{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:VOSVHTLQIR3WBNO7NWWRYJRRJH","short_pith_number":"pith:VOSVHTLQ","canonical_record":{"source":{"id":"1604.01456","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-04-06T00:46:47Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"c9d1132bad9330a743bfc5285c9cd536e77eecd80773d87a275504085d1a9e0d","abstract_canon_sha256":"33869541ee47185e428fb6149b3ef2a2d33c2d5f1b01ee5ffcc84093543a0de1"},"schema_version":"1.0"},"canonical_sha256":"aba553cd70447760b5df6dad1c263149fb0e651c74abc0a89d253e32022498f9","source":{"kind":"arxiv","id":"1604.01456","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.01456","created_at":"2026-05-18T01:09:29Z"},{"alias_kind":"arxiv_version","alias_value":"1604.01456v2","created_at":"2026-05-18T01:09:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.01456","created_at":"2026-05-18T01:09:29Z"},{"alias_kind":"pith_short_12","alias_value":"VOSVHTLQIR3W","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_16","alias_value":"VOSVHTLQIR3WBNO7","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_8","alias_value":"VOSVHTLQ","created_at":"2026-05-18T12:30:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:VOSVHTLQIR3WBNO7NWWRYJRRJH","target":"record","payload":{"canonical_record":{"source":{"id":"1604.01456","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-04-06T00:46:47Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"c9d1132bad9330a743bfc5285c9cd536e77eecd80773d87a275504085d1a9e0d","abstract_canon_sha256":"33869541ee47185e428fb6149b3ef2a2d33c2d5f1b01ee5ffcc84093543a0de1"},"schema_version":"1.0"},"canonical_sha256":"aba553cd70447760b5df6dad1c263149fb0e651c74abc0a89d253e32022498f9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:09:29.481934Z","signature_b64":"Dztc7VwxPRTmWjTjBme1pVgJbOrgFl/3guKGBOLPqZW47HcG1Az95p6KIeoeVwYVb8Z9/c4JorVheQcBsLWiAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"aba553cd70447760b5df6dad1c263149fb0e651c74abc0a89d253e32022498f9","last_reissued_at":"2026-05-18T01:09:29.481551Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:09:29.481551Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1604.01456","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":"2026-05-18T01:09:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dU4RSzZnaNVl24rhZlfN4+mPzpckSQKI5nPogVn4YaCx2tn00pSyae91ggZw5jLLFo4A1YGkQXHEzirNSfNnDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-23T12:37:25.463173Z"},"content_sha256":"a61cd79a6532f6c60102e89f710dac51ccffbca1b6c6049b418a6b98fdc19254","schema_version":"1.0","event_id":"sha256:a61cd79a6532f6c60102e89f710dac51ccffbca1b6c6049b418a6b98fdc19254"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:VOSVHTLQIR3WBNO7NWWRYJRRJH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Distributed State Machine Supervision for Long-baseline Gravitational-wave Detectors","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"astro-ph.IM","authors_text":"Jameson Graef Rollins","submitted_at":"2016-04-06T00:46:47Z","abstract_excerpt":"The Laser Interferometer Gravitational-wave Observatory (LIGO) consists of two identical yet independent, widely-separated, long-baseline gravitational-wave detectors. Each Advanced LIGO detector consists of complex optical-mechanical systems isolated from the ground by multiple layers of active seismic isolation, all controlled by hundreds of fast, digital, feedback control systems. This article describes a novel state machine-based automation platform developed to handle the automation and supervisory control challenges of these detectors. The platform, called \\textit{Guardian}, consists of "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.01456","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":"2026-05-18T01:09:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mJ20y89qPU60ktmFHLs65K28SFR60lwFJlwGCrxEsoyrnJLbbfPRs/w63Gl08cUPaAy6WBJQ1mDBn80lzuFJAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-23T12:37:25.463654Z"},"content_sha256":"fbb3b0a990fb176aa326d16085043a0dd1fc8776088722ff2f97561c24e27502","schema_version":"1.0","event_id":"sha256:fbb3b0a990fb176aa326d16085043a0dd1fc8776088722ff2f97561c24e27502"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VOSVHTLQIR3WBNO7NWWRYJRRJH/bundle.json","state_url":"https://pith.science/pith/VOSVHTLQIR3WBNO7NWWRYJRRJH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VOSVHTLQIR3WBNO7NWWRYJRRJH/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":"2026-06-23T12:37:25Z","links":{"resolver":"https://pith.science/pith/VOSVHTLQIR3WBNO7NWWRYJRRJH","bundle":"https://pith.science/pith/VOSVHTLQIR3WBNO7NWWRYJRRJH/bundle.json","state":"https://pith.science/pith/VOSVHTLQIR3WBNO7NWWRYJRRJH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VOSVHTLQIR3WBNO7NWWRYJRRJH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:VOSVHTLQIR3WBNO7NWWRYJRRJH","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":"33869541ee47185e428fb6149b3ef2a2d33c2d5f1b01ee5ffcc84093543a0de1","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-04-06T00:46:47Z","title_canon_sha256":"c9d1132bad9330a743bfc5285c9cd536e77eecd80773d87a275504085d1a9e0d"},"schema_version":"1.0","source":{"id":"1604.01456","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.01456","created_at":"2026-05-18T01:09:29Z"},{"alias_kind":"arxiv_version","alias_value":"1604.01456v2","created_at":"2026-05-18T01:09:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.01456","created_at":"2026-05-18T01:09:29Z"},{"alias_kind":"pith_short_12","alias_value":"VOSVHTLQIR3W","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_16","alias_value":"VOSVHTLQIR3WBNO7","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_8","alias_value":"VOSVHTLQ","created_at":"2026-05-18T12:30:48Z"}],"graph_snapshots":[{"event_id":"sha256:fbb3b0a990fb176aa326d16085043a0dd1fc8776088722ff2f97561c24e27502","target":"graph","created_at":"2026-05-18T01:09:29Z","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":"The Laser Interferometer Gravitational-wave Observatory (LIGO) consists of two identical yet independent, widely-separated, long-baseline gravitational-wave detectors. Each Advanced LIGO detector consists of complex optical-mechanical systems isolated from the ground by multiple layers of active seismic isolation, all controlled by hundreds of fast, digital, feedback control systems. This article describes a novel state machine-based automation platform developed to handle the automation and supervisory control challenges of these detectors. The platform, called \\textit{Guardian}, consists of ","authors_text":"Jameson Graef Rollins","cross_cats":["gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-04-06T00:46:47Z","title":"Distributed State Machine Supervision for Long-baseline Gravitational-wave Detectors"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.01456","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:a61cd79a6532f6c60102e89f710dac51ccffbca1b6c6049b418a6b98fdc19254","target":"record","created_at":"2026-05-18T01:09:29Z","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":"33869541ee47185e428fb6149b3ef2a2d33c2d5f1b01ee5ffcc84093543a0de1","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-04-06T00:46:47Z","title_canon_sha256":"c9d1132bad9330a743bfc5285c9cd536e77eecd80773d87a275504085d1a9e0d"},"schema_version":"1.0","source":{"id":"1604.01456","kind":"arxiv","version":2}},"canonical_sha256":"aba553cd70447760b5df6dad1c263149fb0e651c74abc0a89d253e32022498f9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"aba553cd70447760b5df6dad1c263149fb0e651c74abc0a89d253e32022498f9","first_computed_at":"2026-05-18T01:09:29.481551Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:09:29.481551Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Dztc7VwxPRTmWjTjBme1pVgJbOrgFl/3guKGBOLPqZW47HcG1Az95p6KIeoeVwYVb8Z9/c4JorVheQcBsLWiAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:09:29.481934Z","signed_message":"canonical_sha256_bytes"},"source_id":"1604.01456","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a61cd79a6532f6c60102e89f710dac51ccffbca1b6c6049b418a6b98fdc19254","sha256:fbb3b0a990fb176aa326d16085043a0dd1fc8776088722ff2f97561c24e27502"],"state_sha256":"aa7d6ce01c91fb8eb4415841bea9f08db1090cd382e675fadcabc76f25c26e36"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HZKYCUV+bhLt92YBe4+XA60Usbd48F3nkkQ7nkcE6a2q8fYFJFE9QVNAUyZYKX/z7sGz+7ddxTlwELL1+oTdCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-23T12:37:25.466254Z","bundle_sha256":"01e9dee86d808c73f5ee0041657f3431c8d04fd4ff701997e80922c2edf7acf7"}}