7PyzsiBtneuTGFhaAwCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T21:26:02.603240Z"},"content_sha256":"202015d90c179d75a1042ad66a255f1456930ef8f01995f8cd98d47509995a2e","schema_version":"1.0","event_id":"sha256:202015d90c179d75a1042ad66a255f1456930ef8f01995f8cd98d47509995a2e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:GACRTAZCJZUHYEXFYZRRIQOKL6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Isotope shift measurement of the 423-nm transition in neutral Ca","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["quant-ph"],"primary_cat":"physics.atom-ph","authors_text":"David R\\\"oser, Hans Ke{\\ss}ler, Lukas M\\\"oller, Simon Stellmer","submitted_at":"2024-06-10T21:20:36Z","abstract_excerpt":"We report on saturated absorption spectroscopy measurements of the $(4s^2) ^{1}S_0\\rightarrow(4s4p) ^{1}P_1$ transition for the four most abundant even-mass isotopes in calcium. By referencing the laser locked to an ultralow expansion cavity and carefully investigating systematic errors, isotope shifts are determined with a precision below 100 kHz, improving previously reported values by a factor of about five. A King plot analysis employing literature values of the 729-nm transition in Ca ions shows excellent linearity. The field and mass shift parameters are determined from King plots with o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2406.06806","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/2406.06806/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":"2026-07-05T08:29:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5HTzBHnwJePpSH4qm10COdN0GAq+Iwx5okHC4XQhcSEWs5FQz2pTN97oV+Hyx4GyiCA2hIAiqczZum1YUqBNDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T21:26:02.604151Z"},"content_sha256":"025fc78aad0548ea9c2bfb365a8bd815340c4949d3fd98e8e5f061c0a28686a2","schema_version":"1.0","event_id":"sha256:025fc78aad0548ea9c2bfb365a8bd815340c4949d3fd98e8e5f061c0a28686a2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GACRTAZCJZUHYEXFYZRRIQOKL6/bundle.json","state_url":"https://pith.science/pith/GACRTAZCJZUHYEXFYZRRIQOKL6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GACRTAZCJZUHYEXFYZRRIQOKL6/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":"2026-08-09T21:26:02Z","links":{"resolver":"https://pith.science/pith/GACRTAZCJZUHYEXFYZRRIQOKL6","bundle":"https://pith.science/pith/GACRTAZCJZUHYEXFYZRRIQOKL6/bundle.json","state":"https://pith.science/pith/GACRTAZCJZUHYEXFYZRRIQOKL6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GACRTAZCJZUHYEXFYZRRIQOKL6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:GACRTAZCJZUHYEXFYZRRIQOKL6","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":"b5f662f1248b5de8d074257cb41ed6b8eb82ab6a625d138ef1a373bb0b73ccf3","cross_cats_sorted":["quant-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.atom-ph","submitted_at":"2024-06-10T21:20:36Z","title_canon_sha256":"13fef28fffb17837794b77b9b6ebbc3c5e112356daa1583b65c4ff48fc6c32d3"},"schema_version":"1.0","source":{"id":"2406.06806","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2406.06806","created_at":"2026-07-05T08:29:50Z"},{"alias_kind":"arxiv_version","alias_value":"2406.06806v1","created_at":"2026-07-05T08:29:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2406.06806","created_at":"2026-07-05T08:29:50Z"},{"alias_kind":"pith_short_12","alias_value":"GACRTAZCJZUH","created_at":"2026-07-05T08:29:50Z"},{"alias_kind":"pith_short_16","alias_value":"GACRTAZCJZUHYEXF","created_at":"2026-07-05T08:29:50Z"},{"alias_kind":"pith_short_8","alias_value":"GACRTAZC","created_at":"2026-07-05T08:29:50Z"}],"graph_snapshots":[{"event_id":"sha256:025fc78aad0548ea9c2bfb365a8bd815340c4949d3fd98e8e5f061c0a28686a2","target":"graph","created_at":"2026-07-05T08:29:50Z","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/2406.06806/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We report on saturated absorption spectroscopy measurements of the $(4s^2) ^{1}S_0\\rightarrow(4s4p) ^{1}P_1$ transition for the four most abundant even-mass isotopes in calcium. By referencing the laser locked to an ultralow expansion cavity and carefully investigating systematic errors, isotope shifts are determined with a precision below 100 kHz, improving previously reported values by a factor of about five. A King plot analysis employing literature values of the 729-nm transition in Ca ions shows excellent linearity. The field and mass shift parameters are determined from King plots with o","authors_text":"David R\\\"oser, Hans Ke{\\ss}ler, Lukas M\\\"oller, Simon Stellmer","cross_cats":["quant-ph"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.atom-ph","submitted_at":"2024-06-10T21:20:36Z","title":"Isotope shift measurement of the 423-nm transition in neutral Ca"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2406.06806","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":"sha256:202015d90c179d75a1042ad66a255f1456930ef8f01995f8cd98d47509995a2e","target":"record","created_at":"2026-07-05T08:29:50Z","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":"b5f662f1248b5de8d074257cb41ed6b8eb82ab6a625d138ef1a373bb0b73ccf3","cross_cats_sorted":["quant-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.atom-ph","submitted_at":"2024-06-10T21:20:36Z","title_canon_sha256":"13fef28fffb17837794b77b9b6ebbc3c5e112356daa1583b65c4ff48fc6c32d3"},"schema_version":"1.0","source":{"id":"2406.06806","kind":"arxiv","version":1}},"canonical_sha256":"30051983224e687c12e5c6631441ca5fbda098318b2e1c253da6714cecf1f504","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"30051983224e687c12e5c6631441ca5fbda098318b2e1c253da6714cecf1f504","first_computed_at":"2026-07-05T08:29:50.285802Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T08:29:50.285802Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rbBVgC3EkcRcCOZdVHlyByoERPwVtzDUXni01WSCDDvjvV+M7c16t4xv8zgMvRafTSoZE4S7sy8Mh0+QOiPaCQ==","signature_status":"signed_v1","signed_at":"2026-07-05T08:29:50.286508Z","signed_message":"canonical_sha256_bytes"},"source_id":"2406.06806","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:202015d90c179d75a1042ad66a255f1456930ef8f01995f8cd98d47509995a2e","sha256:025fc78aad0548ea9c2bfb365a8bd815340c4949d3fd98e8e5f061c0a28686a2"],"state_sha256":"4224bd94b39c90a6157d884b150fdae793d874384c0b6e5f806794497e028c65"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/zA2q1+6uSRsWjBuxBGoPk8avQAfF10XIQam2z8X7XXWqJy4/fDi3gFPROsOoZCk3gd5vZbV0YTWwp9J37oiCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-09T21:26:02.609711Z","bundle_sha256":"787921c178247841acca5b1d5211c21f2ea6721dc34d6c0e34ae30e837849240"}}