{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:GCLDTCB73XOTTSDI6ODVIP55OC","short_pith_number":"pith:GCLDTCB7","canonical_record":{"source":{"id":"2606.24179","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2026-06-23T06:03:16Z","cross_cats_sorted":[],"title_canon_sha256":"8430b7a71a09dd641751403bf0ce5389005041d01a70e1dcb04f4b4611c769d3","abstract_canon_sha256":"52ef47335a2829be02485636440b26f200a5515940b7a7060923ecec940b9a6c"},"schema_version":"1.0"},"canonical_sha256":"309639883fdddd39c868f387543fbd70bdec61ee0edd6dd74c2e601066a47440","source":{"kind":"arxiv","id":"2606.24179","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.24179","created_at":"2026-06-24T01:14:44Z"},{"alias_kind":"arxiv_version","alias_value":"2606.24179v1","created_at":"2026-06-24T01:14:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.24179","created_at":"2026-06-24T01:14:44Z"},{"alias_kind":"pith_short_12","alias_value":"GCLDTCB73XOT","created_at":"2026-06-24T01:14:44Z"},{"alias_kind":"pith_short_16","alias_value":"GCLDTCB73XOTTSDI","created_at":"2026-06-24T01:14:44Z"},{"alias_kind":"pith_short_8","alias_value":"GCLDTCB7","created_at":"2026-06-24T01:14:44Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:GCLDTCB73XOTTSDI6ODVIP55OC","target":"record","payload":{"canonical_record":{"source":{"id":"2606.24179","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2026-06-23T06:03:16Z","cross_cats_sorted":[],"title_canon_sha256":"8430b7a71a09dd641751403bf0ce5389005041d01a70e1dcb04f4b4611c769d3","abstract_canon_sha256":"52ef47335a2829be02485636440b26f200a5515940b7a7060923ecec940b9a6c"},"schema_version":"1.0"},"canonical_sha256":"309639883fdddd39c868f387543fbd70bdec61ee0edd6dd74c2e601066a47440","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-24T01:14:44.167363Z","signature_b64":"XdxfIyhF1d8pYPWbEK7X/WRBZ18vP3ouWSkhsdtUxJd1N52lkeYVvVC0UHq05E5OtUpN8ZcgObTpzbsNpMsjCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"309639883fdddd39c868f387543fbd70bdec61ee0edd6dd74c2e601066a47440","last_reissued_at":"2026-06-24T01:14:44.166685Z","signature_status":"signed_v1","first_computed_at":"2026-06-24T01:14:44.166685Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2606.24179","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-06-24T01:14:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5KQpfYnSnZVFHnzUsKW6o5ckRbmBCX531do6EY4W5Nuso7OdIdmb6N894+tFDGJNUfZNBLsmWVkZLi147AHoCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T00:56:49.133585Z"},"content_sha256":"c64ae6e2109e7934d1a2c594a4f7de93654ea09c5b25a6dd30ac7ab5b477d072","schema_version":"1.0","event_id":"sha256:c64ae6e2109e7934d1a2c594a4f7de93654ea09c5b25a6dd30ac7ab5b477d072"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:GCLDTCB73XOTTSDI6ODVIP55OC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Widefield Spectroscopic Telescope (WST): coating strategy to achieve high optical throughput","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Benoit Sassolas, Christophe Michel, Corentin Cudennec, Laurent Pinard, Matthieu Coulon, Philippe Dierickx, Roland Bacon","submitted_at":"2026-06-23T06:03:16Z","abstract_excerpt":"The Wide-field Spectroscopic Telescope (WST) is a 12-m class facility designed for simultaneous wide-field multi-object and integral-field spectroscopy across 370-1600 nm, targeting a throughput above 83% its wide-field focus and 76% at its integral field one. Its 13 mirrors and 5 lenses require optimized coatings balancing feasibility, operational needs, and long-term durability. Large mirrors (>2 m) may use enhanced metallic coatings, such as the protected-silver solution from the Vera C. Rubin Observatory, achieving over 90% reflectivity in UV and above 99% in NIR. Smaller mirrors would use"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.24179","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2606.24179/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-06-24T01:14:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KsrQxablac3drB60sVoou5HGk1AhKF2QW/0iIjfTRXcuee1xJijiZPP0/dP6GMPvEX2OvR8I+G6/1ieog5RCCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T00:56:49.133955Z"},"content_sha256":"328da8e66c31022d3754321a7cc1d6709671abd9488ecaba429e9ad963431d87","schema_version":"1.0","event_id":"sha256:328da8e66c31022d3754321a7cc1d6709671abd9488ecaba429e9ad963431d87"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GCLDTCB73XOTTSDI6ODVIP55OC/bundle.json","state_url":"https://pith.science/pith/GCLDTCB73XOTTSDI6ODVIP55OC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GCLDTCB73XOTTSDI6ODVIP55OC/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":"2026-06-27T00:56:49Z","links":{"resolver":"https://pith.science/pith/GCLDTCB73XOTTSDI6ODVIP55OC","bundle":"https://pith.science/pith/GCLDTCB73XOTTSDI6ODVIP55OC/bundle.json","state":"https://pith.science/pith/GCLDTCB73XOTTSDI6ODVIP55OC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GCLDTCB73XOTTSDI6ODVIP55OC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:GCLDTCB73XOTTSDI6ODVIP55OC","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":"52ef47335a2829be02485636440b26f200a5515940b7a7060923ecec940b9a6c","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2026-06-23T06:03:16Z","title_canon_sha256":"8430b7a71a09dd641751403bf0ce5389005041d01a70e1dcb04f4b4611c769d3"},"schema_version":"1.0","source":{"id":"2606.24179","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.24179","created_at":"2026-06-24T01:14:44Z"},{"alias_kind":"arxiv_version","alias_value":"2606.24179v1","created_at":"2026-06-24T01:14:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.24179","created_at":"2026-06-24T01:14:44Z"},{"alias_kind":"pith_short_12","alias_value":"GCLDTCB73XOT","created_at":"2026-06-24T01:14:44Z"},{"alias_kind":"pith_short_16","alias_value":"GCLDTCB73XOTTSDI","created_at":"2026-06-24T01:14:44Z"},{"alias_kind":"pith_short_8","alias_value":"GCLDTCB7","created_at":"2026-06-24T01:14:44Z"}],"graph_snapshots":[{"event_id":"sha256:328da8e66c31022d3754321a7cc1d6709671abd9488ecaba429e9ad963431d87","target":"graph","created_at":"2026-06-24T01:14:44Z","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/2606.24179/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The Wide-field Spectroscopic Telescope (WST) is a 12-m class facility designed for simultaneous wide-field multi-object and integral-field spectroscopy across 370-1600 nm, targeting a throughput above 83% its wide-field focus and 76% at its integral field one. Its 13 mirrors and 5 lenses require optimized coatings balancing feasibility, operational needs, and long-term durability. Large mirrors (>2 m) may use enhanced metallic coatings, such as the protected-silver solution from the Vera C. Rubin Observatory, achieving over 90% reflectivity in UV and above 99% in NIR. Smaller mirrors would use","authors_text":"Benoit Sassolas, Christophe Michel, Corentin Cudennec, Laurent Pinard, Matthieu Coulon, Philippe Dierickx, Roland Bacon","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2026-06-23T06:03:16Z","title":"Widefield Spectroscopic Telescope (WST): coating strategy to achieve high optical throughput"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.24179","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:c64ae6e2109e7934d1a2c594a4f7de93654ea09c5b25a6dd30ac7ab5b477d072","target":"record","created_at":"2026-06-24T01:14:44Z","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":"52ef47335a2829be02485636440b26f200a5515940b7a7060923ecec940b9a6c","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2026-06-23T06:03:16Z","title_canon_sha256":"8430b7a71a09dd641751403bf0ce5389005041d01a70e1dcb04f4b4611c769d3"},"schema_version":"1.0","source":{"id":"2606.24179","kind":"arxiv","version":1}},"canonical_sha256":"309639883fdddd39c868f387543fbd70bdec61ee0edd6dd74c2e601066a47440","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"309639883fdddd39c868f387543fbd70bdec61ee0edd6dd74c2e601066a47440","first_computed_at":"2026-06-24T01:14:44.166685Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-24T01:14:44.166685Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XdxfIyhF1d8pYPWbEK7X/WRBZ18vP3ouWSkhsdtUxJd1N52lkeYVvVC0UHq05E5OtUpN8ZcgObTpzbsNpMsjCQ==","signature_status":"signed_v1","signed_at":"2026-06-24T01:14:44.167363Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.24179","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c64ae6e2109e7934d1a2c594a4f7de93654ea09c5b25a6dd30ac7ab5b477d072","sha256:328da8e66c31022d3754321a7cc1d6709671abd9488ecaba429e9ad963431d87"],"state_sha256":"33f7df346450807ba75eedd94427541b0a92740cc08de3d5c063f5146eac5100"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LRlp/Nhaf/ddOMvr3ZeLkYXCgvdjVqEDhzlLd8O8LQjdG8Qd/WtMC9y8GpMy59svqjUekc88qjREj87e9z4SDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-27T00:56:49.136069Z","bundle_sha256":"051025038e128990c131fec8cd74e39d6825e03a01d70ec236a2f222d7759623"}}