{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:CQM6ZPVS2S23DX2QWAR3M75VGB","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":"bbdb8d571f66a1dbd659bbe8dca260c47f77c5e8d01607ad38ecf65e0f54c5f0","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2022-07-28T15:41:38Z","title_canon_sha256":"d386f67a4d3671ba991e1d7a9d0b8158bfbc594a98fd4b454f1964199d7f5e08"},"schema_version":"1.0","source":{"id":"2207.14177","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2207.14177","created_at":"2026-07-05T04:53:02Z"},{"alias_kind":"arxiv_version","alias_value":"2207.14177v2","created_at":"2026-07-05T04:53:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2207.14177","created_at":"2026-07-05T04:53:02Z"},{"alias_kind":"pith_short_12","alias_value":"CQM6ZPVS2S23","created_at":"2026-07-05T04:53:02Z"},{"alias_kind":"pith_short_16","alias_value":"CQM6ZPVS2S23DX2Q","created_at":"2026-07-05T04:53:02Z"},{"alias_kind":"pith_short_8","alias_value":"CQM6ZPVS","created_at":"2026-07-05T04:53:02Z"}],"graph_snapshots":[{"event_id":"sha256:58594023d08181a8da082af5b9afe7f8209042454cfda10dc5e490a80b15dd8c","target":"graph","created_at":"2026-07-05T04:53:02Z","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/2207.14177/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"RISTRETTO is the evolution of the original idea of coupling the VLT instruments SPHERE and ESPRESSO, aiming at High Dispersion Coronagraphy. RISTRETTO is a visitor instrument that should enable the characterization of the atmospheres of nearby exoplanets in reflected light, by using the technique of high-contrast, high-resolution spectroscopy. Its goal is to observe Prox Cen b and other planets placed at about 35mas from their star, i.e. 2lambda/D at lambda=750nm. The instrument is composed of an extreme adaptive optics, a coronagraphic Integral Field Unit, and a diffraction-limited spectrogra","authors_text":"A. Spang, B. Chazelas, C. Lovis, E. Hocini, I. Hughes, J.-F. Sauvage, J. Hagelberg, J. K\\\"uhn, L. Genolet, M. Beaulieu, M. Sordet, N. Blind, O. Guyon, P. Martinez, R. Schnell, T. Fusco","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2022-07-28T15:41:38Z","title":"RISTRETTO: coronagraph and AO designs enabling High Dispersion Coronagraphy at 2 lambda/D"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2207.14177","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:c2c44c58c1c9bae13d241d394218f21f2337259671137bf2a614d40429cfaead","target":"record","created_at":"2026-07-05T04:53:02Z","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":"bbdb8d571f66a1dbd659bbe8dca260c47f77c5e8d01607ad38ecf65e0f54c5f0","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2022-07-28T15:41:38Z","title_canon_sha256":"d386f67a4d3671ba991e1d7a9d0b8158bfbc594a98fd4b454f1964199d7f5e08"},"schema_version":"1.0","source":{"id":"2207.14177","kind":"arxiv","version":2}},"canonical_sha256":"1419ecbeb2d4b5b1df50b023b67fb5307e21c02990b949be0677ac82c3d90616","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1419ecbeb2d4b5b1df50b023b67fb5307e21c02990b949be0677ac82c3d90616","first_computed_at":"2026-07-05T04:53:02.675955Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:53:02.675955Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+5IVbaz0IakWMVIddwrgf5smtcjxvyC5+Xmtcf+K4wKskq++TN4PvfXkJJnJ7dnsBm9M0PtQNQ4mMzbm5L3GDg==","signature_status":"signed_v1","signed_at":"2026-07-05T04:53:02.676439Z","signed_message":"canonical_sha256_bytes"},"source_id":"2207.14177","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c2c44c58c1c9bae13d241d394218f21f2337259671137bf2a614d40429cfaead","sha256:58594023d08181a8da082af5b9afe7f8209042454cfda10dc5e490a80b15dd8c"],"state_sha256":"e16248f36165f3554793cdf44d9a8fe3fc1d825a66d8569e07c17309c4b0021c"}