{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:BOD3YR2LAONU46ECT6IDOUYB4Z","short_pith_number":"pith:BOD3YR2L","canonical_record":{"source":{"id":"1711.07730","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-11-21T11:43:14Z","cross_cats_sorted":[],"title_canon_sha256":"f34a623e81841becf2572481acf46aba1387116cbca7a5de658a857e28fa256d","abstract_canon_sha256":"fa20f657aa59c482bc1cda86adb6eb5da8fdc921bf8b24da4d720ee58aae424e"},"schema_version":"1.0"},"canonical_sha256":"0b87bc474b039b4e78829f90375301e64eb1f8f7a9a35f0ab7d4884e98fe275c","source":{"kind":"arxiv","id":"1711.07730","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.07730","created_at":"2026-05-18T00:18:15Z"},{"alias_kind":"arxiv_version","alias_value":"1711.07730v2","created_at":"2026-05-18T00:18:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.07730","created_at":"2026-05-18T00:18:15Z"},{"alias_kind":"pith_short_12","alias_value":"BOD3YR2LAONU","created_at":"2026-05-18T12:31:08Z"},{"alias_kind":"pith_short_16","alias_value":"BOD3YR2LAONU46EC","created_at":"2026-05-18T12:31:08Z"},{"alias_kind":"pith_short_8","alias_value":"BOD3YR2L","created_at":"2026-05-18T12:31:08Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:BOD3YR2LAONU46ECT6IDOUYB4Z","target":"record","payload":{"canonical_record":{"source":{"id":"1711.07730","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-11-21T11:43:14Z","cross_cats_sorted":[],"title_canon_sha256":"f34a623e81841becf2572481acf46aba1387116cbca7a5de658a857e28fa256d","abstract_canon_sha256":"fa20f657aa59c482bc1cda86adb6eb5da8fdc921bf8b24da4d720ee58aae424e"},"schema_version":"1.0"},"canonical_sha256":"0b87bc474b039b4e78829f90375301e64eb1f8f7a9a35f0ab7d4884e98fe275c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:18:15.055988Z","signature_b64":"UHPt4X/fANB/I5ykONtXPdcwyHc83rBv9RIGMi42sfy4pH+xTDFmEgdOLAo6jGEKbIJjl8Obg5ZM0kzEFRU3DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0b87bc474b039b4e78829f90375301e64eb1f8f7a9a35f0ab7d4884e98fe275c","last_reissued_at":"2026-05-18T00:18:15.055624Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:18:15.055624Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1711.07730","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":"2026-05-18T00:18:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QiySIbK0YRGxs1DeuKMko4xo4+WF1JBF9iTaQbCjRvK2VTOPD4D+AJBOVpZDCBDuj4H+SBkP+VOxpdCl1xWVDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T23:04:57.518839Z"},"content_sha256":"fe173540f542ae655d59ffc3a606c4888099a3fd13f3229cb2992bd3d36b128f","schema_version":"1.0","event_id":"sha256:fe173540f542ae655d59ffc3a606c4888099a3fd13f3229cb2992bd3d36b128f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:BOD3YR2LAONU46ECT6IDOUYB4Z","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Low-frequency Gravitational Wave Detection via Double Optical Clocks in Space","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Jianfeng Su, Philippe Jetzer, Qiang Wang, Qinghua Wang","submitted_at":"2017-11-21T11:43:14Z","abstract_excerpt":"We propose a Doppler tracking system for gravitational wave detection via Double Optical Clocks in Space (DOCS). In this configuration two spacecrafts (each containing an optical clock) are launched to space for Doppler shift observations. Compared to the similar attempt of gravitational wave detection in the Cassini mission, the radio signal of DOCS that contains the relative frequency changes avoids completely noise effects due for instance to troposphere, ionosphere, ground-based antenna and transponder. Given the high stabilities of the two optical clocks (Allan deviation $\\sim 4.1\\times 1"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.07730","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":"2026-05-18T00:18:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"omFwdXVcBwB5X0DtmA15Bjl3Ncw6+CytSNiHhUd9nFkw12XJocKRtvYIpgOgDwApoAenVtRSJ+2V3zvXs6imCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T23:04:57.519512Z"},"content_sha256":"647fbc92f54b7f3e1b4e2925df887070a07aa37b898bc8349545a48875b69b7b","schema_version":"1.0","event_id":"sha256:647fbc92f54b7f3e1b4e2925df887070a07aa37b898bc8349545a48875b69b7b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BOD3YR2LAONU46ECT6IDOUYB4Z/bundle.json","state_url":"https://pith.science/pith/BOD3YR2LAONU46ECT6IDOUYB4Z/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BOD3YR2LAONU46ECT6IDOUYB4Z/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":"2026-06-06T23:04:57Z","links":{"resolver":"https://pith.science/pith/BOD3YR2LAONU46ECT6IDOUYB4Z","bundle":"https://pith.science/pith/BOD3YR2LAONU46ECT6IDOUYB4Z/bundle.json","state":"https://pith.science/pith/BOD3YR2LAONU46ECT6IDOUYB4Z/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BOD3YR2LAONU46ECT6IDOUYB4Z/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:BOD3YR2LAONU46ECT6IDOUYB4Z","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":"fa20f657aa59c482bc1cda86adb6eb5da8fdc921bf8b24da4d720ee58aae424e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-11-21T11:43:14Z","title_canon_sha256":"f34a623e81841becf2572481acf46aba1387116cbca7a5de658a857e28fa256d"},"schema_version":"1.0","source":{"id":"1711.07730","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.07730","created_at":"2026-05-18T00:18:15Z"},{"alias_kind":"arxiv_version","alias_value":"1711.07730v2","created_at":"2026-05-18T00:18:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.07730","created_at":"2026-05-18T00:18:15Z"},{"alias_kind":"pith_short_12","alias_value":"BOD3YR2LAONU","created_at":"2026-05-18T12:31:08Z"},{"alias_kind":"pith_short_16","alias_value":"BOD3YR2LAONU46EC","created_at":"2026-05-18T12:31:08Z"},{"alias_kind":"pith_short_8","alias_value":"BOD3YR2L","created_at":"2026-05-18T12:31:08Z"}],"graph_snapshots":[{"event_id":"sha256:647fbc92f54b7f3e1b4e2925df887070a07aa37b898bc8349545a48875b69b7b","target":"graph","created_at":"2026-05-18T00:18:15Z","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":"We propose a Doppler tracking system for gravitational wave detection via Double Optical Clocks in Space (DOCS). In this configuration two spacecrafts (each containing an optical clock) are launched to space for Doppler shift observations. Compared to the similar attempt of gravitational wave detection in the Cassini mission, the radio signal of DOCS that contains the relative frequency changes avoids completely noise effects due for instance to troposphere, ionosphere, ground-based antenna and transponder. Given the high stabilities of the two optical clocks (Allan deviation $\\sim 4.1\\times 1","authors_text":"Jianfeng Su, Philippe Jetzer, Qiang Wang, Qinghua Wang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-11-21T11:43:14Z","title":"Low-frequency Gravitational Wave Detection via Double Optical Clocks in Space"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.07730","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:fe173540f542ae655d59ffc3a606c4888099a3fd13f3229cb2992bd3d36b128f","target":"record","created_at":"2026-05-18T00:18:15Z","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":"fa20f657aa59c482bc1cda86adb6eb5da8fdc921bf8b24da4d720ee58aae424e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-11-21T11:43:14Z","title_canon_sha256":"f34a623e81841becf2572481acf46aba1387116cbca7a5de658a857e28fa256d"},"schema_version":"1.0","source":{"id":"1711.07730","kind":"arxiv","version":2}},"canonical_sha256":"0b87bc474b039b4e78829f90375301e64eb1f8f7a9a35f0ab7d4884e98fe275c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0b87bc474b039b4e78829f90375301e64eb1f8f7a9a35f0ab7d4884e98fe275c","first_computed_at":"2026-05-18T00:18:15.055624Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:18:15.055624Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"UHPt4X/fANB/I5ykONtXPdcwyHc83rBv9RIGMi42sfy4pH+xTDFmEgdOLAo6jGEKbIJjl8Obg5ZM0kzEFRU3DQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:18:15.055988Z","signed_message":"canonical_sha256_bytes"},"source_id":"1711.07730","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fe173540f542ae655d59ffc3a606c4888099a3fd13f3229cb2992bd3d36b128f","sha256:647fbc92f54b7f3e1b4e2925df887070a07aa37b898bc8349545a48875b69b7b"],"state_sha256":"98d7b0bcd5b1dd05218365610567d567ec903333aa15ea00a6a29bb6e40f36a7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"y/POwPS4d0SMADPLIllfrc0OxYhHfUBKdHeTnWkpJ2qXNSsGvhAKT0ejBUT/4ds527uIt8LLIwA1AA/IV5d7Cg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T23:04:57.523374Z","bundle_sha256":"a9dcdd91bdb9698a4903b0b8d780a390b93ff10c69bff49456b103af73b9b1c7"}}