{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:KZQVYOBYDUUZOTAZAR2FLV6SJ3","short_pith_number":"pith:KZQVYOBY","canonical_record":{"source":{"id":"2306.13609","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2023-06-23T16:51:12Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"c197ae38bdaba8122a1bc0fca633fd6c3c5e132dd006cf66d4e02ae5a37f249e","abstract_canon_sha256":"c2222dd672c4201a23f009a476f17d06adfd7083fb339b453ca34b10a3bcdc01"},"schema_version":"1.0"},"canonical_sha256":"56615c38381d29974c19047455d7d24ee7135641e7e96d572a063313ec386584","source":{"kind":"arxiv","id":"2306.13609","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2306.13609","created_at":"2026-07-05T10:19:19Z"},{"alias_kind":"arxiv_version","alias_value":"2306.13609v2","created_at":"2026-07-05T10:19:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2306.13609","created_at":"2026-07-05T10:19:19Z"},{"alias_kind":"pith_short_12","alias_value":"KZQVYOBYDUUZ","created_at":"2026-07-05T10:19:19Z"},{"alias_kind":"pith_short_16","alias_value":"KZQVYOBYDUUZOTAZ","created_at":"2026-07-05T10:19:19Z"},{"alias_kind":"pith_short_8","alias_value":"KZQVYOBY","created_at":"2026-07-05T10:19:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:KZQVYOBYDUUZOTAZAR2FLV6SJ3","target":"record","payload":{"canonical_record":{"source":{"id":"2306.13609","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2023-06-23T16:51:12Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"c197ae38bdaba8122a1bc0fca633fd6c3c5e132dd006cf66d4e02ae5a37f249e","abstract_canon_sha256":"c2222dd672c4201a23f009a476f17d06adfd7083fb339b453ca34b10a3bcdc01"},"schema_version":"1.0"},"canonical_sha256":"56615c38381d29974c19047455d7d24ee7135641e7e96d572a063313ec386584","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:19:19.732266Z","signature_b64":"gsRWpxCMX3ORiQW9M+H+O1y4Kkc5qkWyAG40GXmp0ynw6WDtx1NKf7Vzedy9wzLgVMTrG6TsnhI/JUCqpsrkDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"56615c38381d29974c19047455d7d24ee7135641e7e96d572a063313ec386584","last_reissued_at":"2026-07-05T10:19:19.731754Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:19:19.731754Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2306.13609","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":"2026-07-05T10:19:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9JcT0B3sWfhPFUQS5biK7eELulEzgA5SVZIkYTEBUPgA9PSMR7OwggmF42gBPG7KkGmqV17m8MGb/UQMCCK+Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T17:37:42.615869Z"},"content_sha256":"eaf67f0d2696116a21707835ba86ead71967c65d7574d1ef5ff9d138de0bc1f0","schema_version":"1.0","event_id":"sha256:eaf67f0d2696116a21707835ba86ead71967c65d7574d1ef5ff9d138de0bc1f0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:KZQVYOBYDUUZOTAZAR2FLV6SJ3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Ultraviolet astronomical spectrograph calibration with laser frequency combs from nanophotonic lithium niobate waveguides","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"physics.optics","authors_text":"Bruno Chazelas, Davide Grassani, Ewelina Obrzud, Fran\\c{c}ois Bouchy, Fran\\c{c}ois Moreau, Fran\\c{c}ois Wildi, Francesco Pepe, Fuchuan Lei, Furkan Ayhan, Luis G.Villanueva, Mahmoud A. Gaafar, Markus Ludwig, Olivia Hefti, Rico Sottile, Roman Blum, Steve Lecomte, Sylvain Karlen, Thibault Voumard, Thibault Wildi, Tobias Herr, Tobias M. Schmidt, Victor Brasch, Victor Torres-Company, Zhichao Ye","submitted_at":"2023-06-23T16:51:12Z","abstract_excerpt":"Astronomical precision spectroscopy underpins searches for life beyond Earth, direct observation of the expanding Universe and constraining the potential variability of physical constants across cosmological scales. Laser frequency combs can provide the critically required accurate and precise calibration to the astronomical spectrographs. For cosmological studies, extending the calibration with such astrocombs to the ultraviolet spectral range is highly desirable, however, strong material dispersion and large spectral separation from the established infrared laser oscillators have made this e"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2306.13609","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2306.13609/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":"2026-07-05T10:19:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fblsMN61OqmFkJ5J8LoEdBg81iogVQdkzC3DQNB9o2P0ZHFhEaeQ1BSGDsCy1Zz4qRSRfCq2q0PRUMJQFYoWAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T17:37:42.616465Z"},"content_sha256":"a82bc304d26588b28dc9ea003a93b0a6f23a88e94a3d55238cbeea611f85aea3","schema_version":"1.0","event_id":"sha256:a82bc304d26588b28dc9ea003a93b0a6f23a88e94a3d55238cbeea611f85aea3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KZQVYOBYDUUZOTAZAR2FLV6SJ3/bundle.json","state_url":"https://pith.science/pith/KZQVYOBYDUUZOTAZAR2FLV6SJ3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KZQVYOBYDUUZOTAZAR2FLV6SJ3/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":"2026-08-17T17:37:42Z","links":{"resolver":"https://pith.science/pith/KZQVYOBYDUUZOTAZAR2FLV6SJ3","bundle":"https://pith.science/pith/KZQVYOBYDUUZOTAZAR2FLV6SJ3/bundle.json","state":"https://pith.science/pith/KZQVYOBYDUUZOTAZAR2FLV6SJ3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KZQVYOBYDUUZOTAZAR2FLV6SJ3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:KZQVYOBYDUUZOTAZAR2FLV6SJ3","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":"c2222dd672c4201a23f009a476f17d06adfd7083fb339b453ca34b10a3bcdc01","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2023-06-23T16:51:12Z","title_canon_sha256":"c197ae38bdaba8122a1bc0fca633fd6c3c5e132dd006cf66d4e02ae5a37f249e"},"schema_version":"1.0","source":{"id":"2306.13609","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2306.13609","created_at":"2026-07-05T10:19:19Z"},{"alias_kind":"arxiv_version","alias_value":"2306.13609v2","created_at":"2026-07-05T10:19:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2306.13609","created_at":"2026-07-05T10:19:19Z"},{"alias_kind":"pith_short_12","alias_value":"KZQVYOBYDUUZ","created_at":"2026-07-05T10:19:19Z"},{"alias_kind":"pith_short_16","alias_value":"KZQVYOBYDUUZOTAZ","created_at":"2026-07-05T10:19:19Z"},{"alias_kind":"pith_short_8","alias_value":"KZQVYOBY","created_at":"2026-07-05T10:19:19Z"}],"graph_snapshots":[{"event_id":"sha256:a82bc304d26588b28dc9ea003a93b0a6f23a88e94a3d55238cbeea611f85aea3","target":"graph","created_at":"2026-07-05T10:19:19Z","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/2306.13609/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Astronomical precision spectroscopy underpins searches for life beyond Earth, direct observation of the expanding Universe and constraining the potential variability of physical constants across cosmological scales. Laser frequency combs can provide the critically required accurate and precise calibration to the astronomical spectrographs. For cosmological studies, extending the calibration with such astrocombs to the ultraviolet spectral range is highly desirable, however, strong material dispersion and large spectral separation from the established infrared laser oscillators have made this e","authors_text":"Bruno Chazelas, Davide Grassani, Ewelina Obrzud, Fran\\c{c}ois Bouchy, Fran\\c{c}ois Moreau, Fran\\c{c}ois Wildi, Francesco Pepe, Fuchuan Lei, Furkan Ayhan, Luis G.Villanueva, Mahmoud A. Gaafar, Markus Ludwig, Olivia Hefti, Rico Sottile, Roman Blum, Steve Lecomte, Sylvain Karlen, Thibault Voumard, Thibault Wildi, Tobias Herr, Tobias M. Schmidt, Victor Brasch, Victor Torres-Company, Zhichao Ye","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2023-06-23T16:51:12Z","title":"Ultraviolet astronomical spectrograph calibration with laser frequency combs from nanophotonic lithium niobate waveguides"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2306.13609","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:eaf67f0d2696116a21707835ba86ead71967c65d7574d1ef5ff9d138de0bc1f0","target":"record","created_at":"2026-07-05T10:19:19Z","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":"c2222dd672c4201a23f009a476f17d06adfd7083fb339b453ca34b10a3bcdc01","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2023-06-23T16:51:12Z","title_canon_sha256":"c197ae38bdaba8122a1bc0fca633fd6c3c5e132dd006cf66d4e02ae5a37f249e"},"schema_version":"1.0","source":{"id":"2306.13609","kind":"arxiv","version":2}},"canonical_sha256":"56615c38381d29974c19047455d7d24ee7135641e7e96d572a063313ec386584","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"56615c38381d29974c19047455d7d24ee7135641e7e96d572a063313ec386584","first_computed_at":"2026-07-05T10:19:19.731754Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:19:19.731754Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gsRWpxCMX3ORiQW9M+H+O1y4Kkc5qkWyAG40GXmp0ynw6WDtx1NKf7Vzedy9wzLgVMTrG6TsnhI/JUCqpsrkDw==","signature_status":"signed_v1","signed_at":"2026-07-05T10:19:19.732266Z","signed_message":"canonical_sha256_bytes"},"source_id":"2306.13609","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:eaf67f0d2696116a21707835ba86ead71967c65d7574d1ef5ff9d138de0bc1f0","sha256:a82bc304d26588b28dc9ea003a93b0a6f23a88e94a3d55238cbeea611f85aea3"],"state_sha256":"924992d4a007dc325e990c03ed7e04f3ac1b4258b9ccf9e0a922c7e86c4011ea"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"33+5DM0DZtVGvRSW4lEvBzvEeIivXdHw8cSTbh1KHyZ7HgEE9MktVK0dxOuq5lYufpuO72l1bQ7X5St4afCSAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-17T17:37:42.624999Z","bundle_sha256":"f72a8cdc9fe03596f3d5cbeb9eef98ed47376eb0895967a17faa459d7523e99e"}}