{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:HHB5CXERVXTERP33OEPZUDKYRN","short_pith_number":"pith:HHB5CXER","canonical_record":{"source":{"id":"1809.05348","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-09-14T10:54:03Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"1dd905d9b55c11d3925d2e38ae5696812a1dc98fb8eafd2c59695f03017aea8b","abstract_canon_sha256":"8543ae914306a0548a1afff521d881e1af3a03436b2c7e932870d0f008ae364b"},"schema_version":"1.0"},"canonical_sha256":"39c3d15c91ade648bf7b711f9a0d588b50432f29a36e104043b9bd311047945e","source":{"kind":"arxiv","id":"1809.05348","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.05348","created_at":"2026-05-17T23:42:13Z"},{"alias_kind":"arxiv_version","alias_value":"1809.05348v2","created_at":"2026-05-17T23:42:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.05348","created_at":"2026-05-17T23:42:13Z"},{"alias_kind":"pith_short_12","alias_value":"HHB5CXERVXTE","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"HHB5CXERVXTERP33","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"HHB5CXER","created_at":"2026-05-18T12:32:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:HHB5CXERVXTERP33OEPZUDKYRN","target":"record","payload":{"canonical_record":{"source":{"id":"1809.05348","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-09-14T10:54:03Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"1dd905d9b55c11d3925d2e38ae5696812a1dc98fb8eafd2c59695f03017aea8b","abstract_canon_sha256":"8543ae914306a0548a1afff521d881e1af3a03436b2c7e932870d0f008ae364b"},"schema_version":"1.0"},"canonical_sha256":"39c3d15c91ade648bf7b711f9a0d588b50432f29a36e104043b9bd311047945e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:42:13.928388Z","signature_b64":"j+rH8yeq9x6q/nxL+6oE162cIFvUgrGr+7BS1C32bGxvUk+zCHlgZpx5d6IaNKf9wcVohXU8zsk9J9HNjRxpBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"39c3d15c91ade648bf7b711f9a0d588b50432f29a36e104043b9bd311047945e","last_reissued_at":"2026-05-17T23:42:13.927803Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:42:13.927803Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1809.05348","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:42:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"63/CooJ7yVCe9qbMOlGPFyIGOvVGYLgeiB9JInS0ekkQultz3SX3E40t6aPTvZ7qtPxLQWXKZnjyYEwZxOuCAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T15:56:36.993067Z"},"content_sha256":"e10dee31fe990899a9b670af36f8407671ca066f64800eb498de19f97a7433f4","schema_version":"1.0","event_id":"sha256:e10dee31fe990899a9b670af36f8407671ca066f64800eb498de19f97a7433f4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:HHB5CXERVXTERP33OEPZUDKYRN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Improving the Sensitivity of Advanced LIGO Using Noise Subtraction","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"astro-ph.IM","authors_text":"A. L. Urban, A. P. Lundgren, D. Davis, J. C. Driggers, L. K. Nuttall, T. J. Massinger","submitted_at":"2018-09-14T10:54:03Z","abstract_excerpt":"This paper presents an adaptable, parallelizable method for subtracting linearly coupled noise from Advanced LIGO data. We explain the features developed to ensure that the process is robust enough to handle the variability present in Advanced LIGO data. In this work, we target subtraction of noise due to beam jitter, detector calibration lines, and mains power lines. We demonstrate noise subtraction over the entirety of the second observing run, resulting in increases in sensitivity comparable to those reported in previous targeted efforts. Over the course of the second observing run, we see "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.05348","kind":"arxiv","version":2},"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":"2026-05-17T23:42:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ATTc6U2r9bviq6JKOaS2Ye2hjDgEfakmZFOFuWiHhlL/R9YsJtVG//3Qol2GZBauJifkZ4ch7W9oa07qhMOQBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T15:56:36.993802Z"},"content_sha256":"8f9dee3c4718fdcbd2b0255014b4fa7c7a92568f386dc5361a517e3cab346ca7","schema_version":"1.0","event_id":"sha256:8f9dee3c4718fdcbd2b0255014b4fa7c7a92568f386dc5361a517e3cab346ca7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HHB5CXERVXTERP33OEPZUDKYRN/bundle.json","state_url":"https://pith.science/pith/HHB5CXERVXTERP33OEPZUDKYRN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HHB5CXERVXTERP33OEPZUDKYRN/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":"2026-05-27T15:56:36Z","links":{"resolver":"https://pith.science/pith/HHB5CXERVXTERP33OEPZUDKYRN","bundle":"https://pith.science/pith/HHB5CXERVXTERP33OEPZUDKYRN/bundle.json","state":"https://pith.science/pith/HHB5CXERVXTERP33OEPZUDKYRN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HHB5CXERVXTERP33OEPZUDKYRN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:HHB5CXERVXTERP33OEPZUDKYRN","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":"8543ae914306a0548a1afff521d881e1af3a03436b2c7e932870d0f008ae364b","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-09-14T10:54:03Z","title_canon_sha256":"1dd905d9b55c11d3925d2e38ae5696812a1dc98fb8eafd2c59695f03017aea8b"},"schema_version":"1.0","source":{"id":"1809.05348","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.05348","created_at":"2026-05-17T23:42:13Z"},{"alias_kind":"arxiv_version","alias_value":"1809.05348v2","created_at":"2026-05-17T23:42:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.05348","created_at":"2026-05-17T23:42:13Z"},{"alias_kind":"pith_short_12","alias_value":"HHB5CXERVXTE","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"HHB5CXERVXTERP33","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"HHB5CXER","created_at":"2026-05-18T12:32:28Z"}],"graph_snapshots":[{"event_id":"sha256:8f9dee3c4718fdcbd2b0255014b4fa7c7a92568f386dc5361a517e3cab346ca7","target":"graph","created_at":"2026-05-17T23:42:13Z","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":"This paper presents an adaptable, parallelizable method for subtracting linearly coupled noise from Advanced LIGO data. We explain the features developed to ensure that the process is robust enough to handle the variability present in Advanced LIGO data. In this work, we target subtraction of noise due to beam jitter, detector calibration lines, and mains power lines. We demonstrate noise subtraction over the entirety of the second observing run, resulting in increases in sensitivity comparable to those reported in previous targeted efforts. Over the course of the second observing run, we see ","authors_text":"A. L. Urban, A. P. Lundgren, D. Davis, J. C. Driggers, L. K. Nuttall, T. J. Massinger","cross_cats":["gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-09-14T10:54:03Z","title":"Improving the Sensitivity of Advanced LIGO Using Noise Subtraction"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.05348","kind":"arxiv","version":2},"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:e10dee31fe990899a9b670af36f8407671ca066f64800eb498de19f97a7433f4","target":"record","created_at":"2026-05-17T23:42:13Z","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":"8543ae914306a0548a1afff521d881e1af3a03436b2c7e932870d0f008ae364b","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-09-14T10:54:03Z","title_canon_sha256":"1dd905d9b55c11d3925d2e38ae5696812a1dc98fb8eafd2c59695f03017aea8b"},"schema_version":"1.0","source":{"id":"1809.05348","kind":"arxiv","version":2}},"canonical_sha256":"39c3d15c91ade648bf7b711f9a0d588b50432f29a36e104043b9bd311047945e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"39c3d15c91ade648bf7b711f9a0d588b50432f29a36e104043b9bd311047945e","first_computed_at":"2026-05-17T23:42:13.927803Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:42:13.927803Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"j+rH8yeq9x6q/nxL+6oE162cIFvUgrGr+7BS1C32bGxvUk+zCHlgZpx5d6IaNKf9wcVohXU8zsk9J9HNjRxpBg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:42:13.928388Z","signed_message":"canonical_sha256_bytes"},"source_id":"1809.05348","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e10dee31fe990899a9b670af36f8407671ca066f64800eb498de19f97a7433f4","sha256:8f9dee3c4718fdcbd2b0255014b4fa7c7a92568f386dc5361a517e3cab346ca7"],"state_sha256":"449c2a3dbb79b83ee2b8379547ed086312973ea2d362b1f54b4a96160b73bf52"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MPF8BJLs1YIq4/hw3fuLqjKDSFiN4PRD1PYUdPvlyCam2Oj8yLvYKHP7gLNw+n++dTXlzuFWy5nshGRslviTCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T15:56:36.997580Z","bundle_sha256":"2162f9b38951b0a87aa4c086285df7e35dafec3cca5a648711866f7bc5b1138b"}}