{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2010:3IY6S2CIWJYNZHWZH26YFANSZ6","short_pith_number":"pith:3IY6S2CI","schema_version":"1.0","canonical_sha256":"da31e96848b270dc9ed93ebd8281b2cfaadbabbbc42120d3d08435253d860ee1","source":{"kind":"arxiv","id":"1009.3474","version":1},"attestation_state":"computed","paper":{"title":"FFREE: a Fresnel-FRee Experiment for EPICS, the EELT planets imager","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"physics.optics","authors_text":"Alain Delboulb\\'e, Christophe V\\'erinaud, Emmanuel Aller-Carpentier, G\\'erard Zins, Jacopo Antichi, Jean-Fran\\c{c}ois Sauvage, Jean-Luc Beuzit, Markus Kasper, Norbert Hubin, Olivier Preis, Patrick Rabou, Sarah Dandy, Thierry Fusco","submitted_at":"2010-09-17T17:37:57Z","abstract_excerpt":"The purpose of FFREE - the new optical bench devoted to experiments on high-contrast imaging at LAOG - consists in the validation of algorithms based on off-line calibration techniques and adaptive optics (AO) respectively for the wavefront measurement and its compensation. The aim is the rejection of the static speckles pattern arising in a focal plane after a diffraction suppression system (based on apodization or coronagraphy) by wavefront pre-compensation. To this aim, FFREE has been optimized to minimize Fresnel propagation over a large near infrared (NIR) bandwidth in a way allowing effi"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1009.3474","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2010-09-17T17:37:57Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"6ceb340a250e1b9a561422c008313f6f9c672590343325cf89455047db5575f2","abstract_canon_sha256":"5bede0de95852c3f6a6582c50630a3da5285df61c32bcc400c4f3d32b0354254"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T07:17:50.305132Z","signature_b64":"I3RV2m/Zst2XmpVgCHoW5QYtVaFWmBUTuns+9Fl0FFRL99VFYmkRKzsLKJCfS8GV+iPCut8AfzDK2s03u5b6Cw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"da31e96848b270dc9ed93ebd8281b2cfaadbabbbc42120d3d08435253d860ee1","last_reissued_at":"2026-07-05T07:17:50.304644Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T07:17:50.304644Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"FFREE: a Fresnel-FRee Experiment for EPICS, the EELT planets imager","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"physics.optics","authors_text":"Alain Delboulb\\'e, Christophe V\\'erinaud, Emmanuel Aller-Carpentier, G\\'erard Zins, Jacopo Antichi, Jean-Fran\\c{c}ois Sauvage, Jean-Luc Beuzit, Markus Kasper, Norbert Hubin, Olivier Preis, Patrick Rabou, Sarah Dandy, Thierry Fusco","submitted_at":"2010-09-17T17:37:57Z","abstract_excerpt":"The purpose of FFREE - the new optical bench devoted to experiments on high-contrast imaging at LAOG - consists in the validation of algorithms based on off-line calibration techniques and adaptive optics (AO) respectively for the wavefront measurement and its compensation. The aim is the rejection of the static speckles pattern arising in a focal plane after a diffraction suppression system (based on apodization or coronagraphy) by wavefront pre-compensation. To this aim, FFREE has been optimized to minimize Fresnel propagation over a large near infrared (NIR) bandwidth in a way allowing effi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1009.3474","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/1009.3474/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1009.3474","created_at":"2026-07-05T07:17:50.304699+00:00"},{"alias_kind":"arxiv_version","alias_value":"1009.3474v1","created_at":"2026-07-05T07:17:50.304699+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1009.3474","created_at":"2026-07-05T07:17:50.304699+00:00"},{"alias_kind":"pith_short_12","alias_value":"3IY6S2CIWJYN","created_at":"2026-07-05T07:17:50.304699+00:00"},{"alias_kind":"pith_short_16","alias_value":"3IY6S2CIWJYNZHWZ","created_at":"2026-07-05T07:17:50.304699+00:00"},{"alias_kind":"pith_short_8","alias_value":"3IY6S2CI","created_at":"2026-07-05T07:17:50.304699+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/3IY6S2CIWJYNZHWZH26YFANSZ6","json":"https://pith.science/pith/3IY6S2CIWJYNZHWZH26YFANSZ6.json","graph_json":"https://pith.science/api/pith-number/3IY6S2CIWJYNZHWZH26YFANSZ6/graph.json","events_json":"https://pith.science/api/pith-number/3IY6S2CIWJYNZHWZH26YFANSZ6/events.json","paper":"https://pith.science/paper/3IY6S2CI"},"agent_actions":{"view_html":"https://pith.science/pith/3IY6S2CIWJYNZHWZH26YFANSZ6","download_json":"https://pith.science/pith/3IY6S2CIWJYNZHWZH26YFANSZ6.json","view_paper":"https://pith.science/paper/3IY6S2CI","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1009.3474&json=true","fetch_graph":"https://pith.science/api/pith-number/3IY6S2CIWJYNZHWZH26YFANSZ6/graph.json","fetch_events":"https://pith.science/api/pith-number/3IY6S2CIWJYNZHWZH26YFANSZ6/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/3IY6S2CIWJYNZHWZH26YFANSZ6/action/timestamp_anchor","attest_storage":"https://pith.science/pith/3IY6S2CIWJYNZHWZH26YFANSZ6/action/storage_attestation","attest_author":"https://pith.science/pith/3IY6S2CIWJYNZHWZH26YFANSZ6/action/author_attestation","sign_citation":"https://pith.science/pith/3IY6S2CIWJYNZHWZH26YFANSZ6/action/citation_signature","submit_replication":"https://pith.science/pith/3IY6S2CIWJYNZHWZH26YFANSZ6/action/replication_record"}},"created_at":"2026-07-05T07:17:50.304699+00:00","updated_at":"2026-07-05T07:17:50.304699+00:00"}