{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:G4B3PUFSTTK37HWSS335EN7Z7Q","short_pith_number":"pith:G4B3PUFS","canonical_record":{"source":{"id":"1508.03279","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-08-13T17:41:23Z","cross_cats_sorted":[],"title_canon_sha256":"9c2d787bbf1e9108d055f735424832d77c3bc90d7baa7bc82bc950625936b7e1","abstract_canon_sha256":"d8facdd6d6db57f25b74f24c0cc430117fd273eab54636fc756e0a4726764243"},"schema_version":"1.0"},"canonical_sha256":"3703b7d0b29cd5bf9ed296f7d237f9fc1dfa9e7e4d45a245bf7120e90993fb73","source":{"kind":"arxiv","id":"1508.03279","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.03279","created_at":"2026-05-18T01:35:21Z"},{"alias_kind":"arxiv_version","alias_value":"1508.03279v1","created_at":"2026-05-18T01:35:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.03279","created_at":"2026-05-18T01:35:21Z"},{"alias_kind":"pith_short_12","alias_value":"G4B3PUFSTTK3","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_16","alias_value":"G4B3PUFSTTK37HWS","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_8","alias_value":"G4B3PUFS","created_at":"2026-05-18T12:29:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:G4B3PUFSTTK37HWSS335EN7Z7Q","target":"record","payload":{"canonical_record":{"source":{"id":"1508.03279","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-08-13T17:41:23Z","cross_cats_sorted":[],"title_canon_sha256":"9c2d787bbf1e9108d055f735424832d77c3bc90d7baa7bc82bc950625936b7e1","abstract_canon_sha256":"d8facdd6d6db57f25b74f24c0cc430117fd273eab54636fc756e0a4726764243"},"schema_version":"1.0"},"canonical_sha256":"3703b7d0b29cd5bf9ed296f7d237f9fc1dfa9e7e4d45a245bf7120e90993fb73","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:35:21.234193Z","signature_b64":"RqYLy9LaK2imFU47Haxvug1pNXzETS9wWLPEs2EWYY5ZK7fWyq3SS8Hn+8ITmHjsdsKrgppRRK7FOaDAsHJjBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3703b7d0b29cd5bf9ed296f7d237f9fc1dfa9e7e4d45a245bf7120e90993fb73","last_reissued_at":"2026-05-18T01:35:21.233346Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:35:21.233346Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1508.03279","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":"2026-05-18T01:35:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aJzVLOGkZb8I2QFsjyLWjrxx9q3JxlyXvvr730vP1uxWyYbTlAxYj31mqN4+Y7IhfSvvGg3nPT9HMBTMgDLlBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T23:35:17.573543Z"},"content_sha256":"03087a67a9349043c1afb3f2d626ecfc2dbbd2c36677476d4331ccb21c6f83c6","schema_version":"1.0","event_id":"sha256:03087a67a9349043c1afb3f2d626ecfc2dbbd2c36677476d4331ccb21c6f83c6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:G4B3PUFSTTK37HWSS335EN7Z7Q","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A HBAR-oscillator-based 4.596~GHz frequency source: Application to a coherent population trapping Cs vapor cell atomic clock","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.ins-det","authors_text":"Gilles Martin, Jean-Michel Friedt, Rodolphe Boudot, Thomas Daugey","submitted_at":"2015-08-13T17:41:23Z","abstract_excerpt":"This article reports on the design and characterization of a high-overtone bulk acoustic wave resonator (HBAR)-oscillator-based 4.596~GHz frequency source. A 2.298~GHz signal, generated by an oscillator constructed around a thermally-controlled two-port AlN-sapphire HBAR resonator with a Q-factor of 24000 at 68$^{\\circ}$C, is frequency multiplied by 2 to 4.596~GHz, half of the Cs atom clock frequency. The temperature coefficient of frequency (TCF) of the HBAR is measured to be $-23$~ppm/$^{\\circ}$C at 2.298~GHz. The measured phase noise of the 4.596~GHz source is $-105$~dBrad$^2$/Hz at 1~kHz o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.03279","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":"2026-05-18T01:35:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Aj/Tk3IkX6pG9hFcgfDqk8rETveIOHUTSVAYYyITo4YPRyJreWkDAIRAexla2faUlgjU5TUSmX+2DQbFnwUkDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T23:35:17.574235Z"},"content_sha256":"d80e317725bd48c234c17f84d0e3821095cb81e66e708cfa1338daa1d9aea3e7","schema_version":"1.0","event_id":"sha256:d80e317725bd48c234c17f84d0e3821095cb81e66e708cfa1338daa1d9aea3e7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/G4B3PUFSTTK37HWSS335EN7Z7Q/bundle.json","state_url":"https://pith.science/pith/G4B3PUFSTTK37HWSS335EN7Z7Q/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/G4B3PUFSTTK37HWSS335EN7Z7Q/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":"2026-05-23T23:35:17Z","links":{"resolver":"https://pith.science/pith/G4B3PUFSTTK37HWSS335EN7Z7Q","bundle":"https://pith.science/pith/G4B3PUFSTTK37HWSS335EN7Z7Q/bundle.json","state":"https://pith.science/pith/G4B3PUFSTTK37HWSS335EN7Z7Q/state.json","well_known_bundle":"https://pith.science/.well-known/pith/G4B3PUFSTTK37HWSS335EN7Z7Q/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:G4B3PUFSTTK37HWSS335EN7Z7Q","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":"d8facdd6d6db57f25b74f24c0cc430117fd273eab54636fc756e0a4726764243","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-08-13T17:41:23Z","title_canon_sha256":"9c2d787bbf1e9108d055f735424832d77c3bc90d7baa7bc82bc950625936b7e1"},"schema_version":"1.0","source":{"id":"1508.03279","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.03279","created_at":"2026-05-18T01:35:21Z"},{"alias_kind":"arxiv_version","alias_value":"1508.03279v1","created_at":"2026-05-18T01:35:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.03279","created_at":"2026-05-18T01:35:21Z"},{"alias_kind":"pith_short_12","alias_value":"G4B3PUFSTTK3","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_16","alias_value":"G4B3PUFSTTK37HWS","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_8","alias_value":"G4B3PUFS","created_at":"2026-05-18T12:29:22Z"}],"graph_snapshots":[{"event_id":"sha256:d80e317725bd48c234c17f84d0e3821095cb81e66e708cfa1338daa1d9aea3e7","target":"graph","created_at":"2026-05-18T01:35:21Z","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":"This article reports on the design and characterization of a high-overtone bulk acoustic wave resonator (HBAR)-oscillator-based 4.596~GHz frequency source. A 2.298~GHz signal, generated by an oscillator constructed around a thermally-controlled two-port AlN-sapphire HBAR resonator with a Q-factor of 24000 at 68$^{\\circ}$C, is frequency multiplied by 2 to 4.596~GHz, half of the Cs atom clock frequency. The temperature coefficient of frequency (TCF) of the HBAR is measured to be $-23$~ppm/$^{\\circ}$C at 2.298~GHz. The measured phase noise of the 4.596~GHz source is $-105$~dBrad$^2$/Hz at 1~kHz o","authors_text":"Gilles Martin, Jean-Michel Friedt, Rodolphe Boudot, Thomas Daugey","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-08-13T17:41:23Z","title":"A HBAR-oscillator-based 4.596~GHz frequency source: Application to a coherent population trapping Cs vapor cell atomic clock"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.03279","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":"sha256:03087a67a9349043c1afb3f2d626ecfc2dbbd2c36677476d4331ccb21c6f83c6","target":"record","created_at":"2026-05-18T01:35:21Z","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":"d8facdd6d6db57f25b74f24c0cc430117fd273eab54636fc756e0a4726764243","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-08-13T17:41:23Z","title_canon_sha256":"9c2d787bbf1e9108d055f735424832d77c3bc90d7baa7bc82bc950625936b7e1"},"schema_version":"1.0","source":{"id":"1508.03279","kind":"arxiv","version":1}},"canonical_sha256":"3703b7d0b29cd5bf9ed296f7d237f9fc1dfa9e7e4d45a245bf7120e90993fb73","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3703b7d0b29cd5bf9ed296f7d237f9fc1dfa9e7e4d45a245bf7120e90993fb73","first_computed_at":"2026-05-18T01:35:21.233346Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:35:21.233346Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RqYLy9LaK2imFU47Haxvug1pNXzETS9wWLPEs2EWYY5ZK7fWyq3SS8Hn+8ITmHjsdsKrgppRRK7FOaDAsHJjBw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:35:21.234193Z","signed_message":"canonical_sha256_bytes"},"source_id":"1508.03279","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:03087a67a9349043c1afb3f2d626ecfc2dbbd2c36677476d4331ccb21c6f83c6","sha256:d80e317725bd48c234c17f84d0e3821095cb81e66e708cfa1338daa1d9aea3e7"],"state_sha256":"fa984d5f15e7b481d8b3e05ece6880edbaf1911ada7d22b5a9f4024080f0151d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pw/Nho1hZbtANaavofICq5yQE+Ek785Ml3yjyS4h9i1FZ9JQ78ZYdJQs/DxajxNAhWhqRYujigYg2zIbiRzPDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-23T23:35:17.577777Z","bundle_sha256":"99ae60cb4d8b10b211bba76554b5125b360f14ae1ad9c79821113ae02277d4a8"}}