{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:EDHIT2DX33KVKLZSI5NQ66MELC","short_pith_number":"pith:EDHIT2DX","canonical_record":{"source":{"id":"2507.08048","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2025-07-10T07:12:12Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"c899f26cd46501b71f2e265fd21616a064ab95939759b08e9acd44c6451aa312","abstract_canon_sha256":"04728d606223e767a1e90c114232f33f44e95bd93fbe2c8b3776bfc329d36880"},"schema_version":"1.0"},"canonical_sha256":"20ce89e877ded5552f32475b0f798458a703197517cb75c69d710e0f89056d36","source":{"kind":"arxiv","id":"2507.08048","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.08048","created_at":"2026-07-05T11:35:16Z"},{"alias_kind":"arxiv_version","alias_value":"2507.08048v1","created_at":"2026-07-05T11:35:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.08048","created_at":"2026-07-05T11:35:16Z"},{"alias_kind":"pith_short_12","alias_value":"EDHIT2DX33KV","created_at":"2026-07-05T11:35:16Z"},{"alias_kind":"pith_short_16","alias_value":"EDHIT2DX33KVKLZS","created_at":"2026-07-05T11:35:16Z"},{"alias_kind":"pith_short_8","alias_value":"EDHIT2DX","created_at":"2026-07-05T11:35:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:EDHIT2DX33KVKLZSI5NQ66MELC","target":"record","payload":{"canonical_record":{"source":{"id":"2507.08048","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2025-07-10T07:12:12Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"c899f26cd46501b71f2e265fd21616a064ab95939759b08e9acd44c6451aa312","abstract_canon_sha256":"04728d606223e767a1e90c114232f33f44e95bd93fbe2c8b3776bfc329d36880"},"schema_version":"1.0"},"canonical_sha256":"20ce89e877ded5552f32475b0f798458a703197517cb75c69d710e0f89056d36","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:35:16.410124Z","signature_b64":"28fLacrsbDVSeZ3U7KQNwSia3AT5m/6/DW5jJUNl4MKIMSzp4xlMBM6E9vOK4BzhvYGzTElqCz+3yJtbxAbrBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"20ce89e877ded5552f32475b0f798458a703197517cb75c69d710e0f89056d36","last_reissued_at":"2026-07-05T11:35:16.409647Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:35:16.409647Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2507.08048","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":"2026-07-05T11:35:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YqW/P4xQp/yf6mM/O58ZmgVIVg5ZeLY6Fmy5lBlYqIod3Br0uAiJSWbzaQ4Xm40qAX1TYsm6qpez3gUeyBVHBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T10:18:58.362651Z"},"content_sha256":"353b562ec4a0790cfbd7c03dc97a7aaaef115aec3925f9c79023a6a3de907bb8","schema_version":"1.0","event_id":"sha256:353b562ec4a0790cfbd7c03dc97a7aaaef115aec3925f9c79023a6a3de907bb8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:EDHIT2DX33KVKLZSI5NQ66MELC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A candidate field for deep imaging of the Epoch of Reionization observed with MWA","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.IM","authors_text":"Feiyu Zhao, Huanyuan Shan, Linhui Wu, Melanie Johnston-Hollitt, Mengfan He, Qian Zheng, Qingyuan Ma, Quan Guo, Stefan W.Duchesne, Xiang-Ping Wu, Xueying Zhang","submitted_at":"2025-07-10T07:12:12Z","abstract_excerpt":"Deep imaging of structures from the Cosmic Dawn (CD) and the Epoch of Reionization (EoR) in five targeted fields is one of the highest priority scientific objectives for the Square Kilometre Array (SKA). Selecting 'quiet' fields, which allow deep imaging, is critical for future SKA CD/EoR observations. Pre-observations using existing radio facilities will help estimate the computational capabilities required for optimal data quality and refine data reduction techniques. In this study, we utilize data from the Murchison Widefield Array (MWA) Phase II extended array for a selected field to study"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.08048","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/2507.08048/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":"2026-07-05T11:35:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"J8d0HxliKKFdDs/XQ59CCUG1CpOqFtGUSVN+MdHHtAxJsxF/UH621I4yW8+WbTRwDaQ94b2pBdplFknabUFFCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T10:18:58.363186Z"},"content_sha256":"09448d386a19be5bf09390fbd0dc5897fb9b6c74f0ecb1976a647dc870986d55","schema_version":"1.0","event_id":"sha256:09448d386a19be5bf09390fbd0dc5897fb9b6c74f0ecb1976a647dc870986d55"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EDHIT2DX33KVKLZSI5NQ66MELC/bundle.json","state_url":"https://pith.science/pith/EDHIT2DX33KVKLZSI5NQ66MELC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EDHIT2DX33KVKLZSI5NQ66MELC/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":"2026-08-22T10:18:58Z","links":{"resolver":"https://pith.science/pith/EDHIT2DX33KVKLZSI5NQ66MELC","bundle":"https://pith.science/pith/EDHIT2DX33KVKLZSI5NQ66MELC/bundle.json","state":"https://pith.science/pith/EDHIT2DX33KVKLZSI5NQ66MELC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EDHIT2DX33KVKLZSI5NQ66MELC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:EDHIT2DX33KVKLZSI5NQ66MELC","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":"04728d606223e767a1e90c114232f33f44e95bd93fbe2c8b3776bfc329d36880","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2025-07-10T07:12:12Z","title_canon_sha256":"c899f26cd46501b71f2e265fd21616a064ab95939759b08e9acd44c6451aa312"},"schema_version":"1.0","source":{"id":"2507.08048","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.08048","created_at":"2026-07-05T11:35:16Z"},{"alias_kind":"arxiv_version","alias_value":"2507.08048v1","created_at":"2026-07-05T11:35:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.08048","created_at":"2026-07-05T11:35:16Z"},{"alias_kind":"pith_short_12","alias_value":"EDHIT2DX33KV","created_at":"2026-07-05T11:35:16Z"},{"alias_kind":"pith_short_16","alias_value":"EDHIT2DX33KVKLZS","created_at":"2026-07-05T11:35:16Z"},{"alias_kind":"pith_short_8","alias_value":"EDHIT2DX","created_at":"2026-07-05T11:35:16Z"}],"graph_snapshots":[{"event_id":"sha256:09448d386a19be5bf09390fbd0dc5897fb9b6c74f0ecb1976a647dc870986d55","target":"graph","created_at":"2026-07-05T11:35:16Z","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/2507.08048/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Deep imaging of structures from the Cosmic Dawn (CD) and the Epoch of Reionization (EoR) in five targeted fields is one of the highest priority scientific objectives for the Square Kilometre Array (SKA). Selecting 'quiet' fields, which allow deep imaging, is critical for future SKA CD/EoR observations. Pre-observations using existing radio facilities will help estimate the computational capabilities required for optimal data quality and refine data reduction techniques. In this study, we utilize data from the Murchison Widefield Array (MWA) Phase II extended array for a selected field to study","authors_text":"Feiyu Zhao, Huanyuan Shan, Linhui Wu, Melanie Johnston-Hollitt, Mengfan He, Qian Zheng, Qingyuan Ma, Quan Guo, Stefan W.Duchesne, Xiang-Ping Wu, Xueying Zhang","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2025-07-10T07:12:12Z","title":"A candidate field for deep imaging of the Epoch of Reionization observed with MWA"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.08048","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":"sha256:353b562ec4a0790cfbd7c03dc97a7aaaef115aec3925f9c79023a6a3de907bb8","target":"record","created_at":"2026-07-05T11:35:16Z","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":"04728d606223e767a1e90c114232f33f44e95bd93fbe2c8b3776bfc329d36880","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2025-07-10T07:12:12Z","title_canon_sha256":"c899f26cd46501b71f2e265fd21616a064ab95939759b08e9acd44c6451aa312"},"schema_version":"1.0","source":{"id":"2507.08048","kind":"arxiv","version":1}},"canonical_sha256":"20ce89e877ded5552f32475b0f798458a703197517cb75c69d710e0f89056d36","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"20ce89e877ded5552f32475b0f798458a703197517cb75c69d710e0f89056d36","first_computed_at":"2026-07-05T11:35:16.409647Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:35:16.409647Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"28fLacrsbDVSeZ3U7KQNwSia3AT5m/6/DW5jJUNl4MKIMSzp4xlMBM6E9vOK4BzhvYGzTElqCz+3yJtbxAbrBA==","signature_status":"signed_v1","signed_at":"2026-07-05T11:35:16.410124Z","signed_message":"canonical_sha256_bytes"},"source_id":"2507.08048","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:353b562ec4a0790cfbd7c03dc97a7aaaef115aec3925f9c79023a6a3de907bb8","sha256:09448d386a19be5bf09390fbd0dc5897fb9b6c74f0ecb1976a647dc870986d55"],"state_sha256":"994646e5101dc110234cff3fc774237e2422ce317a1e91030abc719bb7ddec2e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZnBCuED8YUdpB4NEeoMZKzXqfW9WEUr/H0uybj1L3SzFkoFmeFSM5SJ3mapOSIjqgU5lzye3tuFFdp0sOXTxBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-22T10:18:58.368080Z","bundle_sha256":"d6f4d73163b7f34b24c5b95330ecf063e84407cfdc6803081096e52aadd46d49"}}