{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:JELBN5LJYPI7OO5OZ354FNAGCN","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":"b9ee2e4818dcb81bd72c8e915007c9aaa966652ec9eee792995ee5bfd0a93018","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-09-05T11:49:02Z","title_canon_sha256":"06b874978dfbf392d9833b5001de821e8c364a6d6ae249c481d0335a5493e978"},"schema_version":"1.0","source":{"id":"1409.1750","kind":"arxiv","version":6}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1409.1750","created_at":"2026-05-18T02:31:46Z"},{"alias_kind":"arxiv_version","alias_value":"1409.1750v6","created_at":"2026-05-18T02:31:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1409.1750","created_at":"2026-05-18T02:31:46Z"},{"alias_kind":"pith_short_12","alias_value":"JELBN5LJYPI7","created_at":"2026-05-18T12:28:33Z"},{"alias_kind":"pith_short_16","alias_value":"JELBN5LJYPI7OO5O","created_at":"2026-05-18T12:28:33Z"},{"alias_kind":"pith_short_8","alias_value":"JELBN5LJ","created_at":"2026-05-18T12:28:33Z"}],"graph_snapshots":[{"event_id":"sha256:223fb5858edebeb7ae043b0df3c00bf6862ed28b9ca5d4475880b0f526f66e04","target":"graph","created_at":"2026-05-18T02:31:46Z","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"},"paper":{"abstract_excerpt":"The imaging sharpness of an X-ray telescope is chiefly determined by the optical quality of its focusing optics, which in turn mostly depends on the shape accuracy and the surface finishing of the grazing-incidence X-ray mirrors that compose the optical modules. To ensure the imaging performance during the mirror manufacturing, a fundamental step is predicting the mirror point spread function (PSF) from the metrology of its surface. Traditionally, the PSF computation in X-rays is assumed to be different depending on whether the surface defects are classified as figure errors or roughness. [...","authors_text":"Daniele Spiga, Lorenzo Raimondi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-09-05T11:49:02Z","title":"Mirrors for X-ray telescopes: Fresnel diffraction-based computation of point spread functions from metrology"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1409.1750","kind":"arxiv","version":6},"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":"sha256:5bbaa72c5b3690367fdab2111ad263ac6c2c0ebc961fca0bb43d5a59a6821c6d","target":"record","created_at":"2026-05-18T02:31:46Z","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":"b9ee2e4818dcb81bd72c8e915007c9aaa966652ec9eee792995ee5bfd0a93018","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-09-05T11:49:02Z","title_canon_sha256":"06b874978dfbf392d9833b5001de821e8c364a6d6ae249c481d0335a5493e978"},"schema_version":"1.0","source":{"id":"1409.1750","kind":"arxiv","version":6}},"canonical_sha256":"491616f569c3d1f73baecefbc2b4061369200352c55e3b0eca3ce925411beca3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"491616f569c3d1f73baecefbc2b4061369200352c55e3b0eca3ce925411beca3","first_computed_at":"2026-05-18T02:31:46.738365Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:31:46.738365Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0uihbgIIC6vIghU7jUv/xXGnFskxEeU9UEro9H4X3Bq12zGLBICoSunrY/O3NapEgUsCEnravLuHhWlKphuhDg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:31:46.738900Z","signed_message":"canonical_sha256_bytes"},"source_id":"1409.1750","source_kind":"arxiv","source_version":6}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5bbaa72c5b3690367fdab2111ad263ac6c2c0ebc961fca0bb43d5a59a6821c6d","sha256:223fb5858edebeb7ae043b0df3c00bf6862ed28b9ca5d4475880b0f526f66e04"],"state_sha256":"baab25ef08a652796acfd244d9b832b9cf7f8951be489d6baa4cbd6f369178dc"}