{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:JQNHD34RYUR6CMFO7535EPYV4O","short_pith_number":"pith:JQNHD34R","canonical_record":{"source":{"id":"2207.05591","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2022-07-12T15:12:08Z","cross_cats_sorted":[],"title_canon_sha256":"86efdd42dc3aea86ca7ad7094c2439d8f7c2ce12bde234f84431143e7c4ed45b","abstract_canon_sha256":"9b9566eb0974c6b4dcd92fdc71c6bdf9a205d0aae420bbc93c36a4ec02f3a9f1"},"schema_version":"1.0"},"canonical_sha256":"4c1a71ef91c523e130aeff77d23f15e39aebbd8eaa204ac195140ab9e794888d","source":{"kind":"arxiv","id":"2207.05591","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2207.05591","created_at":"2026-07-05T04:39:44Z"},{"alias_kind":"arxiv_version","alias_value":"2207.05591v1","created_at":"2026-07-05T04:39:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2207.05591","created_at":"2026-07-05T04:39:44Z"},{"alias_kind":"pith_short_12","alias_value":"JQNHD34RYUR6","created_at":"2026-07-05T04:39:44Z"},{"alias_kind":"pith_short_16","alias_value":"JQNHD34RYUR6CMFO","created_at":"2026-07-05T04:39:44Z"},{"alias_kind":"pith_short_8","alias_value":"JQNHD34R","created_at":"2026-07-05T04:39:44Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:JQNHD34RYUR6CMFO7535EPYV4O","target":"record","payload":{"canonical_record":{"source":{"id":"2207.05591","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2022-07-12T15:12:08Z","cross_cats_sorted":[],"title_canon_sha256":"86efdd42dc3aea86ca7ad7094c2439d8f7c2ce12bde234f84431143e7c4ed45b","abstract_canon_sha256":"9b9566eb0974c6b4dcd92fdc71c6bdf9a205d0aae420bbc93c36a4ec02f3a9f1"},"schema_version":"1.0"},"canonical_sha256":"4c1a71ef91c523e130aeff77d23f15e39aebbd8eaa204ac195140ab9e794888d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:39:44.302298Z","signature_b64":"rMWWwMOtBducv1FEcPMgChOM5rgoghiMCAIy9IQwB+1qMaOwFjYRAJQfF42S5bYnNLNzI9E3Xuu5hOEoiYheDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4c1a71ef91c523e130aeff77d23f15e39aebbd8eaa204ac195140ab9e794888d","last_reissued_at":"2026-07-05T04:39:44.301917Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:39:44.301917Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2207.05591","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":"2026-07-05T04:39:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xLXmap8NFPGQl/o801LTiPSA274eRg8g3I5CYjWFfHlhLzVNOYAH3y7ncPsvWS6TaQYNAx23+ZuDpHcjRNmxCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T12:28:10.290297Z"},"content_sha256":"22d0e5efa2ab22b7c5294d5994813a45acb643fc09b45d3f3f4b507eb9234179","schema_version":"1.0","event_id":"sha256:22d0e5efa2ab22b7c5294d5994813a45acb643fc09b45d3f3f4b507eb9234179"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:JQNHD34RYUR6CMFO7535EPYV4O","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Self-calibration and improving image fidelity for ALMA and other radio interferometers","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"A. F. P\\'erez-S\\'anchez, A. M. S. Richards, E. B. Fomalont, E. Moravec, M. C. Toribio, R. A. Laing, S. Etoka","submitted_at":"2022-07-12T15:12:08Z","abstract_excerpt":"This manual is intended to help ALMA and other interferometer users improve images by recognising limitations and how to overcome them and deciding when and how to use self-calibration. The images provided by the ALMA Science Archive are calibrated using standard observing and data processing routines, including a quality assurance process to make sure that the observations meet the proposer's science requirements. This may not represent the full potential of the data, since any interferometry observation can be imaged with a range of resolutions and surface brightness sensitivity. The separat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2207.05591","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/2207.05591/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":"2026-07-05T04:39:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"c6ac7rW4t0a14Rr72hu70ABLd3/egjS9tS94ei1p+f87+svVcWGqbpQNanETcUc9/11i7kmN+vubNYswzE7QBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T12:28:10.290698Z"},"content_sha256":"a8f26a9800b773bed08dc4116ebbf2c9a0c8f1a42ae8f263bffa7430ae85f21a","schema_version":"1.0","event_id":"sha256:a8f26a9800b773bed08dc4116ebbf2c9a0c8f1a42ae8f263bffa7430ae85f21a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JQNHD34RYUR6CMFO7535EPYV4O/bundle.json","state_url":"https://pith.science/pith/JQNHD34RYUR6CMFO7535EPYV4O/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JQNHD34RYUR6CMFO7535EPYV4O/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":"2026-07-06T12:28:10Z","links":{"resolver":"https://pith.science/pith/JQNHD34RYUR6CMFO7535EPYV4O","bundle":"https://pith.science/pith/JQNHD34RYUR6CMFO7535EPYV4O/bundle.json","state":"https://pith.science/pith/JQNHD34RYUR6CMFO7535EPYV4O/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JQNHD34RYUR6CMFO7535EPYV4O/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:JQNHD34RYUR6CMFO7535EPYV4O","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":"9b9566eb0974c6b4dcd92fdc71c6bdf9a205d0aae420bbc93c36a4ec02f3a9f1","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2022-07-12T15:12:08Z","title_canon_sha256":"86efdd42dc3aea86ca7ad7094c2439d8f7c2ce12bde234f84431143e7c4ed45b"},"schema_version":"1.0","source":{"id":"2207.05591","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2207.05591","created_at":"2026-07-05T04:39:44Z"},{"alias_kind":"arxiv_version","alias_value":"2207.05591v1","created_at":"2026-07-05T04:39:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2207.05591","created_at":"2026-07-05T04:39:44Z"},{"alias_kind":"pith_short_12","alias_value":"JQNHD34RYUR6","created_at":"2026-07-05T04:39:44Z"},{"alias_kind":"pith_short_16","alias_value":"JQNHD34RYUR6CMFO","created_at":"2026-07-05T04:39:44Z"},{"alias_kind":"pith_short_8","alias_value":"JQNHD34R","created_at":"2026-07-05T04:39:44Z"}],"graph_snapshots":[{"event_id":"sha256:a8f26a9800b773bed08dc4116ebbf2c9a0c8f1a42ae8f263bffa7430ae85f21a","target":"graph","created_at":"2026-07-05T04:39:44Z","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/2207.05591/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"This manual is intended to help ALMA and other interferometer users improve images by recognising limitations and how to overcome them and deciding when and how to use self-calibration. The images provided by the ALMA Science Archive are calibrated using standard observing and data processing routines, including a quality assurance process to make sure that the observations meet the proposer's science requirements. This may not represent the full potential of the data, since any interferometry observation can be imaged with a range of resolutions and surface brightness sensitivity. The separat","authors_text":"A. F. P\\'erez-S\\'anchez, A. M. S. Richards, E. B. Fomalont, E. Moravec, M. C. Toribio, R. A. Laing, S. Etoka","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2022-07-12T15:12:08Z","title":"Self-calibration and improving image fidelity for ALMA and other radio interferometers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2207.05591","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":"sha256:22d0e5efa2ab22b7c5294d5994813a45acb643fc09b45d3f3f4b507eb9234179","target":"record","created_at":"2026-07-05T04:39:44Z","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":"9b9566eb0974c6b4dcd92fdc71c6bdf9a205d0aae420bbc93c36a4ec02f3a9f1","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2022-07-12T15:12:08Z","title_canon_sha256":"86efdd42dc3aea86ca7ad7094c2439d8f7c2ce12bde234f84431143e7c4ed45b"},"schema_version":"1.0","source":{"id":"2207.05591","kind":"arxiv","version":1}},"canonical_sha256":"4c1a71ef91c523e130aeff77d23f15e39aebbd8eaa204ac195140ab9e794888d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4c1a71ef91c523e130aeff77d23f15e39aebbd8eaa204ac195140ab9e794888d","first_computed_at":"2026-07-05T04:39:44.301917Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:39:44.301917Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rMWWwMOtBducv1FEcPMgChOM5rgoghiMCAIy9IQwB+1qMaOwFjYRAJQfF42S5bYnNLNzI9E3Xuu5hOEoiYheDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T04:39:44.302298Z","signed_message":"canonical_sha256_bytes"},"source_id":"2207.05591","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:22d0e5efa2ab22b7c5294d5994813a45acb643fc09b45d3f3f4b507eb9234179","sha256:a8f26a9800b773bed08dc4116ebbf2c9a0c8f1a42ae8f263bffa7430ae85f21a"],"state_sha256":"deb062636cdb0596ddfab112947213b4b49629c7a0f8c18b74b6235c4183869e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DXuVZTokuxjT7jeEngKTBAfiaaGP4OcW4PaDbeuEpDCzGcIaEu8gP2iEm56zlFff6QDHdXt4XNUZBt3B72OzBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-06T12:28:10.292626Z","bundle_sha256":"866c01af350b1c9ba737c8593d9d51f47e11c9170d6c0b1fac06159830b87b9a"}}