{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2007:O3VF54LVOAG6KAQ345XHNWQCSK","short_pith_number":"pith:O3VF54LV","canonical_record":{"source":{"id":"0712.2542","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"gr-qc","submitted_at":"2007-12-15T22:40:16Z","cross_cats_sorted":[],"title_canon_sha256":"47b2f078d0719d09d28f25a9ffafef6eb5dc6c0492ab4a8eda894c78a5d16c82","abstract_canon_sha256":"d2fd50fff6a05c3d6819efdc2c8cedc13a6587321d38874f0df5913fb67a1b7e"},"schema_version":"1.0"},"canonical_sha256":"76ea5ef175700de5021be76e76da02928aa158299fe6a8a3ebf9357164d94c20","source":{"kind":"arxiv","id":"0712.2542","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0712.2542","created_at":"2026-07-04T15:38:15Z"},{"alias_kind":"arxiv_version","alias_value":"0712.2542v1","created_at":"2026-07-04T15:38:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0712.2542","created_at":"2026-07-04T15:38:15Z"},{"alias_kind":"pith_short_12","alias_value":"O3VF54LVOAG6","created_at":"2026-07-04T15:38:15Z"},{"alias_kind":"pith_short_16","alias_value":"O3VF54LVOAG6KAQ3","created_at":"2026-07-04T15:38:15Z"},{"alias_kind":"pith_short_8","alias_value":"O3VF54LV","created_at":"2026-07-04T15:38:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2007:O3VF54LVOAG6KAQ345XHNWQCSK","target":"record","payload":{"canonical_record":{"source":{"id":"0712.2542","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"gr-qc","submitted_at":"2007-12-15T22:40:16Z","cross_cats_sorted":[],"title_canon_sha256":"47b2f078d0719d09d28f25a9ffafef6eb5dc6c0492ab4a8eda894c78a5d16c82","abstract_canon_sha256":"d2fd50fff6a05c3d6819efdc2c8cedc13a6587321d38874f0df5913fb67a1b7e"},"schema_version":"1.0"},"canonical_sha256":"76ea5ef175700de5021be76e76da02928aa158299fe6a8a3ebf9357164d94c20","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:38:15.225960Z","signature_b64":"aXHKaEC2WIRpZXEZpde/ayqCPkTHnMAvKIR5T91xY6kXOQEoZBWCiL09pw860HkylfISUFVDi3Wo95sllMxVAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"76ea5ef175700de5021be76e76da02928aa158299fe6a8a3ebf9357164d94c20","last_reissued_at":"2026-07-04T15:38:15.225387Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:38:15.225387Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0712.2542","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":"2026-07-04T15:38:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QRafokdjflKCOVjdu7O2HV90rTp3JNxnJmCl2LWFi58sw2mODPnOD7lcDR5MZOYOjORM/qceHpY2tlHU/OPCCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-25T18:01:27.209031Z"},"content_sha256":"00ff35f3b66224d1f637abfd121ecb572983b31203161af1f3e3bcdd2f1b2292","schema_version":"1.0","event_id":"sha256:00ff35f3b66224d1f637abfd121ecb572983b31203161af1f3e3bcdd2f1b2292"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2007:O3VF54LVOAG6KAQ345XHNWQCSK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A gravitational-wave probe of effective quantum gravity","license":"","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Lee Samuel Finn, Nicolas Yunes, Stephon Alexander","submitted_at":"2007-12-15T22:40:16Z","abstract_excerpt":"The Green-Schwarz anomaly-cancelling mechanism in string theories requires a Chern-Simons term in the Einstein-Hilbert action, which leads to an amplitude birefringence of spacetime for the propagation of gravitational waves. While the degree of birefringence may be intrinsically small, its effects on a gravitational wave will accumulate as the wave propagates. The proposed Laser Interferometer Space Antenna (LISA) will be sensitive enough to observe the gravitational waves from sources at cosmological distances great enough that interesting bounds on the Chern-Simons may be found. Here we eva"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0712.2542","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0712.2542/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T15:38:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"86Mlt0qD6TWQThEaz6lw3vI6FfPdEUTgTMLCb+afU4AEJ4kjdC2W63A1gJjgx1v+DfohO4KJ9cWi9Fivnp6fAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-25T18:01:27.209417Z"},"content_sha256":"0eb9bf2fc5a6c04a35f436ce8888ee941c5a967d24ad284d017f6c747abc4fe8","schema_version":"1.0","event_id":"sha256:0eb9bf2fc5a6c04a35f436ce8888ee941c5a967d24ad284d017f6c747abc4fe8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/O3VF54LVOAG6KAQ345XHNWQCSK/bundle.json","state_url":"https://pith.science/pith/O3VF54LVOAG6KAQ345XHNWQCSK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/O3VF54LVOAG6KAQ345XHNWQCSK/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":"2026-07-25T18:01:27Z","links":{"resolver":"https://pith.science/pith/O3VF54LVOAG6KAQ345XHNWQCSK","bundle":"https://pith.science/pith/O3VF54LVOAG6KAQ345XHNWQCSK/bundle.json","state":"https://pith.science/pith/O3VF54LVOAG6KAQ345XHNWQCSK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/O3VF54LVOAG6KAQ345XHNWQCSK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:O3VF54LVOAG6KAQ345XHNWQCSK","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":"d2fd50fff6a05c3d6819efdc2c8cedc13a6587321d38874f0df5913fb67a1b7e","cross_cats_sorted":[],"license":"","primary_cat":"gr-qc","submitted_at":"2007-12-15T22:40:16Z","title_canon_sha256":"47b2f078d0719d09d28f25a9ffafef6eb5dc6c0492ab4a8eda894c78a5d16c82"},"schema_version":"1.0","source":{"id":"0712.2542","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0712.2542","created_at":"2026-07-04T15:38:15Z"},{"alias_kind":"arxiv_version","alias_value":"0712.2542v1","created_at":"2026-07-04T15:38:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0712.2542","created_at":"2026-07-04T15:38:15Z"},{"alias_kind":"pith_short_12","alias_value":"O3VF54LVOAG6","created_at":"2026-07-04T15:38:15Z"},{"alias_kind":"pith_short_16","alias_value":"O3VF54LVOAG6KAQ3","created_at":"2026-07-04T15:38:15Z"},{"alias_kind":"pith_short_8","alias_value":"O3VF54LV","created_at":"2026-07-04T15:38:15Z"}],"graph_snapshots":[{"event_id":"sha256:0eb9bf2fc5a6c04a35f436ce8888ee941c5a967d24ad284d017f6c747abc4fe8","target":"graph","created_at":"2026-07-04T15:38:15Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/0712.2542/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The Green-Schwarz anomaly-cancelling mechanism in string theories requires a Chern-Simons term in the Einstein-Hilbert action, which leads to an amplitude birefringence of spacetime for the propagation of gravitational waves. While the degree of birefringence may be intrinsically small, its effects on a gravitational wave will accumulate as the wave propagates. The proposed Laser Interferometer Space Antenna (LISA) will be sensitive enough to observe the gravitational waves from sources at cosmological distances great enough that interesting bounds on the Chern-Simons may be found. Here we eva","authors_text":"Lee Samuel Finn, Nicolas Yunes, Stephon Alexander","cross_cats":[],"headline":"","license":"","primary_cat":"gr-qc","submitted_at":"2007-12-15T22:40:16Z","title":"A gravitational-wave probe of effective quantum gravity"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0712.2542","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":"sha256:00ff35f3b66224d1f637abfd121ecb572983b31203161af1f3e3bcdd2f1b2292","target":"record","created_at":"2026-07-04T15:38:15Z","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":"d2fd50fff6a05c3d6819efdc2c8cedc13a6587321d38874f0df5913fb67a1b7e","cross_cats_sorted":[],"license":"","primary_cat":"gr-qc","submitted_at":"2007-12-15T22:40:16Z","title_canon_sha256":"47b2f078d0719d09d28f25a9ffafef6eb5dc6c0492ab4a8eda894c78a5d16c82"},"schema_version":"1.0","source":{"id":"0712.2542","kind":"arxiv","version":1}},"canonical_sha256":"76ea5ef175700de5021be76e76da02928aa158299fe6a8a3ebf9357164d94c20","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"76ea5ef175700de5021be76e76da02928aa158299fe6a8a3ebf9357164d94c20","first_computed_at":"2026-07-04T15:38:15.225387Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:38:15.225387Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"aXHKaEC2WIRpZXEZpde/ayqCPkTHnMAvKIR5T91xY6kXOQEoZBWCiL09pw860HkylfISUFVDi3Wo95sllMxVAQ==","signature_status":"signed_v1","signed_at":"2026-07-04T15:38:15.225960Z","signed_message":"canonical_sha256_bytes"},"source_id":"0712.2542","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:00ff35f3b66224d1f637abfd121ecb572983b31203161af1f3e3bcdd2f1b2292","sha256:0eb9bf2fc5a6c04a35f436ce8888ee941c5a967d24ad284d017f6c747abc4fe8"],"state_sha256":"df5f680bd727e24584ec948f8dbab4f18eed038a8303bd125680cee31c9ad430"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zgXYs9KpH5HgYndOwD2dItvN6qF4iQlNFk8+hEYCViLqEfiM0h5kLLuL9inFpt8Tp9roRM+7nfuYrM3RUXFPCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-25T18:01:27.211534Z","bundle_sha256":"bf35c8c6eee6670f10859c1d9b7ef852502053595e1ed6f22143090071870663"}}