{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:J67NQNV6IIV5LS7PP6H5ADVHSM","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":"e6dd6ed25f1d49dcf74d4d71aa405fa068737facedbf789127771b40079e904b","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.EP","submitted_at":"2025-04-28T14:08:38Z","title_canon_sha256":"78c4f8df4b053bed4e0d48810f267679e9f8e110d5861612aa4d2cbbbc403e17"},"schema_version":"1.0","source":{"id":"2504.19810","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2504.19810","created_at":"2026-07-05T10:55:03Z"},{"alias_kind":"arxiv_version","alias_value":"2504.19810v1","created_at":"2026-07-05T10:55:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2504.19810","created_at":"2026-07-05T10:55:03Z"},{"alias_kind":"pith_short_12","alias_value":"J67NQNV6IIV5","created_at":"2026-07-05T10:55:03Z"},{"alias_kind":"pith_short_16","alias_value":"J67NQNV6IIV5LS7P","created_at":"2026-07-05T10:55:03Z"},{"alias_kind":"pith_short_8","alias_value":"J67NQNV6","created_at":"2026-07-05T10:55:03Z"}],"graph_snapshots":[{"event_id":"sha256:5c1c17526a4d906a8eaa720d2df7b8d1ccc121eb1d9ff551b3c66c04509361ac","target":"graph","created_at":"2026-07-05T10:55:03Z","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/2504.19810/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present high-contrast imaging observations of seven protoplanetary disks at 4um using the ERIS on the VLT. This study focuses on detecting scattered light from micron-sized dust particles and assessing the potential of the vAPP coronagraph for disk and planet characterization. Observations were performed in pupil-stabilized mode with the vAPP coronagraph. Data were reduced using reference differential imaging and angular differential imaging techniques, incorporating principal component analysis for point-source detection. Contrast curves and detection limits were computed for planetary com","authors_text":"A. Garufi, A. Zurlo, C. Codella, C. Lazzoni, C. Toci, D. Fedele, D. Mesa, E. Rigliaco, F. Maio, F. Pedichini, G. Lodato, L. . Pino, L. Podio, L. Testi, R.G. Gratton, S. Antoniucci, S. Desidera, S. Facchini, V. D'Orazi, V. Roccatagliata","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.EP","submitted_at":"2025-04-28T14:08:38Z","title":"Protoplanetary disk insights from the first ERIS/APP survey at 4 {\\mu}m"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2504.19810","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:ca0d78d5d51b3fe6b89e2a57e8cc7827c9893bfc89d46c965bf44aa2dc4f3b91","target":"record","created_at":"2026-07-05T10:55:03Z","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":"e6dd6ed25f1d49dcf74d4d71aa405fa068737facedbf789127771b40079e904b","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.EP","submitted_at":"2025-04-28T14:08:38Z","title_canon_sha256":"78c4f8df4b053bed4e0d48810f267679e9f8e110d5861612aa4d2cbbbc403e17"},"schema_version":"1.0","source":{"id":"2504.19810","kind":"arxiv","version":1}},"canonical_sha256":"4fbed836be422bd5cbef7f8fd00ea7930b23c580aee50ad3afe4bcdf822dbe2c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4fbed836be422bd5cbef7f8fd00ea7930b23c580aee50ad3afe4bcdf822dbe2c","first_computed_at":"2026-07-05T10:55:03.495588Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:55:03.495588Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"06kwXFiV+Hn6OZSCUu0+R0AqO+dvq1jUbsFhWtfJtzvVo8N6+tW64bp8fIsaiw0rBGlDOkzpYV09EIH8CJl5AA==","signature_status":"signed_v1","signed_at":"2026-07-05T10:55:03.496048Z","signed_message":"canonical_sha256_bytes"},"source_id":"2504.19810","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ca0d78d5d51b3fe6b89e2a57e8cc7827c9893bfc89d46c965bf44aa2dc4f3b91","sha256:5c1c17526a4d906a8eaa720d2df7b8d1ccc121eb1d9ff551b3c66c04509361ac"],"state_sha256":"7531dcf303bf306ab47ba88f85812c1c9e5d389f1bc9ffeeb1dfc14507ec4369"}