{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:MXO5VNC3MXB47BQFSKD5LBMJOB","short_pith_number":"pith:MXO5VNC3","canonical_record":{"source":{"id":"1711.00421","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-11-01T16:25:52Z","cross_cats_sorted":["stat.AP"],"title_canon_sha256":"64e05b50cf61794b321311de7884f6d588dc18b20fab4540dcf7e6619f0da21b","abstract_canon_sha256":"20a0f72299cb448da279a955074e2b0c7c3ddd208c98673429c913d106fba113"},"schema_version":"1.0"},"canonical_sha256":"65dddab45b65c3cf86059287d58589706d23964f76a61fd09c6187686b8b265c","source":{"kind":"arxiv","id":"1711.00421","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.00421","created_at":"2026-05-18T00:10:32Z"},{"alias_kind":"arxiv_version","alias_value":"1711.00421v2","created_at":"2026-05-18T00:10:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.00421","created_at":"2026-05-18T00:10:32Z"},{"alias_kind":"pith_short_12","alias_value":"MXO5VNC3MXB4","created_at":"2026-05-18T12:31:31Z"},{"alias_kind":"pith_short_16","alias_value":"MXO5VNC3MXB47BQF","created_at":"2026-05-18T12:31:31Z"},{"alias_kind":"pith_short_8","alias_value":"MXO5VNC3","created_at":"2026-05-18T12:31:31Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:MXO5VNC3MXB47BQFSKD5LBMJOB","target":"record","payload":{"canonical_record":{"source":{"id":"1711.00421","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-11-01T16:25:52Z","cross_cats_sorted":["stat.AP"],"title_canon_sha256":"64e05b50cf61794b321311de7884f6d588dc18b20fab4540dcf7e6619f0da21b","abstract_canon_sha256":"20a0f72299cb448da279a955074e2b0c7c3ddd208c98673429c913d106fba113"},"schema_version":"1.0"},"canonical_sha256":"65dddab45b65c3cf86059287d58589706d23964f76a61fd09c6187686b8b265c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:10:32.182903Z","signature_b64":"tQaxoj5Bt81RGNTx4xdNg0MIuj5VFr66V+UiV83EjGuGU+ytL8ZgUV7WXLrIJ+y1dVi+0BizT4LnU8XQekwhAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"65dddab45b65c3cf86059287d58589706d23964f76a61fd09c6187686b8b265c","last_reissued_at":"2026-05-18T00:10:32.182170Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:10:32.182170Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1711.00421","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":"2026-05-18T00:10:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"py3gFD1HE7xfmqUpp94nOq+BbphRe1GSRr48WGCzLSZEg466en9GcPXB3A6zU37hHoiXr1aFmSl/Bhb7lU/YAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T18:46:57.682443Z"},"content_sha256":"cb2719458a79339fd5dbbfe5887a56e71b2831b18b7a7bc744577e729312f0bc","schema_version":"1.0","event_id":"sha256:cb2719458a79339fd5dbbfe5887a56e71b2831b18b7a7bc744577e729312f0bc"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:MXO5VNC3MXB47BQFSKD5LBMJOB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On the variance of radio interferometric calibration solutions: Quality-based Weighting Schemes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["stat.AP"],"primary_cat":"astro-ph.IM","authors_text":"Cyril Tasse, Etienne Bonnassieux, Oleg Smirnov, Philippe Zarka","submitted_at":"2017-11-01T16:25:52Z","abstract_excerpt":"This paper investigates the possibility of improving radio interferometric images using an algorithm inspired by an optical method known as \"lucky imaging\", which would give more weight to the best-calibrated visibilities used to make a given image. A fundamental relationship between the statistics of interferometric calibration solution residuals and those of the image-plane pixels is derived in this paper. This relationship allows us to understand and describe the statistical properties of the residual image. In this framework, the noise-map can be described as the Fourier transform of the c"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.00421","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":"2026-05-18T00:10:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qmRPL27aIE4uwlMYriQXXJrGynKSoAUhmXdAz3VFE3zQbcVgVGvSOU9AlgcSZsbsU/Tec3AbFDcKRu4iEf8FDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T18:46:57.683031Z"},"content_sha256":"5d5b2fad5f89f06b2e13bf1f2dfc5a1e92e05614aa9ef6701e9277846dd1e608","schema_version":"1.0","event_id":"sha256:5d5b2fad5f89f06b2e13bf1f2dfc5a1e92e05614aa9ef6701e9277846dd1e608"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MXO5VNC3MXB47BQFSKD5LBMJOB/bundle.json","state_url":"https://pith.science/pith/MXO5VNC3MXB47BQFSKD5LBMJOB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MXO5VNC3MXB47BQFSKD5LBMJOB/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":"2026-06-26T18:46:57Z","links":{"resolver":"https://pith.science/pith/MXO5VNC3MXB47BQFSKD5LBMJOB","bundle":"https://pith.science/pith/MXO5VNC3MXB47BQFSKD5LBMJOB/bundle.json","state":"https://pith.science/pith/MXO5VNC3MXB47BQFSKD5LBMJOB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MXO5VNC3MXB47BQFSKD5LBMJOB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:MXO5VNC3MXB47BQFSKD5LBMJOB","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":"20a0f72299cb448da279a955074e2b0c7c3ddd208c98673429c913d106fba113","cross_cats_sorted":["stat.AP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-11-01T16:25:52Z","title_canon_sha256":"64e05b50cf61794b321311de7884f6d588dc18b20fab4540dcf7e6619f0da21b"},"schema_version":"1.0","source":{"id":"1711.00421","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.00421","created_at":"2026-05-18T00:10:32Z"},{"alias_kind":"arxiv_version","alias_value":"1711.00421v2","created_at":"2026-05-18T00:10:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.00421","created_at":"2026-05-18T00:10:32Z"},{"alias_kind":"pith_short_12","alias_value":"MXO5VNC3MXB4","created_at":"2026-05-18T12:31:31Z"},{"alias_kind":"pith_short_16","alias_value":"MXO5VNC3MXB47BQF","created_at":"2026-05-18T12:31:31Z"},{"alias_kind":"pith_short_8","alias_value":"MXO5VNC3","created_at":"2026-05-18T12:31:31Z"}],"graph_snapshots":[{"event_id":"sha256:5d5b2fad5f89f06b2e13bf1f2dfc5a1e92e05614aa9ef6701e9277846dd1e608","target":"graph","created_at":"2026-05-18T00:10:32Z","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":"This paper investigates the possibility of improving radio interferometric images using an algorithm inspired by an optical method known as \"lucky imaging\", which would give more weight to the best-calibrated visibilities used to make a given image. A fundamental relationship between the statistics of interferometric calibration solution residuals and those of the image-plane pixels is derived in this paper. This relationship allows us to understand and describe the statistical properties of the residual image. In this framework, the noise-map can be described as the Fourier transform of the c","authors_text":"Cyril Tasse, Etienne Bonnassieux, Oleg Smirnov, Philippe Zarka","cross_cats":["stat.AP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-11-01T16:25:52Z","title":"On the variance of radio interferometric calibration solutions: Quality-based Weighting Schemes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.00421","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:cb2719458a79339fd5dbbfe5887a56e71b2831b18b7a7bc744577e729312f0bc","target":"record","created_at":"2026-05-18T00:10:32Z","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":"20a0f72299cb448da279a955074e2b0c7c3ddd208c98673429c913d106fba113","cross_cats_sorted":["stat.AP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-11-01T16:25:52Z","title_canon_sha256":"64e05b50cf61794b321311de7884f6d588dc18b20fab4540dcf7e6619f0da21b"},"schema_version":"1.0","source":{"id":"1711.00421","kind":"arxiv","version":2}},"canonical_sha256":"65dddab45b65c3cf86059287d58589706d23964f76a61fd09c6187686b8b265c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"65dddab45b65c3cf86059287d58589706d23964f76a61fd09c6187686b8b265c","first_computed_at":"2026-05-18T00:10:32.182170Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:10:32.182170Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"tQaxoj5Bt81RGNTx4xdNg0MIuj5VFr66V+UiV83EjGuGU+ytL8ZgUV7WXLrIJ+y1dVi+0BizT4LnU8XQekwhAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:10:32.182903Z","signed_message":"canonical_sha256_bytes"},"source_id":"1711.00421","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cb2719458a79339fd5dbbfe5887a56e71b2831b18b7a7bc744577e729312f0bc","sha256:5d5b2fad5f89f06b2e13bf1f2dfc5a1e92e05614aa9ef6701e9277846dd1e608"],"state_sha256":"bc1545e7c0bdf9536458460ba84dbaf8df6837f5e272b319cf100e8a558111ef"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"q+rvfNWKVh7m90D9R5SYTC6fyu1vMobduDltgWFH72MI5MaMVxI4A4+HzBkP4bHnzrWZYsKTlSe+B8imUwflAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-26T18:46:57.685756Z","bundle_sha256":"4cb69dc7b0af82d654df4408ec6b164b03f921f28bbbca71d420ed169dc37d68"}}