{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:XQLC6Z257PG4WQGX5SDM2BFA7K","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":"e76c08d8688ec988a97ff1c9c646c4dfe1c3c3fc3989d3772d5e34f1d204803a","cross_cats_sorted":["astro-ph.IM","astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2025-09-03T14:01:40Z","title_canon_sha256":"ca38c883773f8b5f5f9553f29fe846a53e6768de706bd6e0abd5f58383aed6b3"},"schema_version":"1.0","source":{"id":"2509.03325","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2509.03325","created_at":"2026-07-05T12:04:20Z"},{"alias_kind":"arxiv_version","alias_value":"2509.03325v1","created_at":"2026-07-05T12:04:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2509.03325","created_at":"2026-07-05T12:04:20Z"},{"alias_kind":"pith_short_12","alias_value":"XQLC6Z257PG4","created_at":"2026-07-05T12:04:20Z"},{"alias_kind":"pith_short_16","alias_value":"XQLC6Z257PG4WQGX","created_at":"2026-07-05T12:04:20Z"},{"alias_kind":"pith_short_8","alias_value":"XQLC6Z25","created_at":"2026-07-05T12:04:20Z"}],"graph_snapshots":[{"event_id":"sha256:6ece617322b47d7d872156c4bdf819c715b1a3cf68620dd8949a7318583ac75c","target":"graph","created_at":"2026-07-05T12:04:20Z","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/2509.03325/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The direct detection of circumstellar discs through high-contrast imaging provides key insights into the history and dynamics of planetary systems. Pole-on discs, especially faint debris discs, are difficult to detect and require careful consideration during post-processing to remove stellar residuals from the data while preserving the disc signal. Reference-star differential imaging (RDI) serves as one of the primary post-processing methods for disc observations. We aim to develop a method of reference frame selection that is optimised for the reduction of pole-on discs. Method: We performed ","authors_text":"A.-M. Lagrange, J. Mazoyer, J. Milli, S. Bergeon, S. Stasevic","cross_cats":["astro-ph.IM","astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2025-09-03T14:01:40Z","title":"Optimising reference library selection for reference-star differential imaging of discs with SPHERE/IRDIS"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2509.03325","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":"sha256:85f05dba7902f44beecec94c52e64150e6c1dc6752ef003505b2b665f2e1bd5e","target":"record","created_at":"2026-07-05T12:04:20Z","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":"e76c08d8688ec988a97ff1c9c646c4dfe1c3c3fc3989d3772d5e34f1d204803a","cross_cats_sorted":["astro-ph.IM","astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2025-09-03T14:01:40Z","title_canon_sha256":"ca38c883773f8b5f5f9553f29fe846a53e6768de706bd6e0abd5f58383aed6b3"},"schema_version":"1.0","source":{"id":"2509.03325","kind":"arxiv","version":1}},"canonical_sha256":"bc162f675dfbcdcb40d7ec86cd04a0fa8d60f21c70825909eba99392878f735e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bc162f675dfbcdcb40d7ec86cd04a0fa8d60f21c70825909eba99392878f735e","first_computed_at":"2026-07-05T12:04:20.463710Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T12:04:20.463710Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zMxr+DtAoD9RhDRtDG4p82nSVsrt8p599HCj5J+BZd173DPu31nmDy4HMlax5sGsgb5H7yGV7PvMo6Ne7nA9Aw==","signature_status":"signed_v1","signed_at":"2026-07-05T12:04:20.464206Z","signed_message":"canonical_sha256_bytes"},"source_id":"2509.03325","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:85f05dba7902f44beecec94c52e64150e6c1dc6752ef003505b2b665f2e1bd5e","sha256:6ece617322b47d7d872156c4bdf819c715b1a3cf68620dd8949a7318583ac75c"],"state_sha256":"7eeb58397c2cb644e987b726ce9cf9458a59b3f9f2e3dd9a4cc3393c4cb6ad43"}