{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:2Z7YFQLLXNYE32CH5SI7W37HPL","short_pith_number":"pith:2Z7YFQLL","canonical_record":{"source":{"id":"1301.2974","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2013-01-14T13:50:09Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"14ebed9fe8314fb91bfacecb9449784185dec9e126b3e191e08079ac2e7ecc6a","abstract_canon_sha256":"622ac8e36301b234586897de354ee03dc8ad57d3966f23288b827c5136b91bbc"},"schema_version":"1.0"},"canonical_sha256":"d67f82c16bbb704de847ec91fb6fe77ad630e380c92798299cbebaf12e54cce9","source":{"kind":"arxiv","id":"1301.2974","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1301.2974","created_at":"2026-05-18T03:29:05Z"},{"alias_kind":"arxiv_version","alias_value":"1301.2974v2","created_at":"2026-05-18T03:29:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1301.2974","created_at":"2026-05-18T03:29:05Z"},{"alias_kind":"pith_short_12","alias_value":"2Z7YFQLLXNYE","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_16","alias_value":"2Z7YFQLLXNYE32CH","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_8","alias_value":"2Z7YFQLL","created_at":"2026-05-18T12:27:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:2Z7YFQLLXNYE32CH5SI7W37HPL","target":"record","payload":{"canonical_record":{"source":{"id":"1301.2974","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2013-01-14T13:50:09Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"14ebed9fe8314fb91bfacecb9449784185dec9e126b3e191e08079ac2e7ecc6a","abstract_canon_sha256":"622ac8e36301b234586897de354ee03dc8ad57d3966f23288b827c5136b91bbc"},"schema_version":"1.0"},"canonical_sha256":"d67f82c16bbb704de847ec91fb6fe77ad630e380c92798299cbebaf12e54cce9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:29:05.078605Z","signature_b64":"nTuxeLp9OAAMNU7FCY3DIQZqq1hqdY/XFn+OJ27Q+rj/C8hAWu7VKximKco4Yus5uLcXkTaNgYoHe9VzwAAbDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d67f82c16bbb704de847ec91fb6fe77ad630e380c92798299cbebaf12e54cce9","last_reissued_at":"2026-05-18T03:29:05.078067Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:29:05.078067Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1301.2974","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:29:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ToygJkArj5m+peVfHp/RnI+Ky2UPYX9BlSLwA9EmYgRPc8G6fUk0+dLi3tPcWbjHCckQmDuUtVvcCkFkDS6WCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T05:49:42.182643Z"},"content_sha256":"1f60baff6c361ebaf19c26c64a5a16d5431bcf699b2084f1226e9237addaad55","schema_version":"1.0","event_id":"sha256:1f60baff6c361ebaf19c26c64a5a16d5431bcf699b2084f1226e9237addaad55"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:2Z7YFQLLXNYE32CH5SI7W37HPL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"X-ray scattering of periodic and graded multilayers: comparison of experiments to simulations from surface microroughness characterization","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"physics.optics","authors_text":"B. Salmaso, D. Spiga, L. Raimondi, R. Canestrari","submitted_at":"2013-01-14T13:50:09Z","abstract_excerpt":"To enhance the reflectivity of X-ray mirrors beyond the critical angle, multilayer coatings are required. Interface imperfections in the multilayer growth process are known to cause non-specular scattering and degrade the mirror optical performance; therefore, it is important to predict the amount of X-ray scattering from the rough topography of the outer surface of the coating, which can be directly measured, e.g., with an Atomic Force Microscope (AFM). This kind of characterization, combined with X-ray reflectivity measurements to assess the deep multilayer stack structure, can be used to mo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1301.2974","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:29:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"G7P9dUF3M915ULjTKZXLK5CyZSNWrl2Z0QWRw3SO78A48POLOtbzUI+I+R1PLTRlbTCDVF59UVslwz2e3Wz2CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T05:49:42.182990Z"},"content_sha256":"23f2334e8b68cb3ff02955c10dbb6aeb98f0d85b1c5b4f86183e9cb0926a9513","schema_version":"1.0","event_id":"sha256:23f2334e8b68cb3ff02955c10dbb6aeb98f0d85b1c5b4f86183e9cb0926a9513"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2Z7YFQLLXNYE32CH5SI7W37HPL/bundle.json","state_url":"https://pith.science/pith/2Z7YFQLLXNYE32CH5SI7W37HPL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2Z7YFQLLXNYE32CH5SI7W37HPL/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-28T05:49:42Z","links":{"resolver":"https://pith.science/pith/2Z7YFQLLXNYE32CH5SI7W37HPL","bundle":"https://pith.science/pith/2Z7YFQLLXNYE32CH5SI7W37HPL/bundle.json","state":"https://pith.science/pith/2Z7YFQLLXNYE32CH5SI7W37HPL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2Z7YFQLLXNYE32CH5SI7W37HPL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:2Z7YFQLLXNYE32CH5SI7W37HPL","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":"622ac8e36301b234586897de354ee03dc8ad57d3966f23288b827c5136b91bbc","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2013-01-14T13:50:09Z","title_canon_sha256":"14ebed9fe8314fb91bfacecb9449784185dec9e126b3e191e08079ac2e7ecc6a"},"schema_version":"1.0","source":{"id":"1301.2974","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1301.2974","created_at":"2026-05-18T03:29:05Z"},{"alias_kind":"arxiv_version","alias_value":"1301.2974v2","created_at":"2026-05-18T03:29:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1301.2974","created_at":"2026-05-18T03:29:05Z"},{"alias_kind":"pith_short_12","alias_value":"2Z7YFQLLXNYE","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_16","alias_value":"2Z7YFQLLXNYE32CH","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_8","alias_value":"2Z7YFQLL","created_at":"2026-05-18T12:27:32Z"}],"graph_snapshots":[{"event_id":"sha256:23f2334e8b68cb3ff02955c10dbb6aeb98f0d85b1c5b4f86183e9cb0926a9513","target":"graph","created_at":"2026-05-18T03:29:05Z","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":"To enhance the reflectivity of X-ray mirrors beyond the critical angle, multilayer coatings are required. Interface imperfections in the multilayer growth process are known to cause non-specular scattering and degrade the mirror optical performance; therefore, it is important to predict the amount of X-ray scattering from the rough topography of the outer surface of the coating, which can be directly measured, e.g., with an Atomic Force Microscope (AFM). This kind of characterization, combined with X-ray reflectivity measurements to assess the deep multilayer stack structure, can be used to mo","authors_text":"B. Salmaso, D. Spiga, L. Raimondi, R. Canestrari","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2013-01-14T13:50:09Z","title":"X-ray scattering of periodic and graded multilayers: comparison of experiments to simulations from surface microroughness characterization"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1301.2974","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":"sha256:1f60baff6c361ebaf19c26c64a5a16d5431bcf699b2084f1226e9237addaad55","target":"record","created_at":"2026-05-18T03:29:05Z","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":"622ac8e36301b234586897de354ee03dc8ad57d3966f23288b827c5136b91bbc","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2013-01-14T13:50:09Z","title_canon_sha256":"14ebed9fe8314fb91bfacecb9449784185dec9e126b3e191e08079ac2e7ecc6a"},"schema_version":"1.0","source":{"id":"1301.2974","kind":"arxiv","version":2}},"canonical_sha256":"d67f82c16bbb704de847ec91fb6fe77ad630e380c92798299cbebaf12e54cce9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d67f82c16bbb704de847ec91fb6fe77ad630e380c92798299cbebaf12e54cce9","first_computed_at":"2026-05-18T03:29:05.078067Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:29:05.078067Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nTuxeLp9OAAMNU7FCY3DIQZqq1hqdY/XFn+OJ27Q+rj/C8hAWu7VKximKco4Yus5uLcXkTaNgYoHe9VzwAAbDA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:29:05.078605Z","signed_message":"canonical_sha256_bytes"},"source_id":"1301.2974","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1f60baff6c361ebaf19c26c64a5a16d5431bcf699b2084f1226e9237addaad55","sha256:23f2334e8b68cb3ff02955c10dbb6aeb98f0d85b1c5b4f86183e9cb0926a9513"],"state_sha256":"026a5ac35503b316757d4f7ec6c1e58a187ead5ad7d72f07d26b8040c84fbcb2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ufr6M+Ina9qMZj6iY9iJgXjqA7KlHa1/PHeTQZcoKYYW0kTbdIz9sS91lJ8AsvrPjRdXUXolvmzAyNcNR1WaBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T05:49:42.185035Z","bundle_sha256":"a9006560005baf828354c63f0037ca830bb01b8db3db7120849875d9e675229b"}}