{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:HHTR2PPQKNNQTPG4AH7STNJ5X6","short_pith_number":"pith:HHTR2PPQ","canonical_record":{"source":{"id":"1111.4521","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2011-11-19T00:35:34Z","cross_cats_sorted":["physics.data-an"],"title_canon_sha256":"6816a167f37e562affb703563a465b44a1ca7ea9908d37d71c287c80ebae5813","abstract_canon_sha256":"89dc7a979ae925fc6f67294581172b46130e5121314228b9a11ab31812114814"},"schema_version":"1.0"},"canonical_sha256":"39e71d3df0535b09bcdc01ff29b53dbfb317af301e13a26420b6df79e35c40c1","source":{"kind":"arxiv","id":"1111.4521","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1111.4521","created_at":"2026-05-18T01:59:29Z"},{"alias_kind":"arxiv_version","alias_value":"1111.4521v1","created_at":"2026-05-18T01:59:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1111.4521","created_at":"2026-05-18T01:59:29Z"},{"alias_kind":"pith_short_12","alias_value":"HHTR2PPQKNNQ","created_at":"2026-05-18T12:26:30Z"},{"alias_kind":"pith_short_16","alias_value":"HHTR2PPQKNNQTPG4","created_at":"2026-05-18T12:26:30Z"},{"alias_kind":"pith_short_8","alias_value":"HHTR2PPQ","created_at":"2026-05-18T12:26:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:HHTR2PPQKNNQTPG4AH7STNJ5X6","target":"record","payload":{"canonical_record":{"source":{"id":"1111.4521","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2011-11-19T00:35:34Z","cross_cats_sorted":["physics.data-an"],"title_canon_sha256":"6816a167f37e562affb703563a465b44a1ca7ea9908d37d71c287c80ebae5813","abstract_canon_sha256":"89dc7a979ae925fc6f67294581172b46130e5121314228b9a11ab31812114814"},"schema_version":"1.0"},"canonical_sha256":"39e71d3df0535b09bcdc01ff29b53dbfb317af301e13a26420b6df79e35c40c1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:59:29.002177Z","signature_b64":"FqqcBb2gIzcrwhOy03Eh4yrbOe+HXAPk++tRFnUMSyg2FGe6PFoqmZarJuvrouS1aOHJrlFdrrexJDiOlXTjCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"39e71d3df0535b09bcdc01ff29b53dbfb317af301e13a26420b6df79e35c40c1","last_reissued_at":"2026-05-18T01:59:29.001677Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:59:29.001677Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1111.4521","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":"2026-05-18T01:59:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rqyyuWk0KZTIAOYXTz1XMsj+57eitZVTNJjYOitxkr3z1G7uxvUTseQOxyMHIGLMLw8D8DudTU+GQc6pYwH/AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T11:41:03.147218Z"},"content_sha256":"a3c179f75dd6d8860992019863e2e9f37f471a17ef3d03a22a8a35168ff82189","schema_version":"1.0","event_id":"sha256:a3c179f75dd6d8860992019863e2e9f37f471a17ef3d03a22a8a35168ff82189"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:HHTR2PPQKNNQTPG4AH7STNJ5X6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Nanohertz Frequency Determination for the Gravity Probe B HF SQUID Signal","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.data-an"],"primary_cat":"physics.ins-det","authors_text":"A. S. Silbergleit, D. I. Santiago, G. M. Keiser, J. E. Berberian, J. Kozaczuk, J. W. Conklin, M. Salomon, P. Worden","submitted_at":"2011-11-19T00:35:34Z","abstract_excerpt":"In this paper, we present a method to measure the frequency and the frequency change rate of a digital signal. This method consists of three consecutive algorithms: frequency interpolation, phase differencing, and a third algorithm specifically designed and tested by the authors. The succession of these three algorithms allowed a 5 parts in 10^10 resolution in frequency determination. The algorithm developed by the authors can be applied to a sampled scalar signal such that a model linking the harmonics of its main frequency to the underlying physical phenomenon is available. This method was d"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1111.4521","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":""},"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":"2026-05-18T01:59:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gPgv8kTUs8eTN3pmUyCdiQBtTLwDai9o7dhJx+JPqvGG/rYSQNaY9X07ARCSTa/+PRsLHY4kdDlGgwzCP/LPAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T11:41:03.147579Z"},"content_sha256":"a257ad46f2e101b1f0310760e5bbe445cf25f4b37e329bc937392d857c3de5d9","schema_version":"1.0","event_id":"sha256:a257ad46f2e101b1f0310760e5bbe445cf25f4b37e329bc937392d857c3de5d9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HHTR2PPQKNNQTPG4AH7STNJ5X6/bundle.json","state_url":"https://pith.science/pith/HHTR2PPQKNNQTPG4AH7STNJ5X6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HHTR2PPQKNNQTPG4AH7STNJ5X6/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":"2026-06-01T11:41:03Z","links":{"resolver":"https://pith.science/pith/HHTR2PPQKNNQTPG4AH7STNJ5X6","bundle":"https://pith.science/pith/HHTR2PPQKNNQTPG4AH7STNJ5X6/bundle.json","state":"https://pith.science/pith/HHTR2PPQKNNQTPG4AH7STNJ5X6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HHTR2PPQKNNQTPG4AH7STNJ5X6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:HHTR2PPQKNNQTPG4AH7STNJ5X6","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":"89dc7a979ae925fc6f67294581172b46130e5121314228b9a11ab31812114814","cross_cats_sorted":["physics.data-an"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2011-11-19T00:35:34Z","title_canon_sha256":"6816a167f37e562affb703563a465b44a1ca7ea9908d37d71c287c80ebae5813"},"schema_version":"1.0","source":{"id":"1111.4521","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1111.4521","created_at":"2026-05-18T01:59:29Z"},{"alias_kind":"arxiv_version","alias_value":"1111.4521v1","created_at":"2026-05-18T01:59:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1111.4521","created_at":"2026-05-18T01:59:29Z"},{"alias_kind":"pith_short_12","alias_value":"HHTR2PPQKNNQ","created_at":"2026-05-18T12:26:30Z"},{"alias_kind":"pith_short_16","alias_value":"HHTR2PPQKNNQTPG4","created_at":"2026-05-18T12:26:30Z"},{"alias_kind":"pith_short_8","alias_value":"HHTR2PPQ","created_at":"2026-05-18T12:26:30Z"}],"graph_snapshots":[{"event_id":"sha256:a257ad46f2e101b1f0310760e5bbe445cf25f4b37e329bc937392d857c3de5d9","target":"graph","created_at":"2026-05-18T01:59:29Z","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"},"paper":{"abstract_excerpt":"In this paper, we present a method to measure the frequency and the frequency change rate of a digital signal. This method consists of three consecutive algorithms: frequency interpolation, phase differencing, and a third algorithm specifically designed and tested by the authors. The succession of these three algorithms allowed a 5 parts in 10^10 resolution in frequency determination. The algorithm developed by the authors can be applied to a sampled scalar signal such that a model linking the harmonics of its main frequency to the underlying physical phenomenon is available. This method was d","authors_text":"A. S. Silbergleit, D. I. Santiago, G. M. Keiser, J. E. Berberian, J. Kozaczuk, J. W. Conklin, M. Salomon, P. Worden","cross_cats":["physics.data-an"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2011-11-19T00:35:34Z","title":"Nanohertz Frequency Determination for the Gravity Probe B HF SQUID Signal"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1111.4521","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:a3c179f75dd6d8860992019863e2e9f37f471a17ef3d03a22a8a35168ff82189","target":"record","created_at":"2026-05-18T01:59:29Z","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":"89dc7a979ae925fc6f67294581172b46130e5121314228b9a11ab31812114814","cross_cats_sorted":["physics.data-an"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2011-11-19T00:35:34Z","title_canon_sha256":"6816a167f37e562affb703563a465b44a1ca7ea9908d37d71c287c80ebae5813"},"schema_version":"1.0","source":{"id":"1111.4521","kind":"arxiv","version":1}},"canonical_sha256":"39e71d3df0535b09bcdc01ff29b53dbfb317af301e13a26420b6df79e35c40c1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"39e71d3df0535b09bcdc01ff29b53dbfb317af301e13a26420b6df79e35c40c1","first_computed_at":"2026-05-18T01:59:29.001677Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:59:29.001677Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"FqqcBb2gIzcrwhOy03Eh4yrbOe+HXAPk++tRFnUMSyg2FGe6PFoqmZarJuvrouS1aOHJrlFdrrexJDiOlXTjCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:59:29.002177Z","signed_message":"canonical_sha256_bytes"},"source_id":"1111.4521","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a3c179f75dd6d8860992019863e2e9f37f471a17ef3d03a22a8a35168ff82189","sha256:a257ad46f2e101b1f0310760e5bbe445cf25f4b37e329bc937392d857c3de5d9"],"state_sha256":"225365dd9c13d3640ec795d1268ffa4bec516c326d8a52aaca2fd619c44c3fe5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fSckPTdXgGK3mFOwN3dDSiZj639iuCN+kdFPXfxrYM8lAo4ZSJDANL3GeFd/8XIhK4j1UbsfJxOLdcPhrTD5Ag==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T11:41:03.150432Z","bundle_sha256":"aa10062b4b6438d6a9244eb6c720cd32ec3529a459ea4a5bd04ff28ab0bb97e4"}}