{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:CW6ZCYLZPXCSFQ5VF3XMTWG7LF","short_pith_number":"pith:CW6ZCYLZ","canonical_record":{"source":{"id":"1202.2206","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2012-02-10T08:09:32Z","cross_cats_sorted":[],"title_canon_sha256":"af42589fffbb21db234d9574df407fe16e014485a87b9a9d3c8c1ceddac1924b","abstract_canon_sha256":"dc3c2e1cfe294cbe6608beee10e38f3df381b40f6e69d8adec823477d00bd512"},"schema_version":"1.0"},"canonical_sha256":"15bd9161797dc522c3b52eeec9d8df597a6eb8de508c4722958361b492602a15","source":{"kind":"arxiv","id":"1202.2206","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1202.2206","created_at":"2026-05-18T03:55:46Z"},{"alias_kind":"arxiv_version","alias_value":"1202.2206v2","created_at":"2026-05-18T03:55:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1202.2206","created_at":"2026-05-18T03:55:46Z"},{"alias_kind":"pith_short_12","alias_value":"CW6ZCYLZPXCS","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_16","alias_value":"CW6ZCYLZPXCSFQ5V","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_8","alias_value":"CW6ZCYLZ","created_at":"2026-05-18T12:27:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:CW6ZCYLZPXCSFQ5VF3XMTWG7LF","target":"record","payload":{"canonical_record":{"source":{"id":"1202.2206","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2012-02-10T08:09:32Z","cross_cats_sorted":[],"title_canon_sha256":"af42589fffbb21db234d9574df407fe16e014485a87b9a9d3c8c1ceddac1924b","abstract_canon_sha256":"dc3c2e1cfe294cbe6608beee10e38f3df381b40f6e69d8adec823477d00bd512"},"schema_version":"1.0"},"canonical_sha256":"15bd9161797dc522c3b52eeec9d8df597a6eb8de508c4722958361b492602a15","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:55:46.514697Z","signature_b64":"qmlB70Z9Ns+wsp5YXQZWC553WMzbqBN6bR7VVuFxIHLKe6L8akD6i0M8lfzv13MzXHQLgxWFSLz7ukC0w3fpAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"15bd9161797dc522c3b52eeec9d8df597a6eb8de508c4722958361b492602a15","last_reissued_at":"2026-05-18T03:55:46.514282Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:55:46.514282Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1202.2206","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":"2026-05-18T03:55:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EMGtQz/x1QCqHmmLbuiB7+DM9B+M1gnAd9pS1TiIfVwQAybJoE4ZVJDRyuHMJ+OZoAbQcd9IhWFp9OxgGmrOCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T13:55:35.938051Z"},"content_sha256":"1adf4361223eb359853a4f7264cfd0637280da250a1f53f337e4ad8da3316ae3","schema_version":"1.0","event_id":"sha256:1adf4361223eb359853a4f7264cfd0637280da250a1f53f337e4ad8da3316ae3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:CW6ZCYLZPXCSFQ5VF3XMTWG7LF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Ultra-low-phase-noise cryocooled microwave dielectric-sapphire-resonator oscillators with 1 x 10^-16 frequency instability","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.ins-det","authors_text":"Chuan Lu, John G. Hartnett, Nitin R. Nand","submitted_at":"2012-02-10T08:09:32Z","abstract_excerpt":"Two nominally identical ultra-stable cryogenic microwave oscillators are compared. Each incorporates a dielectric-sapphire resonator cooled to near 6 K in an ultra-low vibration cryostat using a low-vibration pulse-tube cryocooler. The phase noise for a single oscillator is measured at -105 dBc/Hz at 1 Hz offset on the 11.2 GHz carrier. The oscillator fractional frequency stability is characterized in terms of Allan deviation by 5.3 x 10^-16 tau^-1/2 + 9 x 10^-17 for integration times 0.1 s < tau < 1000 s and is limited by a flicker frequency noise floor below 1 x 10^-16. This result is better"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1202.2206","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":"2026-05-18T03:55:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"g5EwGOMGRJqfSYFjq8h/ThhK9ZLFTdYnhJmgSuegB8o0KCDCUeh4+8XVyPBo2DytEa8+LNwLCv+NFWTK9Cg8Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T13:55:35.938403Z"},"content_sha256":"d28d5ab48e3fbe8d486da6a6e09ca0773f8ca6da397b86c7793535f3ac7f88c3","schema_version":"1.0","event_id":"sha256:d28d5ab48e3fbe8d486da6a6e09ca0773f8ca6da397b86c7793535f3ac7f88c3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CW6ZCYLZPXCSFQ5VF3XMTWG7LF/bundle.json","state_url":"https://pith.science/pith/CW6ZCYLZPXCSFQ5VF3XMTWG7LF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CW6ZCYLZPXCSFQ5VF3XMTWG7LF/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":"2026-06-03T13:55:35Z","links":{"resolver":"https://pith.science/pith/CW6ZCYLZPXCSFQ5VF3XMTWG7LF","bundle":"https://pith.science/pith/CW6ZCYLZPXCSFQ5VF3XMTWG7LF/bundle.json","state":"https://pith.science/pith/CW6ZCYLZPXCSFQ5VF3XMTWG7LF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CW6ZCYLZPXCSFQ5VF3XMTWG7LF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:CW6ZCYLZPXCSFQ5VF3XMTWG7LF","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":"dc3c2e1cfe294cbe6608beee10e38f3df381b40f6e69d8adec823477d00bd512","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2012-02-10T08:09:32Z","title_canon_sha256":"af42589fffbb21db234d9574df407fe16e014485a87b9a9d3c8c1ceddac1924b"},"schema_version":"1.0","source":{"id":"1202.2206","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1202.2206","created_at":"2026-05-18T03:55:46Z"},{"alias_kind":"arxiv_version","alias_value":"1202.2206v2","created_at":"2026-05-18T03:55:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1202.2206","created_at":"2026-05-18T03:55:46Z"},{"alias_kind":"pith_short_12","alias_value":"CW6ZCYLZPXCS","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_16","alias_value":"CW6ZCYLZPXCSFQ5V","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_8","alias_value":"CW6ZCYLZ","created_at":"2026-05-18T12:27:01Z"}],"graph_snapshots":[{"event_id":"sha256:d28d5ab48e3fbe8d486da6a6e09ca0773f8ca6da397b86c7793535f3ac7f88c3","target":"graph","created_at":"2026-05-18T03:55:46Z","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":"Two nominally identical ultra-stable cryogenic microwave oscillators are compared. Each incorporates a dielectric-sapphire resonator cooled to near 6 K in an ultra-low vibration cryostat using a low-vibration pulse-tube cryocooler. The phase noise for a single oscillator is measured at -105 dBc/Hz at 1 Hz offset on the 11.2 GHz carrier. The oscillator fractional frequency stability is characterized in terms of Allan deviation by 5.3 x 10^-16 tau^-1/2 + 9 x 10^-17 for integration times 0.1 s < tau < 1000 s and is limited by a flicker frequency noise floor below 1 x 10^-16. This result is better","authors_text":"Chuan Lu, John G. Hartnett, Nitin R. Nand","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2012-02-10T08:09:32Z","title":"Ultra-low-phase-noise cryocooled microwave dielectric-sapphire-resonator oscillators with 1 x 10^-16 frequency instability"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1202.2206","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":"sha256:1adf4361223eb359853a4f7264cfd0637280da250a1f53f337e4ad8da3316ae3","target":"record","created_at":"2026-05-18T03:55:46Z","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":"dc3c2e1cfe294cbe6608beee10e38f3df381b40f6e69d8adec823477d00bd512","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2012-02-10T08:09:32Z","title_canon_sha256":"af42589fffbb21db234d9574df407fe16e014485a87b9a9d3c8c1ceddac1924b"},"schema_version":"1.0","source":{"id":"1202.2206","kind":"arxiv","version":2}},"canonical_sha256":"15bd9161797dc522c3b52eeec9d8df597a6eb8de508c4722958361b492602a15","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"15bd9161797dc522c3b52eeec9d8df597a6eb8de508c4722958361b492602a15","first_computed_at":"2026-05-18T03:55:46.514282Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:55:46.514282Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qmlB70Z9Ns+wsp5YXQZWC553WMzbqBN6bR7VVuFxIHLKe6L8akD6i0M8lfzv13MzXHQLgxWFSLz7ukC0w3fpAw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:55:46.514697Z","signed_message":"canonical_sha256_bytes"},"source_id":"1202.2206","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1adf4361223eb359853a4f7264cfd0637280da250a1f53f337e4ad8da3316ae3","sha256:d28d5ab48e3fbe8d486da6a6e09ca0773f8ca6da397b86c7793535f3ac7f88c3"],"state_sha256":"21c420af8721fae350ec241afd7c017cd030cb0d28bd541d4e1b600293a8e701"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"h2LqokXdSI19OsRs7QsEF/k7N0c2oMI85yY21wrmuFL78eK4GvjhliXTPgPcjQYpIWEBtLq0FuziVfq97gohDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T13:55:35.940367Z","bundle_sha256":"69d34ae83fe6e5b025281391165442ba6c0dbb8a78733bec513e5565a3054407"}}