{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:IJOYZN6C4BDLWVESHEYX7W25ZX","short_pith_number":"pith:IJOYZN6C","canonical_record":{"source":{"id":"0807.0504","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-07-03T08:15:43Z","cross_cats_sorted":[],"title_canon_sha256":"909a0c3f6bdd6fa393b032a3ed1268382240040d40fb5f53daadd7ed43d4e3f6","abstract_canon_sha256":"5b7c4d0906119d7b89962735513d0cee81732a5d80f027132bb4e394c73f5a75"},"schema_version":"1.0"},"canonical_sha256":"425d8cb7c2e046bb549239317fdb5dcdf80ba8769e9732c9d2e81632a36dd808","source":{"kind":"arxiv","id":"0807.0504","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0807.0504","created_at":"2026-05-18T02:35:15Z"},{"alias_kind":"arxiv_version","alias_value":"0807.0504v1","created_at":"2026-05-18T02:35:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0807.0504","created_at":"2026-05-18T02:35:15Z"},{"alias_kind":"pith_short_12","alias_value":"IJOYZN6C4BDL","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_16","alias_value":"IJOYZN6C4BDLWVES","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_8","alias_value":"IJOYZN6C","created_at":"2026-05-18T12:25:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:IJOYZN6C4BDLWVESHEYX7W25ZX","target":"record","payload":{"canonical_record":{"source":{"id":"0807.0504","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-07-03T08:15:43Z","cross_cats_sorted":[],"title_canon_sha256":"909a0c3f6bdd6fa393b032a3ed1268382240040d40fb5f53daadd7ed43d4e3f6","abstract_canon_sha256":"5b7c4d0906119d7b89962735513d0cee81732a5d80f027132bb4e394c73f5a75"},"schema_version":"1.0"},"canonical_sha256":"425d8cb7c2e046bb549239317fdb5dcdf80ba8769e9732c9d2e81632a36dd808","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:35:15.647794Z","signature_b64":"xPsxZ8ymRlCiZJYwLKiV4p3DVxhRGKwBHFdcTT/9xZmMe7fv1eY5m1ZusfNAbZPI1CfXn64KLwDGnCyDzJxpDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"425d8cb7c2e046bb549239317fdb5dcdf80ba8769e9732c9d2e81632a36dd808","last_reissued_at":"2026-05-18T02:35:15.647396Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:35:15.647396Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0807.0504","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":"2026-05-18T02:35:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Nz9TtzspvfQM5f6oeZmOrbrBzVuS8PDKIv9kxexeNOZv0/sw/E5CYnsgPav1rt+mxpoFR11SQFhlnL6ijuIDAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T13:35:04.600335Z"},"content_sha256":"69e796655d34179ef843e8e04d8acee401c1bebcb6241df7bc98cea3860f6d3c","schema_version":"1.0","event_id":"sha256:69e796655d34179ef843e8e04d8acee401c1bebcb6241df7bc98cea3860f6d3c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:IJOYZN6C4BDLWVESHEYX7W25ZX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"AstraLux - the Calar Alto 2.2-m telescope Lucky Imaging camera","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Felix Hormuth, Stefan Hippler, Thomas Henning, Wolfgang Brandner","submitted_at":"2008-07-03T08:15:43Z","abstract_excerpt":"AstraLux is a Lucky Imaging camera for the Calar Alto 2.2-m telescope, based on an electron-multiplying high speed CCD. By selecting only the best 1-10% of several thousand short exposure frames, AstraLux provides nearly diffraction limited imaging capabilities in the SDSS i' and z' filters over a field of view of 24x24 arcseconds. By choosing commercially available components wherever possible, the instrument could be built in short time and at comparably low cost. We briefly present the instrument design, the data reduction pipeline, and summarise the performance and characteristics"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0807.0504","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":""},"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":"2026-05-18T02:35:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sR4y5CPtPTsWWDYx+QHIlnmctY+F9xpOSF1Up+CG/mYSNJWdAqbu1EXF3Zo6+2znlSC5qwA581OWJ2+7UN6XAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T13:35:04.601062Z"},"content_sha256":"d6a340cb749a0d90650a239a2450fbe7ff14bab8e08b4d9ef95cb014b6a2fcec","schema_version":"1.0","event_id":"sha256:d6a340cb749a0d90650a239a2450fbe7ff14bab8e08b4d9ef95cb014b6a2fcec"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IJOYZN6C4BDLWVESHEYX7W25ZX/bundle.json","state_url":"https://pith.science/pith/IJOYZN6C4BDLWVESHEYX7W25ZX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IJOYZN6C4BDLWVESHEYX7W25ZX/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":"2026-05-23T13:35:04Z","links":{"resolver":"https://pith.science/pith/IJOYZN6C4BDLWVESHEYX7W25ZX","bundle":"https://pith.science/pith/IJOYZN6C4BDLWVESHEYX7W25ZX/bundle.json","state":"https://pith.science/pith/IJOYZN6C4BDLWVESHEYX7W25ZX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IJOYZN6C4BDLWVESHEYX7W25ZX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:IJOYZN6C4BDLWVESHEYX7W25ZX","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":"5b7c4d0906119d7b89962735513d0cee81732a5d80f027132bb4e394c73f5a75","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-07-03T08:15:43Z","title_canon_sha256":"909a0c3f6bdd6fa393b032a3ed1268382240040d40fb5f53daadd7ed43d4e3f6"},"schema_version":"1.0","source":{"id":"0807.0504","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0807.0504","created_at":"2026-05-18T02:35:15Z"},{"alias_kind":"arxiv_version","alias_value":"0807.0504v1","created_at":"2026-05-18T02:35:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0807.0504","created_at":"2026-05-18T02:35:15Z"},{"alias_kind":"pith_short_12","alias_value":"IJOYZN6C4BDL","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_16","alias_value":"IJOYZN6C4BDLWVES","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_8","alias_value":"IJOYZN6C","created_at":"2026-05-18T12:25:57Z"}],"graph_snapshots":[{"event_id":"sha256:d6a340cb749a0d90650a239a2450fbe7ff14bab8e08b4d9ef95cb014b6a2fcec","target":"graph","created_at":"2026-05-18T02:35:15Z","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"},"paper":{"abstract_excerpt":"AstraLux is a Lucky Imaging camera for the Calar Alto 2.2-m telescope, based on an electron-multiplying high speed CCD. By selecting only the best 1-10% of several thousand short exposure frames, AstraLux provides nearly diffraction limited imaging capabilities in the SDSS i' and z' filters over a field of view of 24x24 arcseconds. By choosing commercially available components wherever possible, the instrument could be built in short time and at comparably low cost. We briefly present the instrument design, the data reduction pipeline, and summarise the performance and characteristics","authors_text":"Felix Hormuth, Stefan Hippler, Thomas Henning, Wolfgang Brandner","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-07-03T08:15:43Z","title":"AstraLux - the Calar Alto 2.2-m telescope Lucky Imaging camera"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0807.0504","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":"sha256:69e796655d34179ef843e8e04d8acee401c1bebcb6241df7bc98cea3860f6d3c","target":"record","created_at":"2026-05-18T02:35:15Z","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":"5b7c4d0906119d7b89962735513d0cee81732a5d80f027132bb4e394c73f5a75","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-07-03T08:15:43Z","title_canon_sha256":"909a0c3f6bdd6fa393b032a3ed1268382240040d40fb5f53daadd7ed43d4e3f6"},"schema_version":"1.0","source":{"id":"0807.0504","kind":"arxiv","version":1}},"canonical_sha256":"425d8cb7c2e046bb549239317fdb5dcdf80ba8769e9732c9d2e81632a36dd808","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"425d8cb7c2e046bb549239317fdb5dcdf80ba8769e9732c9d2e81632a36dd808","first_computed_at":"2026-05-18T02:35:15.647396Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:35:15.647396Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xPsxZ8ymRlCiZJYwLKiV4p3DVxhRGKwBHFdcTT/9xZmMe7fv1eY5m1ZusfNAbZPI1CfXn64KLwDGnCyDzJxpDg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:35:15.647794Z","signed_message":"canonical_sha256_bytes"},"source_id":"0807.0504","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:69e796655d34179ef843e8e04d8acee401c1bebcb6241df7bc98cea3860f6d3c","sha256:d6a340cb749a0d90650a239a2450fbe7ff14bab8e08b4d9ef95cb014b6a2fcec"],"state_sha256":"2a443df5dd41e7007ff8f1713ba5512b50ee14c0a7849388f9a2388670c5f1ae"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"N4rWMs6sMaF9a3ho9YBoIITtqaLiGwNR5k+Fq1mbwy88PG9PIf4x1Y2blsJ6kDWsL9qFTdDqaYAqkXaThbIJAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-23T13:35:04.604749Z","bundle_sha256":"a7c8db2c4454eead2d1d7622706e7667c35932498880958ac973c5273203f0db"}}