{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:QEO5GEBOASU2CO7BAAKO7Y2X53","short_pith_number":"pith:QEO5GEBO","canonical_record":{"source":{"id":"0801.3738","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2008-01-24T11:33:48Z","cross_cats_sorted":[],"title_canon_sha256":"9d31e420eca874c9da2b81c637f8f04d31fcabed3f61c0b2fa283b199ed3dc2f","abstract_canon_sha256":"11125ca1c1a61d66990932c3945b2893bfa84d4150db4e00af5c5b0363cda549"},"schema_version":"1.0"},"canonical_sha256":"811dd3102e04a9a13be10014efe357eeef1fbdd5fb62d1efb9cdef0644b9ed51","source":{"kind":"arxiv","id":"0801.3738","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0801.3738","created_at":"2026-07-04T15:07:01Z"},{"alias_kind":"arxiv_version","alias_value":"0801.3738v1","created_at":"2026-07-04T15:07:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0801.3738","created_at":"2026-07-04T15:07:01Z"},{"alias_kind":"pith_short_12","alias_value":"QEO5GEBOASU2","created_at":"2026-07-04T15:07:01Z"},{"alias_kind":"pith_short_16","alias_value":"QEO5GEBOASU2CO7B","created_at":"2026-07-04T15:07:01Z"},{"alias_kind":"pith_short_8","alias_value":"QEO5GEBO","created_at":"2026-07-04T15:07:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:QEO5GEBOASU2CO7BAAKO7Y2X53","target":"record","payload":{"canonical_record":{"source":{"id":"0801.3738","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2008-01-24T11:33:48Z","cross_cats_sorted":[],"title_canon_sha256":"9d31e420eca874c9da2b81c637f8f04d31fcabed3f61c0b2fa283b199ed3dc2f","abstract_canon_sha256":"11125ca1c1a61d66990932c3945b2893bfa84d4150db4e00af5c5b0363cda549"},"schema_version":"1.0"},"canonical_sha256":"811dd3102e04a9a13be10014efe357eeef1fbdd5fb62d1efb9cdef0644b9ed51","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:07:01.997507Z","signature_b64":"NcaE/GV1gY6S6YM8NKN38FDEIF9Jc1Vy4X1Ia34SFXmIsz5Ox58MEmqt25g27flOWxBj3bRTTCPlDJJfZ/2nCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"811dd3102e04a9a13be10014efe357eeef1fbdd5fb62d1efb9cdef0644b9ed51","last_reissued_at":"2026-07-04T15:07:01.997131Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:07:01.997131Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0801.3738","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":"2026-07-04T15:07:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6rzfM6yKf51Yf2Ur4XVLhPfoQfAXHOLe+oQCeJyl0t5O2Kxza84i/EuDjTc2nc5M/pYjix8HtkuMSqyK7aRYAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T22:37:33.799145Z"},"content_sha256":"3d62b5b7f68457d6d268e012d039fb93f7c16fd4316f15b1f2387be94af6c7ee","schema_version":"1.0","event_id":"sha256:3d62b5b7f68457d6d268e012d039fb93f7c16fd4316f15b1f2387be94af6c7ee"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:QEO5GEBOASU2CO7BAAKO7Y2X53","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Laser Guide Star Adaptive Optics without Tip-tilt","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"C. Dumas, C. Lidman, F. Mannucci, M. Kasper, M. Le Louarn, N. Ageorges, N. M. Forster Schreiber, P. Amico, R. Davies, S. Rabien, V. Roccatagliata","submitted_at":"2008-01-24T11:33:48Z","abstract_excerpt":"Adaptive optics (AO) systems allow a telescope to reach its diffraction limit at near infrared wavelengths. But to achieve this, a bright natural guide star (NGS) is needed for the wavefront sensing, severely limiting the fraction of the sky over which AO can be used. To some extent this can be overcome with a laser guide star (LGS). While the laser can be pointed anywhere in the sky, one still needs to have a natural star, albeit fainter, reasonably close to correct the image motion (tip-tilt) to which laser guide stars are insensitive. There are in fact many astronomical targets without suit"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0801.3738","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/0801.3738/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":"2026-07-04T15:07:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nID1NkegOqDfLhGs2y0SSULEeN6+L7bgz7lXH3R2GSKNRP+XkTedRIEOJATx/ZWzwdPD583GtGL4rbm401ByDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T22:37:33.799540Z"},"content_sha256":"9531119aa1f8595f4f8fac8c4c7cd80ce53a517f34945d09a4861b8e12009ef3","schema_version":"1.0","event_id":"sha256:9531119aa1f8595f4f8fac8c4c7cd80ce53a517f34945d09a4861b8e12009ef3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QEO5GEBOASU2CO7BAAKO7Y2X53/bundle.json","state_url":"https://pith.science/pith/QEO5GEBOASU2CO7BAAKO7Y2X53/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QEO5GEBOASU2CO7BAAKO7Y2X53/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":"2026-08-05T22:37:33Z","links":{"resolver":"https://pith.science/pith/QEO5GEBOASU2CO7BAAKO7Y2X53","bundle":"https://pith.science/pith/QEO5GEBOASU2CO7BAAKO7Y2X53/bundle.json","state":"https://pith.science/pith/QEO5GEBOASU2CO7BAAKO7Y2X53/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QEO5GEBOASU2CO7BAAKO7Y2X53/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:QEO5GEBOASU2CO7BAAKO7Y2X53","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":"11125ca1c1a61d66990932c3945b2893bfa84d4150db4e00af5c5b0363cda549","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2008-01-24T11:33:48Z","title_canon_sha256":"9d31e420eca874c9da2b81c637f8f04d31fcabed3f61c0b2fa283b199ed3dc2f"},"schema_version":"1.0","source":{"id":"0801.3738","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0801.3738","created_at":"2026-07-04T15:07:01Z"},{"alias_kind":"arxiv_version","alias_value":"0801.3738v1","created_at":"2026-07-04T15:07:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0801.3738","created_at":"2026-07-04T15:07:01Z"},{"alias_kind":"pith_short_12","alias_value":"QEO5GEBOASU2","created_at":"2026-07-04T15:07:01Z"},{"alias_kind":"pith_short_16","alias_value":"QEO5GEBOASU2CO7B","created_at":"2026-07-04T15:07:01Z"},{"alias_kind":"pith_short_8","alias_value":"QEO5GEBO","created_at":"2026-07-04T15:07:01Z"}],"graph_snapshots":[{"event_id":"sha256:9531119aa1f8595f4f8fac8c4c7cd80ce53a517f34945d09a4861b8e12009ef3","target":"graph","created_at":"2026-07-04T15:07:01Z","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/0801.3738/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Adaptive optics (AO) systems allow a telescope to reach its diffraction limit at near infrared wavelengths. But to achieve this, a bright natural guide star (NGS) is needed for the wavefront sensing, severely limiting the fraction of the sky over which AO can be used. To some extent this can be overcome with a laser guide star (LGS). While the laser can be pointed anywhere in the sky, one still needs to have a natural star, albeit fainter, reasonably close to correct the image motion (tip-tilt) to which laser guide stars are insensitive. There are in fact many astronomical targets without suit","authors_text":"C. Dumas, C. Lidman, F. Mannucci, M. Kasper, M. Le Louarn, N. Ageorges, N. M. Forster Schreiber, P. Amico, R. Davies, S. Rabien, V. Roccatagliata","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2008-01-24T11:33:48Z","title":"Laser Guide Star Adaptive Optics without Tip-tilt"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0801.3738","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":"sha256:3d62b5b7f68457d6d268e012d039fb93f7c16fd4316f15b1f2387be94af6c7ee","target":"record","created_at":"2026-07-04T15:07:01Z","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":"11125ca1c1a61d66990932c3945b2893bfa84d4150db4e00af5c5b0363cda549","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2008-01-24T11:33:48Z","title_canon_sha256":"9d31e420eca874c9da2b81c637f8f04d31fcabed3f61c0b2fa283b199ed3dc2f"},"schema_version":"1.0","source":{"id":"0801.3738","kind":"arxiv","version":1}},"canonical_sha256":"811dd3102e04a9a13be10014efe357eeef1fbdd5fb62d1efb9cdef0644b9ed51","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"811dd3102e04a9a13be10014efe357eeef1fbdd5fb62d1efb9cdef0644b9ed51","first_computed_at":"2026-07-04T15:07:01.997131Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:07:01.997131Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NcaE/GV1gY6S6YM8NKN38FDEIF9Jc1Vy4X1Ia34SFXmIsz5Ox58MEmqt25g27flOWxBj3bRTTCPlDJJfZ/2nCw==","signature_status":"signed_v1","signed_at":"2026-07-04T15:07:01.997507Z","signed_message":"canonical_sha256_bytes"},"source_id":"0801.3738","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3d62b5b7f68457d6d268e012d039fb93f7c16fd4316f15b1f2387be94af6c7ee","sha256:9531119aa1f8595f4f8fac8c4c7cd80ce53a517f34945d09a4861b8e12009ef3"],"state_sha256":"1e48f02cff4bea9185ef188dc06c09c0e8f699f22a7b48872251d6e564bd9f90"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7unBbi6V3goUPYeaOJJ719wtKzuPSRsfBPSdYtVc6tdiqp9EJEo9VJRqZ1VdjBwzc2LIM64nh1JhZC8rWx8yBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T22:37:33.802125Z","bundle_sha256":"be834cdfec4f10c76df77fbe07583e455c6b14957504e1f1d2501e7a0159fd31"}}