{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:UNKPODSG3YH6Y26PMEVO3SSO3P","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":"c35c9fdec2479563c7c60df792034750316c4d59c498c4ac59470b6843384108","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-08-07T12:49:42Z","title_canon_sha256":"3513c6e0bea5dd70326d4d4fd8821f6251a3b1a8c548c383142caf6fe90cd148"},"schema_version":"1.0","source":{"id":"1408.1567","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1408.1567","created_at":"2026-05-18T01:42:22Z"},{"alias_kind":"arxiv_version","alias_value":"1408.1567v1","created_at":"2026-05-18T01:42:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1408.1567","created_at":"2026-05-18T01:42:22Z"},{"alias_kind":"pith_short_12","alias_value":"UNKPODSG3YH6","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_16","alias_value":"UNKPODSG3YH6Y26P","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_8","alias_value":"UNKPODSG","created_at":"2026-05-18T12:28:52Z"}],"graph_snapshots":[{"event_id":"sha256:1a312ad2cdb5d43d31932f147905a084c4ce7edd0a692c2033bd9433fc4a8712","target":"graph","created_at":"2026-05-18T01:42:22Z","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":"We present the results of our project for the design and construction and on-sky test of silicon grisms. The fabrication of such devices is a complex and critical process involving litho-masking, anisotropic etching and direct bonding techniques. After the successful fabrication of the silicon grating, we have optimized the bonding of the grating onto the hypotenuse of a silicon prism to get the final prototype. After some critical phases during the experimentation a silicon grism with 363 grooves/mm and a blaze angle of 14 degrees has been eventually fabricated. The application of an A/R coat","authors_text":"Avet Harutyunyan, Carlos Riverol, Dario Lorenzetti, Elena Cianci, Fabrizio Vitali, Francesca Ghinassi, Luis Riverol, Simone Antoniucci, Vittorio Foglietti","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-08-07T12:49:42Z","title":"On-Sky Tests of an A/R Coated Silicon Grism on board NICS@TNG"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1408.1567","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":"sha256:50511f592f44bf65f97278e0341cd26b5a4ba87aa4cf10021b3164a9b6c1088e","target":"record","created_at":"2026-05-18T01:42:22Z","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":"c35c9fdec2479563c7c60df792034750316c4d59c498c4ac59470b6843384108","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-08-07T12:49:42Z","title_canon_sha256":"3513c6e0bea5dd70326d4d4fd8821f6251a3b1a8c548c383142caf6fe90cd148"},"schema_version":"1.0","source":{"id":"1408.1567","kind":"arxiv","version":1}},"canonical_sha256":"a354f70e46de0fec6bcf612aedca4edbf069adb849991615cb2ed2f41f5e84e2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a354f70e46de0fec6bcf612aedca4edbf069adb849991615cb2ed2f41f5e84e2","first_computed_at":"2026-05-18T01:42:22.929622Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:42:22.929622Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/Trpv7/nZTzmVEUq8dpCY3bwlcnU2XO1RGMa5VlGkmD08C3Dshw4bUNKeEsjfpsKZedJ2TUgQwXiDJkG14jWCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:42:22.930304Z","signed_message":"canonical_sha256_bytes"},"source_id":"1408.1567","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:50511f592f44bf65f97278e0341cd26b5a4ba87aa4cf10021b3164a9b6c1088e","sha256:1a312ad2cdb5d43d31932f147905a084c4ce7edd0a692c2033bd9433fc4a8712"],"state_sha256":"f137a0631a71c54094873da7bf2327063cd388fb083566794b047754d0316cd8"}