{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:75O7U6FCR6CJLDOQOR2EYZDT55","short_pith_number":"pith:75O7U6FC","canonical_record":{"source":{"id":"2012.07560","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2020-12-14T14:23:31Z","cross_cats_sorted":[],"title_canon_sha256":"fa17f85a89b73718cf20d836b9876a0555f0716b914321cb220217fffec4a9be","abstract_canon_sha256":"8ded48d4b61c02f4face34b97b40c8817144865f1533c2af8686f6dc68ecc10b"},"schema_version":"1.0"},"canonical_sha256":"ff5dfa78a28f84958dd074744c6473ef66cc21b6292239ec895008908601717c","source":{"kind":"arxiv","id":"2012.07560","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2012.07560","created_at":"2026-07-05T01:59:21Z"},{"alias_kind":"arxiv_version","alias_value":"2012.07560v1","created_at":"2026-07-05T01:59:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2012.07560","created_at":"2026-07-05T01:59:21Z"},{"alias_kind":"pith_short_12","alias_value":"75O7U6FCR6CJ","created_at":"2026-07-05T01:59:21Z"},{"alias_kind":"pith_short_16","alias_value":"75O7U6FCR6CJLDOQ","created_at":"2026-07-05T01:59:21Z"},{"alias_kind":"pith_short_8","alias_value":"75O7U6FC","created_at":"2026-07-05T01:59:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:75O7U6FCR6CJLDOQOR2EYZDT55","target":"record","payload":{"canonical_record":{"source":{"id":"2012.07560","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2020-12-14T14:23:31Z","cross_cats_sorted":[],"title_canon_sha256":"fa17f85a89b73718cf20d836b9876a0555f0716b914321cb220217fffec4a9be","abstract_canon_sha256":"8ded48d4b61c02f4face34b97b40c8817144865f1533c2af8686f6dc68ecc10b"},"schema_version":"1.0"},"canonical_sha256":"ff5dfa78a28f84958dd074744c6473ef66cc21b6292239ec895008908601717c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:59:21.958220Z","signature_b64":"c9ZJY/PkY3gLdtBsDnBXvEvVIIfqgI2sHVAX2xGkoKfeclhTLTy2QMdqn2/w++t2Fu6TxJr8albK77Vne+yRDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ff5dfa78a28f84958dd074744c6473ef66cc21b6292239ec895008908601717c","last_reissued_at":"2026-07-05T01:59:21.957791Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:59:21.957791Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2012.07560","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":"2026-07-05T01:59:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"37NchmnVrVDFWiHWsqFrAY/SC+EgnuNPKIMoYOZ9ShOwe+8Mi9tF+vTxahSeLxGIIt5T9tLDrYzxYS9RUbBnCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T01:05:13.874859Z"},"content_sha256":"49af2805e10020aaaf3d9182006fe654c326df138f5cb7a94f54a3319e3a58bf","schema_version":"1.0","event_id":"sha256:49af2805e10020aaaf3d9182006fe654c326df138f5cb7a94f54a3319e3a58bf"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:75O7U6FCR6CJLDOQOR2EYZDT55","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Pupil plane wavefront sensing for extended and 3D sources","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Carmelo Arcidiacono, Davide Greggio, Demetrio Magrin, Elisa Portaluri, Federico Biondi, Gabriele Umbriaco, Jacopo Farinato, Kalyan Radhakrishnan, Luca Marafatto, Marco Dima, Maria Bergomi, Roberto Ragazzoni, Simone Di Filippo, Valentina Viotto","submitted_at":"2020-12-14T14:23:31Z","abstract_excerpt":"The basic outline of a pupil plane WaveFront Sensor is reviewed taking into account that the source to be sensed could be different from an unresolved source, i.e. it is extended, and that it could deploy also in a 3D fashion, enough to exceed the field's depth of the observing telescope. Under these conditions it is pointed out that the features of the reference are not invariant for different position on the pupil and it is shown that the INGOT WFS is the equivalent of the Pyramid for a Laser Guide Star. Under these conditions one can imagine to use a Dark WFS approach to improve the SNR of "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2012.07560","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/2012.07560/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":"2026-07-05T01:59:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nejDWa3LS5b29U7sFh/NGZ3hb9b7BpZNO4b4UxegA9xLeGMtvYExl+vA8aGKHyzRmkFSXLmJmqJBc4L/tM30CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T01:05:13.875725Z"},"content_sha256":"f080ef8e980a5de1f3d3191586606f090772464f786b637bed8f40a24a638a07","schema_version":"1.0","event_id":"sha256:f080ef8e980a5de1f3d3191586606f090772464f786b637bed8f40a24a638a07"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/75O7U6FCR6CJLDOQOR2EYZDT55/bundle.json","state_url":"https://pith.science/pith/75O7U6FCR6CJLDOQOR2EYZDT55/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/75O7U6FCR6CJLDOQOR2EYZDT55/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":"2026-08-11T01:05:13Z","links":{"resolver":"https://pith.science/pith/75O7U6FCR6CJLDOQOR2EYZDT55","bundle":"https://pith.science/pith/75O7U6FCR6CJLDOQOR2EYZDT55/bundle.json","state":"https://pith.science/pith/75O7U6FCR6CJLDOQOR2EYZDT55/state.json","well_known_bundle":"https://pith.science/.well-known/pith/75O7U6FCR6CJLDOQOR2EYZDT55/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:75O7U6FCR6CJLDOQOR2EYZDT55","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":"8ded48d4b61c02f4face34b97b40c8817144865f1533c2af8686f6dc68ecc10b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2020-12-14T14:23:31Z","title_canon_sha256":"fa17f85a89b73718cf20d836b9876a0555f0716b914321cb220217fffec4a9be"},"schema_version":"1.0","source":{"id":"2012.07560","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2012.07560","created_at":"2026-07-05T01:59:21Z"},{"alias_kind":"arxiv_version","alias_value":"2012.07560v1","created_at":"2026-07-05T01:59:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2012.07560","created_at":"2026-07-05T01:59:21Z"},{"alias_kind":"pith_short_12","alias_value":"75O7U6FCR6CJ","created_at":"2026-07-05T01:59:21Z"},{"alias_kind":"pith_short_16","alias_value":"75O7U6FCR6CJLDOQ","created_at":"2026-07-05T01:59:21Z"},{"alias_kind":"pith_short_8","alias_value":"75O7U6FC","created_at":"2026-07-05T01:59:21Z"}],"graph_snapshots":[{"event_id":"sha256:f080ef8e980a5de1f3d3191586606f090772464f786b637bed8f40a24a638a07","target":"graph","created_at":"2026-07-05T01:59:21Z","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/2012.07560/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The basic outline of a pupil plane WaveFront Sensor is reviewed taking into account that the source to be sensed could be different from an unresolved source, i.e. it is extended, and that it could deploy also in a 3D fashion, enough to exceed the field's depth of the observing telescope. Under these conditions it is pointed out that the features of the reference are not invariant for different position on the pupil and it is shown that the INGOT WFS is the equivalent of the Pyramid for a Laser Guide Star. Under these conditions one can imagine to use a Dark WFS approach to improve the SNR of ","authors_text":"Carmelo Arcidiacono, Davide Greggio, Demetrio Magrin, Elisa Portaluri, Federico Biondi, Gabriele Umbriaco, Jacopo Farinato, Kalyan Radhakrishnan, Luca Marafatto, Marco Dima, Maria Bergomi, Roberto Ragazzoni, Simone Di Filippo, Valentina Viotto","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2020-12-14T14:23:31Z","title":"Pupil plane wavefront sensing for extended and 3D sources"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2012.07560","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":"sha256:49af2805e10020aaaf3d9182006fe654c326df138f5cb7a94f54a3319e3a58bf","target":"record","created_at":"2026-07-05T01:59:21Z","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":"8ded48d4b61c02f4face34b97b40c8817144865f1533c2af8686f6dc68ecc10b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2020-12-14T14:23:31Z","title_canon_sha256":"fa17f85a89b73718cf20d836b9876a0555f0716b914321cb220217fffec4a9be"},"schema_version":"1.0","source":{"id":"2012.07560","kind":"arxiv","version":1}},"canonical_sha256":"ff5dfa78a28f84958dd074744c6473ef66cc21b6292239ec895008908601717c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ff5dfa78a28f84958dd074744c6473ef66cc21b6292239ec895008908601717c","first_computed_at":"2026-07-05T01:59:21.957791Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:59:21.957791Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"c9ZJY/PkY3gLdtBsDnBXvEvVIIfqgI2sHVAX2xGkoKfeclhTLTy2QMdqn2/w++t2Fu6TxJr8albK77Vne+yRDw==","signature_status":"signed_v1","signed_at":"2026-07-05T01:59:21.958220Z","signed_message":"canonical_sha256_bytes"},"source_id":"2012.07560","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:49af2805e10020aaaf3d9182006fe654c326df138f5cb7a94f54a3319e3a58bf","sha256:f080ef8e980a5de1f3d3191586606f090772464f786b637bed8f40a24a638a07"],"state_sha256":"f3b6aef9dbff15f3c9350cb2e6a1321d59519f9ba28170c7aee4917e89b281f5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xCJ0PkeQ5nri+HnAHBQ7FRizPW/I0MA0xn46vQ3ROVld1iL0GHLgc+koIwU6zGBokusuVYcTPk8R0dYlsP08AA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-11T01:05:13.884170Z","bundle_sha256":"4e809b8e78c8faa5199043001516d23f912fdd58209f8b1f27d550023ec7fd9e"}}