{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2005:NXQT6ICOI6WBGYQNY6RZFDQECM","short_pith_number":"pith:NXQT6ICO","canonical_record":{"source":{"id":"astro-ph/0508402","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2005-08-19T18:59:38Z","cross_cats_sorted":[],"title_canon_sha256":"ddcbfeb0a7ee66ad3496d76e8d420eba8fb4d4b8eda73b552ffd87d061f2c771","abstract_canon_sha256":"5c7de00cb4ea282f46acb41c6c8e8646b534137df790c57cc24327fb59c5078d"},"schema_version":"1.0"},"canonical_sha256":"6de13f204e47ac13620dc7a3928e0413275220234c56bc84b60eaba1763f5d8e","source":{"kind":"arxiv","id":"astro-ph/0508402","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0508402","created_at":"2026-07-04T17:15:01Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0508402v2","created_at":"2026-07-04T17:15:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0508402","created_at":"2026-07-04T17:15:01Z"},{"alias_kind":"pith_short_12","alias_value":"NXQT6ICOI6WB","created_at":"2026-07-04T17:15:01Z"},{"alias_kind":"pith_short_16","alias_value":"NXQT6ICOI6WBGYQN","created_at":"2026-07-04T17:15:01Z"},{"alias_kind":"pith_short_8","alias_value":"NXQT6ICO","created_at":"2026-07-04T17:15:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2005:NXQT6ICOI6WBGYQNY6RZFDQECM","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0508402","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2005-08-19T18:59:38Z","cross_cats_sorted":[],"title_canon_sha256":"ddcbfeb0a7ee66ad3496d76e8d420eba8fb4d4b8eda73b552ffd87d061f2c771","abstract_canon_sha256":"5c7de00cb4ea282f46acb41c6c8e8646b534137df790c57cc24327fb59c5078d"},"schema_version":"1.0"},"canonical_sha256":"6de13f204e47ac13620dc7a3928e0413275220234c56bc84b60eaba1763f5d8e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:15:01.915248Z","signature_b64":"jteV2PRlVjUMJv0to/YqYos3gDtofaj5//LS1Ju98jcRpm9rlC86oZ6Hw7v5K/K/uVwrj/fNfRobESJU+/N7DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6de13f204e47ac13620dc7a3928e0413275220234c56bc84b60eaba1763f5d8e","last_reissued_at":"2026-07-04T17:15:01.914840Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:15:01.914840Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0508402","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":"2026-07-04T17:15:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"REhm9n6Ak80C5SbulQILexbfl/XlwW3B4mkpAu143YqSQ2nBMiqW6iZZP6wHWWS73kZeunpGhyxyKzMlh6sBBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T00:14:18.337579Z"},"content_sha256":"93b3637231c944818ecbf5fe55d4d138ebc21f74ef7089675865b2ff466c4b18","schema_version":"1.0","event_id":"sha256:93b3637231c944818ecbf5fe55d4d138ebc21f74ef7089675865b2ff466c4b18"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2005:NXQT6ICOI6WBGYQNY6RZFDQECM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"First tests of wavefront sensing with a constellation of laser guide beacons","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"C. Baranec, J. R. P. Angel, M. Lloyd-Hart, M. Snyder, N. M. Milton, N. Putnam, T. Stalcup","submitted_at":"2005-08-19T18:59:38Z","abstract_excerpt":"Adaptive optics to correct current telescopes over wide fields, or future very large telescopes over even narrow fields, will require real-time wavefront measurements made with a constellation of laser beacons. Here we report the first such measurements, made at the 6.5 m MMT with five Rayleigh beacons in a 2 arcmin pentagon. Each beacon is made with a pulsed beam at 532 nm, of 4 W at the exit pupil of the projector. The return is range-gated from 20-29 km and recorded at 53 Hz by a 36-element Shack-Hartmann sensor. Wavefronts derived from the beacons are compared with simultaneous wavefronts "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0508402","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/astro-ph/0508402/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":"2026-07-04T17:15:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RNGishdoTbQgRx3tXqsAbmJvd5Nv8u12nYEsr07MHcPSH8/BOB3KWtVVxVwc6mE8Lmb/F36//Hpj7TcS/582AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T00:14:18.339234Z"},"content_sha256":"07c3b75840e0ba8cdbacd9d6e0c2bfcec138b05ed89060d4cc99063844bc9db4","schema_version":"1.0","event_id":"sha256:07c3b75840e0ba8cdbacd9d6e0c2bfcec138b05ed89060d4cc99063844bc9db4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NXQT6ICOI6WBGYQNY6RZFDQECM/bundle.json","state_url":"https://pith.science/pith/NXQT6ICOI6WBGYQNY6RZFDQECM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NXQT6ICOI6WBGYQNY6RZFDQECM/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":"2026-08-07T00:14:18Z","links":{"resolver":"https://pith.science/pith/NXQT6ICOI6WBGYQNY6RZFDQECM","bundle":"https://pith.science/pith/NXQT6ICOI6WBGYQNY6RZFDQECM/bundle.json","state":"https://pith.science/pith/NXQT6ICOI6WBGYQNY6RZFDQECM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NXQT6ICOI6WBGYQNY6RZFDQECM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2005:NXQT6ICOI6WBGYQNY6RZFDQECM","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":"5c7de00cb4ea282f46acb41c6c8e8646b534137df790c57cc24327fb59c5078d","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2005-08-19T18:59:38Z","title_canon_sha256":"ddcbfeb0a7ee66ad3496d76e8d420eba8fb4d4b8eda73b552ffd87d061f2c771"},"schema_version":"1.0","source":{"id":"astro-ph/0508402","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0508402","created_at":"2026-07-04T17:15:01Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0508402v2","created_at":"2026-07-04T17:15:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0508402","created_at":"2026-07-04T17:15:01Z"},{"alias_kind":"pith_short_12","alias_value":"NXQT6ICOI6WB","created_at":"2026-07-04T17:15:01Z"},{"alias_kind":"pith_short_16","alias_value":"NXQT6ICOI6WBGYQN","created_at":"2026-07-04T17:15:01Z"},{"alias_kind":"pith_short_8","alias_value":"NXQT6ICO","created_at":"2026-07-04T17:15:01Z"}],"graph_snapshots":[{"event_id":"sha256:07c3b75840e0ba8cdbacd9d6e0c2bfcec138b05ed89060d4cc99063844bc9db4","target":"graph","created_at":"2026-07-04T17:15:01Z","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/astro-ph/0508402/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Adaptive optics to correct current telescopes over wide fields, or future very large telescopes over even narrow fields, will require real-time wavefront measurements made with a constellation of laser beacons. Here we report the first such measurements, made at the 6.5 m MMT with five Rayleigh beacons in a 2 arcmin pentagon. Each beacon is made with a pulsed beam at 532 nm, of 4 W at the exit pupil of the projector. The return is range-gated from 20-29 km and recorded at 53 Hz by a 36-element Shack-Hartmann sensor. Wavefronts derived from the beacons are compared with simultaneous wavefronts ","authors_text":"C. Baranec, J. R. P. Angel, M. Lloyd-Hart, M. Snyder, N. M. Milton, N. Putnam, T. Stalcup","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2005-08-19T18:59:38Z","title":"First tests of wavefront sensing with a constellation of laser guide beacons"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0508402","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":"sha256:93b3637231c944818ecbf5fe55d4d138ebc21f74ef7089675865b2ff466c4b18","target":"record","created_at":"2026-07-04T17:15:01Z","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":"5c7de00cb4ea282f46acb41c6c8e8646b534137df790c57cc24327fb59c5078d","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2005-08-19T18:59:38Z","title_canon_sha256":"ddcbfeb0a7ee66ad3496d76e8d420eba8fb4d4b8eda73b552ffd87d061f2c771"},"schema_version":"1.0","source":{"id":"astro-ph/0508402","kind":"arxiv","version":2}},"canonical_sha256":"6de13f204e47ac13620dc7a3928e0413275220234c56bc84b60eaba1763f5d8e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6de13f204e47ac13620dc7a3928e0413275220234c56bc84b60eaba1763f5d8e","first_computed_at":"2026-07-04T17:15:01.914840Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:15:01.914840Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jteV2PRlVjUMJv0to/YqYos3gDtofaj5//LS1Ju98jcRpm9rlC86oZ6Hw7v5K/K/uVwrj/fNfRobESJU+/N7DQ==","signature_status":"signed_v1","signed_at":"2026-07-04T17:15:01.915248Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0508402","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:93b3637231c944818ecbf5fe55d4d138ebc21f74ef7089675865b2ff466c4b18","sha256:07c3b75840e0ba8cdbacd9d6e0c2bfcec138b05ed89060d4cc99063844bc9db4"],"state_sha256":"f77a3afc38d85cb888ef0ead136a6cd6874d499cc8741982abf4db790078d60a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TbqsRH1I43ngxzzrjl+LcDw9zP5/cyDY58ComzZaTgvOdnavn4cjYKp56CjbaLzssLALcLn1ZE6tpxBrFUyYDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T00:14:18.346407Z","bundle_sha256":"9c9140d89cfdc2ab829c1f55ae399de5f30f69dfed8d34593a3c30f50229e3c1"}}