{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:HSUGIH2HNSKVWUVFK6PAMGFSB7","short_pith_number":"pith:HSUGIH2H","canonical_record":{"source":{"id":"1307.0256","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2013-07-01T01:32:34Z","cross_cats_sorted":[],"title_canon_sha256":"3ff3092f5bd521e9c562aef92438e5c07aff7388f053a28072fc77225e6feaf6","abstract_canon_sha256":"46bdac10baf971c70beb2e3c42a421e96e170072ca956e6466b609350c0bc210"},"schema_version":"1.0"},"canonical_sha256":"3ca8641f476c955b52a5579e0618b20fdf08f696ccb21df92960cc0983bb2e00","source":{"kind":"arxiv","id":"1307.0256","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.0256","created_at":"2026-05-18T03:00:26Z"},{"alias_kind":"arxiv_version","alias_value":"1307.0256v3","created_at":"2026-05-18T03:00:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.0256","created_at":"2026-05-18T03:00:26Z"},{"alias_kind":"pith_short_12","alias_value":"HSUGIH2HNSKV","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_16","alias_value":"HSUGIH2HNSKVWUVF","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_8","alias_value":"HSUGIH2H","created_at":"2026-05-18T12:27:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:HSUGIH2HNSKVWUVFK6PAMGFSB7","target":"record","payload":{"canonical_record":{"source":{"id":"1307.0256","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2013-07-01T01:32:34Z","cross_cats_sorted":[],"title_canon_sha256":"3ff3092f5bd521e9c562aef92438e5c07aff7388f053a28072fc77225e6feaf6","abstract_canon_sha256":"46bdac10baf971c70beb2e3c42a421e96e170072ca956e6466b609350c0bc210"},"schema_version":"1.0"},"canonical_sha256":"3ca8641f476c955b52a5579e0618b20fdf08f696ccb21df92960cc0983bb2e00","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:00:26.168845Z","signature_b64":"j5+/7anQYDydYNytEh7A9+AC4uhB3F9SHrT9xBqGx5oswIZmK/ly1Kw8a0XWNs5yz5XM/Vj2k30Hu6DLXPrrCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3ca8641f476c955b52a5579e0618b20fdf08f696ccb21df92960cc0983bb2e00","last_reissued_at":"2026-05-18T03:00:26.167841Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:00:26.167841Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1307.0256","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:00:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ULft9Yfx3K8oWWK7DQ7Ra+0leoN/dtjYEUGeabvtGdPHROhUJNygqDlQ0gYuLrbHMnw1kmb3J3r00/HBrJUODQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-29T18:13:53.932830Z"},"content_sha256":"aee255d072eff3cea4a7d01baff2307075d61083992d01b8ce3c31e2319cbe4e","schema_version":"1.0","event_id":"sha256:aee255d072eff3cea4a7d01baff2307075d61083992d01b8ce3c31e2319cbe4e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:HSUGIH2HNSKVWUVFK6PAMGFSB7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Quantum astrometric observables II: time delay in linearized quantum gravity","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"B\\'eatrice Bonga, Igor Khavkine","submitted_at":"2013-07-01T01:32:34Z","abstract_excerpt":"A clock synchronization thought experiment is modeled by a diffeomorphism invariant \"time delay\" observable. In a sense, this observable probes the causal structure of the ambient Lorentzian spacetime. Thus, upon quantization, it is sensitive to the long expected smearing of the light cone by vacuum fluctuations in quantum gravity. After perturbative linearization, its mean and variance are computed in the Minkowski Fock vacuum of linearized gravity. The na\\\"ive divergence of the variance is meaningfully regularized by a length scale $\\mu$, the physical detector resolution. This is the first t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.0256","kind":"arxiv","version":3},"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":"2026-05-18T03:00:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"udVQ2ygWjcDVnSMQPhR4qt3Y3zelJwntaCfdCAwvN1S3gLangFU08PcSTneqrNjLheP0wb/Y6/3HxYa0Xr0/Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-29T18:13:53.933161Z"},"content_sha256":"fcede479c3845a4fd5fe235476f8c6a44a9a65a26aaa4a993b3c36bc8c7b3b71","schema_version":"1.0","event_id":"sha256:fcede479c3845a4fd5fe235476f8c6a44a9a65a26aaa4a993b3c36bc8c7b3b71"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HSUGIH2HNSKVWUVFK6PAMGFSB7/bundle.json","state_url":"https://pith.science/pith/HSUGIH2HNSKVWUVFK6PAMGFSB7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HSUGIH2HNSKVWUVFK6PAMGFSB7/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":"2026-06-29T18:13:53Z","links":{"resolver":"https://pith.science/pith/HSUGIH2HNSKVWUVFK6PAMGFSB7","bundle":"https://pith.science/pith/HSUGIH2HNSKVWUVFK6PAMGFSB7/bundle.json","state":"https://pith.science/pith/HSUGIH2HNSKVWUVFK6PAMGFSB7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HSUGIH2HNSKVWUVFK6PAMGFSB7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:HSUGIH2HNSKVWUVFK6PAMGFSB7","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":"46bdac10baf971c70beb2e3c42a421e96e170072ca956e6466b609350c0bc210","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2013-07-01T01:32:34Z","title_canon_sha256":"3ff3092f5bd521e9c562aef92438e5c07aff7388f053a28072fc77225e6feaf6"},"schema_version":"1.0","source":{"id":"1307.0256","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.0256","created_at":"2026-05-18T03:00:26Z"},{"alias_kind":"arxiv_version","alias_value":"1307.0256v3","created_at":"2026-05-18T03:00:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.0256","created_at":"2026-05-18T03:00:26Z"},{"alias_kind":"pith_short_12","alias_value":"HSUGIH2HNSKV","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_16","alias_value":"HSUGIH2HNSKVWUVF","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_8","alias_value":"HSUGIH2H","created_at":"2026-05-18T12:27:46Z"}],"graph_snapshots":[{"event_id":"sha256:fcede479c3845a4fd5fe235476f8c6a44a9a65a26aaa4a993b3c36bc8c7b3b71","target":"graph","created_at":"2026-05-18T03:00:26Z","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":"A clock synchronization thought experiment is modeled by a diffeomorphism invariant \"time delay\" observable. In a sense, this observable probes the causal structure of the ambient Lorentzian spacetime. Thus, upon quantization, it is sensitive to the long expected smearing of the light cone by vacuum fluctuations in quantum gravity. After perturbative linearization, its mean and variance are computed in the Minkowski Fock vacuum of linearized gravity. The na\\\"ive divergence of the variance is meaningfully regularized by a length scale $\\mu$, the physical detector resolution. This is the first t","authors_text":"B\\'eatrice Bonga, Igor Khavkine","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2013-07-01T01:32:34Z","title":"Quantum astrometric observables II: time delay in linearized quantum gravity"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.0256","kind":"arxiv","version":3},"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:aee255d072eff3cea4a7d01baff2307075d61083992d01b8ce3c31e2319cbe4e","target":"record","created_at":"2026-05-18T03:00:26Z","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":"46bdac10baf971c70beb2e3c42a421e96e170072ca956e6466b609350c0bc210","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2013-07-01T01:32:34Z","title_canon_sha256":"3ff3092f5bd521e9c562aef92438e5c07aff7388f053a28072fc77225e6feaf6"},"schema_version":"1.0","source":{"id":"1307.0256","kind":"arxiv","version":3}},"canonical_sha256":"3ca8641f476c955b52a5579e0618b20fdf08f696ccb21df92960cc0983bb2e00","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3ca8641f476c955b52a5579e0618b20fdf08f696ccb21df92960cc0983bb2e00","first_computed_at":"2026-05-18T03:00:26.167841Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:00:26.167841Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"j5+/7anQYDydYNytEh7A9+AC4uhB3F9SHrT9xBqGx5oswIZmK/ly1Kw8a0XWNs5yz5XM/Vj2k30Hu6DLXPrrCw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:00:26.168845Z","signed_message":"canonical_sha256_bytes"},"source_id":"1307.0256","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:aee255d072eff3cea4a7d01baff2307075d61083992d01b8ce3c31e2319cbe4e","sha256:fcede479c3845a4fd5fe235476f8c6a44a9a65a26aaa4a993b3c36bc8c7b3b71"],"state_sha256":"bdb207e768ca9d837be1c68fd468df337578fca667fcd3271c8ca78c61a46add"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wXjvyS0OtxKFWFyuRPQVV7MvRuzbCbszzn3PNH1AYZlOkRfp6rRFeH+5Eca4Fk0Hqvr4E8SxNbH0RCWsj9HyBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-29T18:13:53.935002Z","bundle_sha256":"60329add362772e78f0afb5d4b9fd16e198fea5dc7221c64289fd60f42ee4feb"}}