{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:KQPKQ2AXIAOGYKFVRNO3AFXXMX","short_pith_number":"pith:KQPKQ2AX","canonical_record":{"source":{"id":"1204.4299","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"gr-qc","submitted_at":"2012-04-19T09:53:15Z","cross_cats_sorted":[],"title_canon_sha256":"17711c8f290e0c26e7d5b91d771414b654490a711d4116c07e34a945dd0195d9","abstract_canon_sha256":"6d41a0c4530fe90660f83a5307fcaefbb694d4aca5cad8a4aab5e89f4df47472"},"schema_version":"1.0"},"canonical_sha256":"541ea86817401c6c28b58b5db016f765f40ebeae3627b6940fbd2c884007340d","source":{"kind":"arxiv","id":"1204.4299","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1204.4299","created_at":"2026-05-18T03:57:27Z"},{"alias_kind":"arxiv_version","alias_value":"1204.4299v1","created_at":"2026-05-18T03:57:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1204.4299","created_at":"2026-05-18T03:57:27Z"},{"alias_kind":"pith_short_12","alias_value":"KQPKQ2AXIAOG","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_16","alias_value":"KQPKQ2AXIAOGYKFV","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_8","alias_value":"KQPKQ2AX","created_at":"2026-05-18T12:27:11Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:KQPKQ2AXIAOGYKFVRNO3AFXXMX","target":"record","payload":{"canonical_record":{"source":{"id":"1204.4299","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"gr-qc","submitted_at":"2012-04-19T09:53:15Z","cross_cats_sorted":[],"title_canon_sha256":"17711c8f290e0c26e7d5b91d771414b654490a711d4116c07e34a945dd0195d9","abstract_canon_sha256":"6d41a0c4530fe90660f83a5307fcaefbb694d4aca5cad8a4aab5e89f4df47472"},"schema_version":"1.0"},"canonical_sha256":"541ea86817401c6c28b58b5db016f765f40ebeae3627b6940fbd2c884007340d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:57:27.880518Z","signature_b64":"gfVl6M6WnKeAweVs1FkZLMvZE0CO2VBEfCXvmIJkQwc+sIL3SANOEO8X9RbJE8oV5ljF/cg/inqPWWK/17UPAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"541ea86817401c6c28b58b5db016f765f40ebeae3627b6940fbd2c884007340d","last_reissued_at":"2026-05-18T03:57:27.879597Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:57:27.879597Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1204.4299","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":"2026-05-18T03:57:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"S4hl6/YAbC+kqBmIEtTy9SXBVSDTZTV2siZnxtF76Ep63VCFiRJAIpmkbXOjZ/oBBOlynYHJ4Xjtq2KC/KHyAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T21:57:40.367030Z"},"content_sha256":"07b551fd138292f56399bad538ad970a6fb57686afb0f76af813708226cff7d2","schema_version":"1.0","event_id":"sha256:07b551fd138292f56399bad538ad970a6fb57686afb0f76af813708226cff7d2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:KQPKQ2AXIAOGYKFVRNO3AFXXMX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spacetime Metrology with LISA Pathfinder","license":"http://creativecommons.org/licenses/by/3.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Giuseppe Congedo","submitted_at":"2012-04-19T09:53:15Z","abstract_excerpt":"LISA is the proposed ESA-NASA gravitational wave detector in the 0.1 mHz - 0.1 Hz band. LISA Pathfinder is the down-scaled version of a single LISA arm. The arm -- named Doppler link -- can be treated as a differential accelerometer, measuring the relative acceleration between test masses. LISA Pathfinder -- the in-flight test of the LISA instrumentation -- is currently in the final implementation and planned to be launched in 2014. It will set stringent constraints on the ability to put test masses in geodesic motion to within the required differential acceleration of 3\\times10^{-14} m s^{-2}"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1204.4299","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":"2026-05-18T03:57:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Jzs0TmIhSB2JF6Aa10FkIDVMiBbmrtx3BSuHjyMjvi9G2MCcJ9ECTVBJxy6eadm3j2h7H6Oq5gnw3NLvJgL3BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T21:57:40.367387Z"},"content_sha256":"00e3f784bff80b7f22307b3b74dfb3318fa7327994a6ba8ddc4e42e33f2d30c9","schema_version":"1.0","event_id":"sha256:00e3f784bff80b7f22307b3b74dfb3318fa7327994a6ba8ddc4e42e33f2d30c9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KQPKQ2AXIAOGYKFVRNO3AFXXMX/bundle.json","state_url":"https://pith.science/pith/KQPKQ2AXIAOGYKFVRNO3AFXXMX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KQPKQ2AXIAOGYKFVRNO3AFXXMX/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":"2026-06-04T21:57:40Z","links":{"resolver":"https://pith.science/pith/KQPKQ2AXIAOGYKFVRNO3AFXXMX","bundle":"https://pith.science/pith/KQPKQ2AXIAOGYKFVRNO3AFXXMX/bundle.json","state":"https://pith.science/pith/KQPKQ2AXIAOGYKFVRNO3AFXXMX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KQPKQ2AXIAOGYKFVRNO3AFXXMX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:KQPKQ2AXIAOGYKFVRNO3AFXXMX","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":"6d41a0c4530fe90660f83a5307fcaefbb694d4aca5cad8a4aab5e89f4df47472","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"gr-qc","submitted_at":"2012-04-19T09:53:15Z","title_canon_sha256":"17711c8f290e0c26e7d5b91d771414b654490a711d4116c07e34a945dd0195d9"},"schema_version":"1.0","source":{"id":"1204.4299","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1204.4299","created_at":"2026-05-18T03:57:27Z"},{"alias_kind":"arxiv_version","alias_value":"1204.4299v1","created_at":"2026-05-18T03:57:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1204.4299","created_at":"2026-05-18T03:57:27Z"},{"alias_kind":"pith_short_12","alias_value":"KQPKQ2AXIAOG","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_16","alias_value":"KQPKQ2AXIAOGYKFV","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_8","alias_value":"KQPKQ2AX","created_at":"2026-05-18T12:27:11Z"}],"graph_snapshots":[{"event_id":"sha256:00e3f784bff80b7f22307b3b74dfb3318fa7327994a6ba8ddc4e42e33f2d30c9","target":"graph","created_at":"2026-05-18T03:57:27Z","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":"LISA is the proposed ESA-NASA gravitational wave detector in the 0.1 mHz - 0.1 Hz band. LISA Pathfinder is the down-scaled version of a single LISA arm. The arm -- named Doppler link -- can be treated as a differential accelerometer, measuring the relative acceleration between test masses. LISA Pathfinder -- the in-flight test of the LISA instrumentation -- is currently in the final implementation and planned to be launched in 2014. It will set stringent constraints on the ability to put test masses in geodesic motion to within the required differential acceleration of 3\\times10^{-14} m s^{-2}","authors_text":"Giuseppe Congedo","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"gr-qc","submitted_at":"2012-04-19T09:53:15Z","title":"Spacetime Metrology with LISA Pathfinder"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1204.4299","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":"sha256:07b551fd138292f56399bad538ad970a6fb57686afb0f76af813708226cff7d2","target":"record","created_at":"2026-05-18T03:57:27Z","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":"6d41a0c4530fe90660f83a5307fcaefbb694d4aca5cad8a4aab5e89f4df47472","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"gr-qc","submitted_at":"2012-04-19T09:53:15Z","title_canon_sha256":"17711c8f290e0c26e7d5b91d771414b654490a711d4116c07e34a945dd0195d9"},"schema_version":"1.0","source":{"id":"1204.4299","kind":"arxiv","version":1}},"canonical_sha256":"541ea86817401c6c28b58b5db016f765f40ebeae3627b6940fbd2c884007340d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"541ea86817401c6c28b58b5db016f765f40ebeae3627b6940fbd2c884007340d","first_computed_at":"2026-05-18T03:57:27.879597Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:57:27.879597Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gfVl6M6WnKeAweVs1FkZLMvZE0CO2VBEfCXvmIJkQwc+sIL3SANOEO8X9RbJE8oV5ljF/cg/inqPWWK/17UPAA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:57:27.880518Z","signed_message":"canonical_sha256_bytes"},"source_id":"1204.4299","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:07b551fd138292f56399bad538ad970a6fb57686afb0f76af813708226cff7d2","sha256:00e3f784bff80b7f22307b3b74dfb3318fa7327994a6ba8ddc4e42e33f2d30c9"],"state_sha256":"b7a53a87943aca7eb386f0eeadd02840c6bc10f303f443c75863181e651e66c0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SSVXteukEUerW0azUsAZq5rG9xLIEHAY/Dg6pVOwTAKROLpUR09Mubn6klhqwCbM6POjY6WAk6MpxmWmyPuQAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T21:57:40.369527Z","bundle_sha256":"3af691f0047121e704c2def4d7863de984da2488072da5095b3f5b92d827e448"}}