{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:2MXV66YBGF4F4O3XFXGPP3WDQY","short_pith_number":"pith:2MXV66YB","canonical_record":{"source":{"id":"2410.04863","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2024-10-07T09:27:31Z","cross_cats_sorted":[],"title_canon_sha256":"b8be1ab0cc75830f49cfe14c6706b60faf76a790ec32e0ef01f2e21d73a7ded9","abstract_canon_sha256":"f09eadef4ad54644af1d7774cf85623b7d120906ddc5e860df5b573ba7ced919"},"schema_version":"1.0"},"canonical_sha256":"d32f5f7b0131785e3b772dccf7eec386180f6858707ff32a225db17cae09e858","source":{"kind":"arxiv","id":"2410.04863","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2410.04863","created_at":"2026-07-05T09:16:57Z"},{"alias_kind":"arxiv_version","alias_value":"2410.04863v1","created_at":"2026-07-05T09:16:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2410.04863","created_at":"2026-07-05T09:16:57Z"},{"alias_kind":"pith_short_12","alias_value":"2MXV66YBGF4F","created_at":"2026-07-05T09:16:57Z"},{"alias_kind":"pith_short_16","alias_value":"2MXV66YBGF4F4O3X","created_at":"2026-07-05T09:16:57Z"},{"alias_kind":"pith_short_8","alias_value":"2MXV66YB","created_at":"2026-07-05T09:16:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:2MXV66YBGF4F4O3XFXGPP3WDQY","target":"record","payload":{"canonical_record":{"source":{"id":"2410.04863","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2024-10-07T09:27:31Z","cross_cats_sorted":[],"title_canon_sha256":"b8be1ab0cc75830f49cfe14c6706b60faf76a790ec32e0ef01f2e21d73a7ded9","abstract_canon_sha256":"f09eadef4ad54644af1d7774cf85623b7d120906ddc5e860df5b573ba7ced919"},"schema_version":"1.0"},"canonical_sha256":"d32f5f7b0131785e3b772dccf7eec386180f6858707ff32a225db17cae09e858","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T09:16:57.389029Z","signature_b64":"Ob7wjN0LaHRmzIIWzbs9ZEYBGdtASTO7W+9DH00tUk1NnGIMma+Lxx1iJWZn9t5D/wJWA4UrMkK7tGPIrsAxBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d32f5f7b0131785e3b772dccf7eec386180f6858707ff32a225db17cae09e858","last_reissued_at":"2026-07-05T09:16:57.388557Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T09:16:57.388557Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2410.04863","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":"2026-07-05T09:16:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rt+Bw4D9jgHAFhkHkqprm5dG7p6ZSRf6lsAk7mRZkvl2sR2CcvScGnDnLNy3MRGm53yB5fhkQH76yexmIasmAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T22:58:34.444586Z"},"content_sha256":"09bc29925b072db11bcd5b4f7b16fc16dbed1544ec049db5171226d8bca19385","schema_version":"1.0","event_id":"sha256:09bc29925b072db11bcd5b4f7b16fc16dbed1544ec049db5171226d8bca19385"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:2MXV66YBGF4F4O3XFXGPP3WDQY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Performance comparison of the Shack-Hartmann and pyramid wavefront sensors with a laser guide star for 40 m telescopes","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Benoit Neichel, Cedric-Taissir Heritier, Francisco Oyarzun, Paul Rouquette, Thierry Fusco, Vincent Chambouleyron","submitted_at":"2024-10-07T09:27:31Z","abstract_excerpt":"Context. The new giant segmented mirror telescopes will use laser guide stars (LGS) for their adaptive optics (AO) systems. Two options to use as wavefront sensors (WFS) are the Shack-Hartmann wavefront sensor (SHWFS) and the pyramid wavefront sensor (PWFS). Aims. In this paper, we compare the noise performance of the PWFS and the SHWFS. We aim to find which of the two WFS is the best to use in a single or tomographic configuration. Methods. To compute the noise performance we extended a noise model developed for the PWFS to be used with the SHWFS. To do this, we expressed the centroiding algo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2410.04863","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/2410.04863/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":"2026-07-05T09:16:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TmO0/4H/LjUTy8NvaFeNW47P0aBb6QmjRSBzZMK/m7bRNkLyAhibytkORgtq3QsHwzPesXOnuGh5YnaxYQ4IDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T22:58:34.445104Z"},"content_sha256":"9b5b3807115e24d1a111386102b3bad3907c7da7b44f455ebd4f87ff00dc60e4","schema_version":"1.0","event_id":"sha256:9b5b3807115e24d1a111386102b3bad3907c7da7b44f455ebd4f87ff00dc60e4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2MXV66YBGF4F4O3XFXGPP3WDQY/bundle.json","state_url":"https://pith.science/pith/2MXV66YBGF4F4O3XFXGPP3WDQY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2MXV66YBGF4F4O3XFXGPP3WDQY/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":"2026-08-05T22:58:34Z","links":{"resolver":"https://pith.science/pith/2MXV66YBGF4F4O3XFXGPP3WDQY","bundle":"https://pith.science/pith/2MXV66YBGF4F4O3XFXGPP3WDQY/bundle.json","state":"https://pith.science/pith/2MXV66YBGF4F4O3XFXGPP3WDQY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2MXV66YBGF4F4O3XFXGPP3WDQY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:2MXV66YBGF4F4O3XFXGPP3WDQY","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":"f09eadef4ad54644af1d7774cf85623b7d120906ddc5e860df5b573ba7ced919","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2024-10-07T09:27:31Z","title_canon_sha256":"b8be1ab0cc75830f49cfe14c6706b60faf76a790ec32e0ef01f2e21d73a7ded9"},"schema_version":"1.0","source":{"id":"2410.04863","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2410.04863","created_at":"2026-07-05T09:16:57Z"},{"alias_kind":"arxiv_version","alias_value":"2410.04863v1","created_at":"2026-07-05T09:16:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2410.04863","created_at":"2026-07-05T09:16:57Z"},{"alias_kind":"pith_short_12","alias_value":"2MXV66YBGF4F","created_at":"2026-07-05T09:16:57Z"},{"alias_kind":"pith_short_16","alias_value":"2MXV66YBGF4F4O3X","created_at":"2026-07-05T09:16:57Z"},{"alias_kind":"pith_short_8","alias_value":"2MXV66YB","created_at":"2026-07-05T09:16:57Z"}],"graph_snapshots":[{"event_id":"sha256:9b5b3807115e24d1a111386102b3bad3907c7da7b44f455ebd4f87ff00dc60e4","target":"graph","created_at":"2026-07-05T09:16:57Z","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/2410.04863/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Context. The new giant segmented mirror telescopes will use laser guide stars (LGS) for their adaptive optics (AO) systems. Two options to use as wavefront sensors (WFS) are the Shack-Hartmann wavefront sensor (SHWFS) and the pyramid wavefront sensor (PWFS). Aims. In this paper, we compare the noise performance of the PWFS and the SHWFS. We aim to find which of the two WFS is the best to use in a single or tomographic configuration. Methods. To compute the noise performance we extended a noise model developed for the PWFS to be used with the SHWFS. To do this, we expressed the centroiding algo","authors_text":"Benoit Neichel, Cedric-Taissir Heritier, Francisco Oyarzun, Paul Rouquette, Thierry Fusco, Vincent Chambouleyron","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2024-10-07T09:27:31Z","title":"Performance comparison of the Shack-Hartmann and pyramid wavefront sensors with a laser guide star for 40 m telescopes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2410.04863","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":"sha256:09bc29925b072db11bcd5b4f7b16fc16dbed1544ec049db5171226d8bca19385","target":"record","created_at":"2026-07-05T09:16:57Z","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":"f09eadef4ad54644af1d7774cf85623b7d120906ddc5e860df5b573ba7ced919","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2024-10-07T09:27:31Z","title_canon_sha256":"b8be1ab0cc75830f49cfe14c6706b60faf76a790ec32e0ef01f2e21d73a7ded9"},"schema_version":"1.0","source":{"id":"2410.04863","kind":"arxiv","version":1}},"canonical_sha256":"d32f5f7b0131785e3b772dccf7eec386180f6858707ff32a225db17cae09e858","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d32f5f7b0131785e3b772dccf7eec386180f6858707ff32a225db17cae09e858","first_computed_at":"2026-07-05T09:16:57.388557Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T09:16:57.388557Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Ob7wjN0LaHRmzIIWzbs9ZEYBGdtASTO7W+9DH00tUk1NnGIMma+Lxx1iJWZn9t5D/wJWA4UrMkK7tGPIrsAxBg==","signature_status":"signed_v1","signed_at":"2026-07-05T09:16:57.389029Z","signed_message":"canonical_sha256_bytes"},"source_id":"2410.04863","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:09bc29925b072db11bcd5b4f7b16fc16dbed1544ec049db5171226d8bca19385","sha256:9b5b3807115e24d1a111386102b3bad3907c7da7b44f455ebd4f87ff00dc60e4"],"state_sha256":"fc7260a73e1169573c0d828226bf04b9ec4f0cb53053bdeab758ee113b6e5854"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VsTpP3+TYYxsgcLRB3nRmslq/W2pr9UI+Z3kiCRPS4su6Oo9oMC9iLTKnj7+8vHXBlW5V0aI2bx81zZlmCSaAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T22:58:34.450223Z","bundle_sha256":"d71a0969b4a9d05916f2a85326d13ab9af891fd4fc7f946232ba6b06029ec917"}}