{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:M7PV2GX7IA5H5U7YEJTRQAFMWJ","short_pith_number":"pith:M7PV2GX7","canonical_record":{"source":{"id":"1806.06158","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-06-16T00:35:42Z","cross_cats_sorted":[],"title_canon_sha256":"c044f1ccd666208e84a6ac5ace7be13d16e7f375db8b308c16adc337047fddcf","abstract_canon_sha256":"705266f70b04d7abef1f1f16b04d15efc98483425f6341a36f4b53fafe5f78fb"},"schema_version":"1.0"},"canonical_sha256":"67df5d1aff403a7ed3f822671800acb27fa3dfcf51cff2589f9a8a977f20026d","source":{"kind":"arxiv","id":"1806.06158","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1806.06158","created_at":"2026-05-18T00:12:13Z"},{"alias_kind":"arxiv_version","alias_value":"1806.06158v2","created_at":"2026-05-18T00:12:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.06158","created_at":"2026-05-18T00:12:13Z"},{"alias_kind":"pith_short_12","alias_value":"M7PV2GX7IA5H","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_16","alias_value":"M7PV2GX7IA5H5U7Y","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_8","alias_value":"M7PV2GX7","created_at":"2026-05-18T12:32:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:M7PV2GX7IA5H5U7YEJTRQAFMWJ","target":"record","payload":{"canonical_record":{"source":{"id":"1806.06158","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-06-16T00:35:42Z","cross_cats_sorted":[],"title_canon_sha256":"c044f1ccd666208e84a6ac5ace7be13d16e7f375db8b308c16adc337047fddcf","abstract_canon_sha256":"705266f70b04d7abef1f1f16b04d15efc98483425f6341a36f4b53fafe5f78fb"},"schema_version":"1.0"},"canonical_sha256":"67df5d1aff403a7ed3f822671800acb27fa3dfcf51cff2589f9a8a977f20026d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:12:13.426457Z","signature_b64":"AjZNfLZFUAgEOFXBZxu6I3Ks1f85cKk5eNifCUXsLKC5YkpBJ1ak5pQnMf4rMf8u2JdUEX324wYiddpIBxV/DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"67df5d1aff403a7ed3f822671800acb27fa3dfcf51cff2589f9a8a977f20026d","last_reissued_at":"2026-05-18T00:12:13.425735Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:12:13.425735Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1806.06158","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":"2026-05-18T00:12:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"C+Au2CRMifYBZ53gTUadtfs+y7U+crIt1gWCIrticAH0Wnk6Uk83OH8hPxN3kPiO159EUoWamTFFIsinuiuwAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T05:21:11.010365Z"},"content_sha256":"8876dc932a565eeb10a8291aa41c10a4595a29676ad67b04c0b511e27e0b931e","schema_version":"1.0","event_id":"sha256:8876dc932a565eeb10a8291aa41c10a4595a29676ad67b04c0b511e27e0b931e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:M7PV2GX7IA5H5U7YEJTRQAFMWJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On-sky compensation of non-common path aberrations with the ZELDA wavefront sensor in VLT/SPHERE","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"A. Vigan, D. Mouillet, G. Zins, J.-F. Sauvage, J.-L. Beuzit, J. Milli, K. Dohlen, M. N'Diaye, R. Pourcelot, Z. Wahhaj","submitted_at":"2018-06-16T00:35:42Z","abstract_excerpt":"Circumstellar environments are now routinely observed by dedicated high-contrast imagers on large, ground-based observatories. These facilities combine extreme adaptive optics and coronagraphy to achieve unprecedented sensitivities for exoplanet detection and spectral characterization. However, non-common path aberrations (NCPA) in these coronagraphic systems represent a critical limitation for the detection of giant planets with a contrast lower than a few $10^{-6}$ at very small separations ($<$0.3$^{\\prime\\prime}$) from their host star. In 2013 we proposed ZELDA, a Zernike wavefront sensor "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.06158","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":""},"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":"2026-05-18T00:12:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QIw9CFHgcEQ8RqVJPR+Ow2QwvONKEZJBAiovAIS8JyBp3X2ZSuD0LyQnFy9G8fMH/kmIhTGLyLjgyRdaFtcHCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T05:21:11.011084Z"},"content_sha256":"f23edbb014137895ac5d19aa1a36e83c0106a4feb0d195ab0ad6a9c54dd5b79d","schema_version":"1.0","event_id":"sha256:f23edbb014137895ac5d19aa1a36e83c0106a4feb0d195ab0ad6a9c54dd5b79d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/M7PV2GX7IA5H5U7YEJTRQAFMWJ/bundle.json","state_url":"https://pith.science/pith/M7PV2GX7IA5H5U7YEJTRQAFMWJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/M7PV2GX7IA5H5U7YEJTRQAFMWJ/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":"2026-05-27T05:21:11Z","links":{"resolver":"https://pith.science/pith/M7PV2GX7IA5H5U7YEJTRQAFMWJ","bundle":"https://pith.science/pith/M7PV2GX7IA5H5U7YEJTRQAFMWJ/bundle.json","state":"https://pith.science/pith/M7PV2GX7IA5H5U7YEJTRQAFMWJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/M7PV2GX7IA5H5U7YEJTRQAFMWJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:M7PV2GX7IA5H5U7YEJTRQAFMWJ","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":"705266f70b04d7abef1f1f16b04d15efc98483425f6341a36f4b53fafe5f78fb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-06-16T00:35:42Z","title_canon_sha256":"c044f1ccd666208e84a6ac5ace7be13d16e7f375db8b308c16adc337047fddcf"},"schema_version":"1.0","source":{"id":"1806.06158","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1806.06158","created_at":"2026-05-18T00:12:13Z"},{"alias_kind":"arxiv_version","alias_value":"1806.06158v2","created_at":"2026-05-18T00:12:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.06158","created_at":"2026-05-18T00:12:13Z"},{"alias_kind":"pith_short_12","alias_value":"M7PV2GX7IA5H","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_16","alias_value":"M7PV2GX7IA5H5U7Y","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_8","alias_value":"M7PV2GX7","created_at":"2026-05-18T12:32:37Z"}],"graph_snapshots":[{"event_id":"sha256:f23edbb014137895ac5d19aa1a36e83c0106a4feb0d195ab0ad6a9c54dd5b79d","target":"graph","created_at":"2026-05-18T00:12:13Z","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":"Circumstellar environments are now routinely observed by dedicated high-contrast imagers on large, ground-based observatories. These facilities combine extreme adaptive optics and coronagraphy to achieve unprecedented sensitivities for exoplanet detection and spectral characterization. However, non-common path aberrations (NCPA) in these coronagraphic systems represent a critical limitation for the detection of giant planets with a contrast lower than a few $10^{-6}$ at very small separations ($<$0.3$^{\\prime\\prime}$) from their host star. In 2013 we proposed ZELDA, a Zernike wavefront sensor ","authors_text":"A. Vigan, D. Mouillet, G. Zins, J.-F. Sauvage, J.-L. Beuzit, J. Milli, K. Dohlen, M. N'Diaye, R. Pourcelot, Z. Wahhaj","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-06-16T00:35:42Z","title":"On-sky compensation of non-common path aberrations with the ZELDA wavefront sensor in VLT/SPHERE"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.06158","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":"sha256:8876dc932a565eeb10a8291aa41c10a4595a29676ad67b04c0b511e27e0b931e","target":"record","created_at":"2026-05-18T00:12:13Z","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":"705266f70b04d7abef1f1f16b04d15efc98483425f6341a36f4b53fafe5f78fb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-06-16T00:35:42Z","title_canon_sha256":"c044f1ccd666208e84a6ac5ace7be13d16e7f375db8b308c16adc337047fddcf"},"schema_version":"1.0","source":{"id":"1806.06158","kind":"arxiv","version":2}},"canonical_sha256":"67df5d1aff403a7ed3f822671800acb27fa3dfcf51cff2589f9a8a977f20026d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"67df5d1aff403a7ed3f822671800acb27fa3dfcf51cff2589f9a8a977f20026d","first_computed_at":"2026-05-18T00:12:13.425735Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:12:13.425735Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"AjZNfLZFUAgEOFXBZxu6I3Ks1f85cKk5eNifCUXsLKC5YkpBJ1ak5pQnMf4rMf8u2JdUEX324wYiddpIBxV/DA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:12:13.426457Z","signed_message":"canonical_sha256_bytes"},"source_id":"1806.06158","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8876dc932a565eeb10a8291aa41c10a4595a29676ad67b04c0b511e27e0b931e","sha256:f23edbb014137895ac5d19aa1a36e83c0106a4feb0d195ab0ad6a9c54dd5b79d"],"state_sha256":"74f41b972f56eb76ade6b1d440b9f05d0e3a3ba2a8a0ce2af5f23338a489866c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"h8VYtHzaSTXjf632UUqIr73eqLepsPbe1YRgET1kxn1Mu8z1ZRXt7K2e+09c7Muf/MxST84fP7CTISczpJyCCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T05:21:11.014801Z","bundle_sha256":"67a783b341fd769f9e09e4729fd3a77774b91e8aeca03478f5fd07e4624fbffb"}}