{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:VTA5G5AD2IJKLXGUG7JGQXO4QO","short_pith_number":"pith:VTA5G5AD","canonical_record":{"source":{"id":"1704.03587","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2017-04-12T01:21:09Z","cross_cats_sorted":["astro-ph.IM","physics.optics"],"title_canon_sha256":"24343bd327deeb03c0a2269529f0bfc05b0c4f1ce8ca2d5098f28719f0dedcae","abstract_canon_sha256":"60a070e7eff1dcf2d1ad9d4b69bea3bdd7864731439ec986ecfe9db2c2d72acc"},"schema_version":"1.0"},"canonical_sha256":"acc1d37403d212a5dcd437d2685ddc83a5d7c8d78f3a9c20c61e0622d494c8f4","source":{"kind":"arxiv","id":"1704.03587","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.03587","created_at":"2026-05-18T00:46:27Z"},{"alias_kind":"arxiv_version","alias_value":"1704.03587v1","created_at":"2026-05-18T00:46:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.03587","created_at":"2026-05-18T00:46:27Z"},{"alias_kind":"pith_short_12","alias_value":"VTA5G5AD2IJK","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_16","alias_value":"VTA5G5AD2IJKLXGU","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_8","alias_value":"VTA5G5AD","created_at":"2026-05-18T12:31:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:VTA5G5AD2IJKLXGUG7JGQXO4QO","target":"record","payload":{"canonical_record":{"source":{"id":"1704.03587","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2017-04-12T01:21:09Z","cross_cats_sorted":["astro-ph.IM","physics.optics"],"title_canon_sha256":"24343bd327deeb03c0a2269529f0bfc05b0c4f1ce8ca2d5098f28719f0dedcae","abstract_canon_sha256":"60a070e7eff1dcf2d1ad9d4b69bea3bdd7864731439ec986ecfe9db2c2d72acc"},"schema_version":"1.0"},"canonical_sha256":"acc1d37403d212a5dcd437d2685ddc83a5d7c8d78f3a9c20c61e0622d494c8f4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:46:27.421308Z","signature_b64":"+3FrgelNGR2O/TldA8a6UxZpcX8VreJeHvNB0i1XX703vSkY6K2bmbhi8Ewu6kSCtEMj8gFgToSAaeVH7dW3AQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"acc1d37403d212a5dcd437d2685ddc83a5d7c8d78f3a9c20c61e0622d494c8f4","last_reissued_at":"2026-05-18T00:46:27.420645Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:46:27.420645Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1704.03587","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":"2026-05-18T00:46:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rINADBpAQ8MkWxh4hD6FMiyAAwSNr10kk8sltVaP1nryxxLsFl9YeWqXx0jgWmAKfrTA/jkv9X9t4U5MpoCBBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T23:08:59.984564Z"},"content_sha256":"dba6f5da46fe0f145abe27663975de2766ae57c32030cce727d18ff422efb76f","schema_version":"1.0","event_id":"sha256:dba6f5da46fe0f145abe27663975de2766ae57c32030cce727d18ff422efb76f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:VTA5G5AD2IJKLXGUG7JGQXO4QO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Damping parametric instabilities in future gravitational wave detectors by means of electrostatic actuators","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM","physics.optics"],"primary_cat":"physics.ins-det","authors_text":"Brett Shapiro, Calum Torrie, John Miller, Jonathan Soto, Lisa Barsotti, Matthew Evans, Myron Macinnis, Peter Fritschel, Richard Mittleman","submitted_at":"2017-04-12T01:21:09Z","abstract_excerpt":"It has been suggested that the next generation of interferometric gravitational wave detectors may observe spontaneously excited parametric oscillatory instabilities. We present a method of actively suppressing any such instability through application of electrostatic forces to the interferometers' test masses. Using numerical methods we quantify the actuation force required to damp candidate instabilities and find that such forces are readily achievable. Our predictions are subsequently verified experimentally using prototype Advanced LIGO hardware, conclusively demonstrating the effectivenes"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.03587","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":"2026-05-18T00:46:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sFag1q4Wa18spcTlMcy79ZAeKcslfD1o0GkDV0ac5m2BBj09oIT8Dl2PTdaGu9WvZzsq8YZdBGEWSIE0+51dBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T23:08:59.985213Z"},"content_sha256":"bbea577401781caec4b6fd73193202747951771d48826b34cace9b8a9255fa58","schema_version":"1.0","event_id":"sha256:bbea577401781caec4b6fd73193202747951771d48826b34cace9b8a9255fa58"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VTA5G5AD2IJKLXGUG7JGQXO4QO/bundle.json","state_url":"https://pith.science/pith/VTA5G5AD2IJKLXGUG7JGQXO4QO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VTA5G5AD2IJKLXGUG7JGQXO4QO/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":"2026-05-28T23:08:59Z","links":{"resolver":"https://pith.science/pith/VTA5G5AD2IJKLXGUG7JGQXO4QO","bundle":"https://pith.science/pith/VTA5G5AD2IJKLXGUG7JGQXO4QO/bundle.json","state":"https://pith.science/pith/VTA5G5AD2IJKLXGUG7JGQXO4QO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VTA5G5AD2IJKLXGUG7JGQXO4QO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:VTA5G5AD2IJKLXGUG7JGQXO4QO","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":"60a070e7eff1dcf2d1ad9d4b69bea3bdd7864731439ec986ecfe9db2c2d72acc","cross_cats_sorted":["astro-ph.IM","physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2017-04-12T01:21:09Z","title_canon_sha256":"24343bd327deeb03c0a2269529f0bfc05b0c4f1ce8ca2d5098f28719f0dedcae"},"schema_version":"1.0","source":{"id":"1704.03587","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.03587","created_at":"2026-05-18T00:46:27Z"},{"alias_kind":"arxiv_version","alias_value":"1704.03587v1","created_at":"2026-05-18T00:46:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.03587","created_at":"2026-05-18T00:46:27Z"},{"alias_kind":"pith_short_12","alias_value":"VTA5G5AD2IJK","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_16","alias_value":"VTA5G5AD2IJKLXGU","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_8","alias_value":"VTA5G5AD","created_at":"2026-05-18T12:31:49Z"}],"graph_snapshots":[{"event_id":"sha256:bbea577401781caec4b6fd73193202747951771d48826b34cace9b8a9255fa58","target":"graph","created_at":"2026-05-18T00:46:27Z","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":"It has been suggested that the next generation of interferometric gravitational wave detectors may observe spontaneously excited parametric oscillatory instabilities. We present a method of actively suppressing any such instability through application of electrostatic forces to the interferometers' test masses. Using numerical methods we quantify the actuation force required to damp candidate instabilities and find that such forces are readily achievable. Our predictions are subsequently verified experimentally using prototype Advanced LIGO hardware, conclusively demonstrating the effectivenes","authors_text":"Brett Shapiro, Calum Torrie, John Miller, Jonathan Soto, Lisa Barsotti, Matthew Evans, Myron Macinnis, Peter Fritschel, Richard Mittleman","cross_cats":["astro-ph.IM","physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2017-04-12T01:21:09Z","title":"Damping parametric instabilities in future gravitational wave detectors by means of electrostatic actuators"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.03587","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:dba6f5da46fe0f145abe27663975de2766ae57c32030cce727d18ff422efb76f","target":"record","created_at":"2026-05-18T00:46:27Z","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":"60a070e7eff1dcf2d1ad9d4b69bea3bdd7864731439ec986ecfe9db2c2d72acc","cross_cats_sorted":["astro-ph.IM","physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2017-04-12T01:21:09Z","title_canon_sha256":"24343bd327deeb03c0a2269529f0bfc05b0c4f1ce8ca2d5098f28719f0dedcae"},"schema_version":"1.0","source":{"id":"1704.03587","kind":"arxiv","version":1}},"canonical_sha256":"acc1d37403d212a5dcd437d2685ddc83a5d7c8d78f3a9c20c61e0622d494c8f4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"acc1d37403d212a5dcd437d2685ddc83a5d7c8d78f3a9c20c61e0622d494c8f4","first_computed_at":"2026-05-18T00:46:27.420645Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:46:27.420645Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+3FrgelNGR2O/TldA8a6UxZpcX8VreJeHvNB0i1XX703vSkY6K2bmbhi8Ewu6kSCtEMj8gFgToSAaeVH7dW3AQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:46:27.421308Z","signed_message":"canonical_sha256_bytes"},"source_id":"1704.03587","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dba6f5da46fe0f145abe27663975de2766ae57c32030cce727d18ff422efb76f","sha256:bbea577401781caec4b6fd73193202747951771d48826b34cace9b8a9255fa58"],"state_sha256":"c6a7986c93363cb723e835d3dbfe6463bca8e339b84f04fb50c6fcd0730fdc3a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eenE2nfaK4F3SdPTAF0/9547tmzKOcA+u1Yo7mu7A+PxEm3y3g/J1oRPDystnkObPIcY9D4O0xl9gHLlv2ILBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T23:08:59.988425Z","bundle_sha256":"698a678a107f5619940d22448f9b0f8a05df1b2c611364d98021ab52d1e29ade"}}