{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:ALLYAPF2B2GHC5S7FUCJQPVTHE","short_pith_number":"pith:ALLYAPF2","canonical_record":{"source":{"id":"0909.0010","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2009-08-31T20:01:46Z","cross_cats_sorted":[],"title_canon_sha256":"a9d4fe8c7e7806f1745e224f049aebe227b197b59676c4928f7a0dab209ed249","abstract_canon_sha256":"de6a5791b3cbf970262f0e42a6916bdd0df69ce807741113a1c115d6b2cf5062"},"schema_version":"1.0"},"canonical_sha256":"02d7803cba0e8c71765f2d04983eb3390db0126f53186b1518be1eb2e1ff95f7","source":{"kind":"arxiv","id":"0909.0010","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.0010","created_at":"2026-05-18T02:12:12Z"},{"alias_kind":"arxiv_version","alias_value":"0909.0010v1","created_at":"2026-05-18T02:12:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.0010","created_at":"2026-05-18T02:12:12Z"},{"alias_kind":"pith_short_12","alias_value":"ALLYAPF2B2GH","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"ALLYAPF2B2GHC5S7","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"ALLYAPF2","created_at":"2026-05-18T12:25:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:ALLYAPF2B2GHC5S7FUCJQPVTHE","target":"record","payload":{"canonical_record":{"source":{"id":"0909.0010","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2009-08-31T20:01:46Z","cross_cats_sorted":[],"title_canon_sha256":"a9d4fe8c7e7806f1745e224f049aebe227b197b59676c4928f7a0dab209ed249","abstract_canon_sha256":"de6a5791b3cbf970262f0e42a6916bdd0df69ce807741113a1c115d6b2cf5062"},"schema_version":"1.0"},"canonical_sha256":"02d7803cba0e8c71765f2d04983eb3390db0126f53186b1518be1eb2e1ff95f7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:12:12.498514Z","signature_b64":"eKWpTvwmFaP78ETRoHCLEhgOK8nM6rH4mUasexWbA5A/uElXu2SxAfylbl4OC44JN8g6wkgi5DyMKPzMZacBAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"02d7803cba0e8c71765f2d04983eb3390db0126f53186b1518be1eb2e1ff95f7","last_reissued_at":"2026-05-18T02:12:12.497812Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:12:12.497812Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0909.0010","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":"2026-05-18T02:12:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZBBGAON+7D0fTln2uvrecOEvxzUkJ6NXnEB+t3gdhLSaE7LzTdMF05jnaqtrk7cSWpks3HxR9M4ol2EixfW1Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T23:09:26.507939Z"},"content_sha256":"dbe8de40c5caf1f12cd69bb1afd68076a59a6a1f5fe3c3a072bc999e5e5d0bd2","schema_version":"1.0","event_id":"sha256:dbe8de40c5caf1f12cd69bb1afd68076a59a6a1f5fe3c3a072bc999e5e5d0bd2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:ALLYAPF2B2GHC5S7FUCJQPVTHE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Angular instability due to radiation pressure in the LIGO gravitational wave detector","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Daniel Sigg, Eiichi Hirose, Keita Kawabe, Peter R. Saulson, Rana Adhikari","submitted_at":"2009-08-31T20:01:46Z","abstract_excerpt":"We observed the effect of radiation pressure on the angular sensing and control system of the Laser Interferometer Gravitational-Wave Observatory (LIGO) interferometer's core optics at LIGO Hanford Observatory. This is the first measurement of this effect in a complete gravitational wave interferometer. Only one of the two angular modes survives with feedback control, since the other mode is suppressed when the control gain is sufficiently large. We developed a mathematical model to understand the physics of the system. This model matches well the dynamics that we observe."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.0010","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":"2026-05-18T02:12:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"84S2VgAooNe+rojLSJbsMrS1FYLShV8bJmg6O3pcvT2VuDR2nVktNMx5g/olr+3VtDb74W+oiAIYFtYVN0sZAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T23:09:26.508427Z"},"content_sha256":"2636d4b425038c495eaad8b35a815f8acfcda0bb064172d7e155341b2f17180c","schema_version":"1.0","event_id":"sha256:2636d4b425038c495eaad8b35a815f8acfcda0bb064172d7e155341b2f17180c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ALLYAPF2B2GHC5S7FUCJQPVTHE/bundle.json","state_url":"https://pith.science/pith/ALLYAPF2B2GHC5S7FUCJQPVTHE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ALLYAPF2B2GHC5S7FUCJQPVTHE/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":"2026-05-25T23:09:26Z","links":{"resolver":"https://pith.science/pith/ALLYAPF2B2GHC5S7FUCJQPVTHE","bundle":"https://pith.science/pith/ALLYAPF2B2GHC5S7FUCJQPVTHE/bundle.json","state":"https://pith.science/pith/ALLYAPF2B2GHC5S7FUCJQPVTHE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ALLYAPF2B2GHC5S7FUCJQPVTHE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:ALLYAPF2B2GHC5S7FUCJQPVTHE","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":"de6a5791b3cbf970262f0e42a6916bdd0df69ce807741113a1c115d6b2cf5062","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2009-08-31T20:01:46Z","title_canon_sha256":"a9d4fe8c7e7806f1745e224f049aebe227b197b59676c4928f7a0dab209ed249"},"schema_version":"1.0","source":{"id":"0909.0010","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.0010","created_at":"2026-05-18T02:12:12Z"},{"alias_kind":"arxiv_version","alias_value":"0909.0010v1","created_at":"2026-05-18T02:12:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.0010","created_at":"2026-05-18T02:12:12Z"},{"alias_kind":"pith_short_12","alias_value":"ALLYAPF2B2GH","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"ALLYAPF2B2GHC5S7","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"ALLYAPF2","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:2636d4b425038c495eaad8b35a815f8acfcda0bb064172d7e155341b2f17180c","target":"graph","created_at":"2026-05-18T02:12:12Z","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 observed the effect of radiation pressure on the angular sensing and control system of the Laser Interferometer Gravitational-Wave Observatory (LIGO) interferometer's core optics at LIGO Hanford Observatory. This is the first measurement of this effect in a complete gravitational wave interferometer. Only one of the two angular modes survives with feedback control, since the other mode is suppressed when the control gain is sufficiently large. We developed a mathematical model to understand the physics of the system. This model matches well the dynamics that we observe.","authors_text":"Daniel Sigg, Eiichi Hirose, Keita Kawabe, Peter R. Saulson, Rana Adhikari","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2009-08-31T20:01:46Z","title":"Angular instability due to radiation pressure in the LIGO gravitational wave detector"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.0010","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:dbe8de40c5caf1f12cd69bb1afd68076a59a6a1f5fe3c3a072bc999e5e5d0bd2","target":"record","created_at":"2026-05-18T02:12:12Z","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":"de6a5791b3cbf970262f0e42a6916bdd0df69ce807741113a1c115d6b2cf5062","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2009-08-31T20:01:46Z","title_canon_sha256":"a9d4fe8c7e7806f1745e224f049aebe227b197b59676c4928f7a0dab209ed249"},"schema_version":"1.0","source":{"id":"0909.0010","kind":"arxiv","version":1}},"canonical_sha256":"02d7803cba0e8c71765f2d04983eb3390db0126f53186b1518be1eb2e1ff95f7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"02d7803cba0e8c71765f2d04983eb3390db0126f53186b1518be1eb2e1ff95f7","first_computed_at":"2026-05-18T02:12:12.497812Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:12:12.497812Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eKWpTvwmFaP78ETRoHCLEhgOK8nM6rH4mUasexWbA5A/uElXu2SxAfylbl4OC44JN8g6wkgi5DyMKPzMZacBAw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:12:12.498514Z","signed_message":"canonical_sha256_bytes"},"source_id":"0909.0010","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dbe8de40c5caf1f12cd69bb1afd68076a59a6a1f5fe3c3a072bc999e5e5d0bd2","sha256:2636d4b425038c495eaad8b35a815f8acfcda0bb064172d7e155341b2f17180c"],"state_sha256":"807ce1f2a29ceb6384f12f3658bc583f3382710915b03be62a0650dae0a89021"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gnD7mdWZurkGRqET7VpxXeCGh6zAGGc3BMJo9e8wVi+W9FgqcGhbz+xi/FETQnpoYAusNdYHZ63Gs8mGQnDVBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T23:09:26.511353Z","bundle_sha256":"dbbf8133631a0c751eacad34d01ec580eca049512de0eec616b6b34a21cfeffc"}}