{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:AC5YQJVVSCHWMGNVANKDNXJRLN","short_pith_number":"pith:AC5YQJVV","canonical_record":{"source":{"id":"2407.17191","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2024-07-24T11:49:40Z","cross_cats_sorted":[],"title_canon_sha256":"b0ba6d44a761eb8032ea4fd910d41139c34eb5461f90c3c08bfab26ee73ae577","abstract_canon_sha256":"4210ca6142505314f9c96bdb6e80711a7b58f08e23c9273fb77a92de38d1b021"},"schema_version":"1.0"},"canonical_sha256":"00bb8826b5908f6619b5035436dd315b4f96b0066eda9b5711946cfb7762f903","source":{"kind":"arxiv","id":"2407.17191","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2407.17191","created_at":"2026-07-05T09:45:52Z"},{"alias_kind":"arxiv_version","alias_value":"2407.17191v1","created_at":"2026-07-05T09:45:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2407.17191","created_at":"2026-07-05T09:45:52Z"},{"alias_kind":"pith_short_12","alias_value":"AC5YQJVVSCHW","created_at":"2026-07-05T09:45:52Z"},{"alias_kind":"pith_short_16","alias_value":"AC5YQJVVSCHWMGNV","created_at":"2026-07-05T09:45:52Z"},{"alias_kind":"pith_short_8","alias_value":"AC5YQJVV","created_at":"2026-07-05T09:45:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:AC5YQJVVSCHWMGNVANKDNXJRLN","target":"record","payload":{"canonical_record":{"source":{"id":"2407.17191","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2024-07-24T11:49:40Z","cross_cats_sorted":[],"title_canon_sha256":"b0ba6d44a761eb8032ea4fd910d41139c34eb5461f90c3c08bfab26ee73ae577","abstract_canon_sha256":"4210ca6142505314f9c96bdb6e80711a7b58f08e23c9273fb77a92de38d1b021"},"schema_version":"1.0"},"canonical_sha256":"00bb8826b5908f6619b5035436dd315b4f96b0066eda9b5711946cfb7762f903","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T09:45:52.011187Z","signature_b64":"Ah7Cj6I5hTv146mNrsKUyPEL9BEo/wf4NveM+XznpKwTj23LCeaBBJt616uOaUKFVKrehoLbZvJNQ9DqG7A+AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"00bb8826b5908f6619b5035436dd315b4f96b0066eda9b5711946cfb7762f903","last_reissued_at":"2026-07-05T09:45:52.010697Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T09:45:52.010697Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2407.17191","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":"2026-07-05T09:45:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EuVDqdRjvfvPInXcenzS2XxTx1VLg3WNFSmbEuyMXKf+oeovMV1zBxxVsnB9B2WE+BtnlYhnrGwY8sMlUdW7CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T06:19:47.914226Z"},"content_sha256":"58174b25e068809584134eee977a8d8c74f7ad69ca87086c4042ea57dc65b3b1","schema_version":"1.0","event_id":"sha256:58174b25e068809584134eee977a8d8c74f7ad69ca87086c4042ea57dc65b3b1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:AC5YQJVVSCHWMGNVANKDNXJRLN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"VLTI Unit Telescope coud\\'e train vibration control upgrade for GRAVITY+","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Azzurra Bigioli, Babak Sedghi, Benjamin Courtney-Barrer, Denis Defr\\`ere, Dieter Lutz, Frank Eisenhauer, Fr\\'ed\\'eric Gont\\'e, Julien Woillez, Mathias Nowak, Maximilian Fabricius, Miguel Riquelme, Muhammad Salman, Nicolas Schuhler, Philippe Neuville, Pierre Bourget, Roberto Abuter, Romain Laugier, Sylvestre Lacour","submitted_at":"2024-07-24T11:49:40Z","abstract_excerpt":"Scaling up interferometry to 8m collectors should smooth-out the optical piston perturbations and allow a slow fringe tracker to obtain high precision correction on faint targets. In practice, the GRAVITY fringe tracker still observes high frequency OPD components that limit the exposure time, its precision and limiting magnitude. Perturbations seem to come from mechanical vibrations in the train of mirrors. As part of the GRAVITY+ efforts, accelerometers were added to all the mirrors of the coud\\'e train to compensate in real-time the optical path using the main delay lines. We show their eff"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2407.17191","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/2407.17191/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":"2026-07-05T09:45:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LQyhdG/+6iQcemG+VW3ZH4lA8J70nE9ucDU1nC782dUFXQqVNu1z4gF5tMzWqwjJgLW734FARLFL5x59yF6gBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T06:19:47.914624Z"},"content_sha256":"dda4ba40c5c678570aecc3a6a1057f6c35bfeeda67cc1b71d2be8739064281ac","schema_version":"1.0","event_id":"sha256:dda4ba40c5c678570aecc3a6a1057f6c35bfeeda67cc1b71d2be8739064281ac"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AC5YQJVVSCHWMGNVANKDNXJRLN/bundle.json","state_url":"https://pith.science/pith/AC5YQJVVSCHWMGNVANKDNXJRLN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AC5YQJVVSCHWMGNVANKDNXJRLN/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":"2026-07-07T06:19:47Z","links":{"resolver":"https://pith.science/pith/AC5YQJVVSCHWMGNVANKDNXJRLN","bundle":"https://pith.science/pith/AC5YQJVVSCHWMGNVANKDNXJRLN/bundle.json","state":"https://pith.science/pith/AC5YQJVVSCHWMGNVANKDNXJRLN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AC5YQJVVSCHWMGNVANKDNXJRLN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:AC5YQJVVSCHWMGNVANKDNXJRLN","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":"4210ca6142505314f9c96bdb6e80711a7b58f08e23c9273fb77a92de38d1b021","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2024-07-24T11:49:40Z","title_canon_sha256":"b0ba6d44a761eb8032ea4fd910d41139c34eb5461f90c3c08bfab26ee73ae577"},"schema_version":"1.0","source":{"id":"2407.17191","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2407.17191","created_at":"2026-07-05T09:45:52Z"},{"alias_kind":"arxiv_version","alias_value":"2407.17191v1","created_at":"2026-07-05T09:45:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2407.17191","created_at":"2026-07-05T09:45:52Z"},{"alias_kind":"pith_short_12","alias_value":"AC5YQJVVSCHW","created_at":"2026-07-05T09:45:52Z"},{"alias_kind":"pith_short_16","alias_value":"AC5YQJVVSCHWMGNV","created_at":"2026-07-05T09:45:52Z"},{"alias_kind":"pith_short_8","alias_value":"AC5YQJVV","created_at":"2026-07-05T09:45:52Z"}],"graph_snapshots":[{"event_id":"sha256:dda4ba40c5c678570aecc3a6a1057f6c35bfeeda67cc1b71d2be8739064281ac","target":"graph","created_at":"2026-07-05T09:45:52Z","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/2407.17191/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Scaling up interferometry to 8m collectors should smooth-out the optical piston perturbations and allow a slow fringe tracker to obtain high precision correction on faint targets. In practice, the GRAVITY fringe tracker still observes high frequency OPD components that limit the exposure time, its precision and limiting magnitude. Perturbations seem to come from mechanical vibrations in the train of mirrors. As part of the GRAVITY+ efforts, accelerometers were added to all the mirrors of the coud\\'e train to compensate in real-time the optical path using the main delay lines. We show their eff","authors_text":"Azzurra Bigioli, Babak Sedghi, Benjamin Courtney-Barrer, Denis Defr\\`ere, Dieter Lutz, Frank Eisenhauer, Fr\\'ed\\'eric Gont\\'e, Julien Woillez, Mathias Nowak, Maximilian Fabricius, Miguel Riquelme, Muhammad Salman, Nicolas Schuhler, Philippe Neuville, Pierre Bourget, Roberto Abuter, Romain Laugier, Sylvestre Lacour","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2024-07-24T11:49:40Z","title":"VLTI Unit Telescope coud\\'e train vibration control upgrade for GRAVITY+"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2407.17191","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":"sha256:58174b25e068809584134eee977a8d8c74f7ad69ca87086c4042ea57dc65b3b1","target":"record","created_at":"2026-07-05T09:45:52Z","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":"4210ca6142505314f9c96bdb6e80711a7b58f08e23c9273fb77a92de38d1b021","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2024-07-24T11:49:40Z","title_canon_sha256":"b0ba6d44a761eb8032ea4fd910d41139c34eb5461f90c3c08bfab26ee73ae577"},"schema_version":"1.0","source":{"id":"2407.17191","kind":"arxiv","version":1}},"canonical_sha256":"00bb8826b5908f6619b5035436dd315b4f96b0066eda9b5711946cfb7762f903","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"00bb8826b5908f6619b5035436dd315b4f96b0066eda9b5711946cfb7762f903","first_computed_at":"2026-07-05T09:45:52.010697Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T09:45:52.010697Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Ah7Cj6I5hTv146mNrsKUyPEL9BEo/wf4NveM+XznpKwTj23LCeaBBJt616uOaUKFVKrehoLbZvJNQ9DqG7A+AA==","signature_status":"signed_v1","signed_at":"2026-07-05T09:45:52.011187Z","signed_message":"canonical_sha256_bytes"},"source_id":"2407.17191","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:58174b25e068809584134eee977a8d8c74f7ad69ca87086c4042ea57dc65b3b1","sha256:dda4ba40c5c678570aecc3a6a1057f6c35bfeeda67cc1b71d2be8739064281ac"],"state_sha256":"8672b268b6714a8685abb2847f88b8b4fd1f738eba23ef1cab8e142b2b80c142"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QxT6SABUiiIexLzTW42mYz26Fm/ot0C7WtXv5OgMFWDco2NlaSnR8tOsnhd4dqqd6q9rIZqXF5GqFsKuqT+NAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T06:19:47.916866Z","bundle_sha256":"5b0c693f83b209b20e67432e437856e91ed175ca2fa5ea279cbadbb72510f1ed"}}