{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:2WXFYKRBJWY3ILJ3DXMCDX2VD5","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":"341b76a056c2900732c62c339aede86c334725e32bee9d9d63f09e7f4ccb48e8","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-02-22T01:53:28Z","title_canon_sha256":"5614881f017be350689ce832c6f55e8d8c8bbac7c4758b455380199fca55801f"},"schema_version":"1.0","source":{"id":"1602.06624","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.06624","created_at":"2026-05-18T00:55:14Z"},{"alias_kind":"arxiv_version","alias_value":"1602.06624v3","created_at":"2026-05-18T00:55:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.06624","created_at":"2026-05-18T00:55:14Z"},{"alias_kind":"pith_short_12","alias_value":"2WXFYKRBJWY3","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_16","alias_value":"2WXFYKRBJWY3ILJ3","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_8","alias_value":"2WXFYKRB","created_at":"2026-05-18T12:29:55Z"}],"graph_snapshots":[{"event_id":"sha256:8e76fab8a5617eb7451e982d22c1406499bf06064e27ac8e11d5b0c55db70fca","target":"graph","created_at":"2026-05-18T00:55:14Z","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":"We present a catalog of 624 radio sources detected around the North Celestial Pole (NCP) with the 21 Centimeter Array (21CMA), a radio interferometer dedicated to the statistical measurement of the epoch of reionization (EoR). The data are taken from a 12 h observation made on 2013 April 13, with a frequency coverage from 75 to 175 MHz and an angular resolution of ~ 4 arcmin. The catalog includes flux densities at eight sub-bands across the 21CMA bandwidth and provides the in-band spectral indices for the detected sources. To reduce the complexity of interferometric imaging from the so-called ","authors_text":"Haiguang Xu, Jun-Hua Gu, Melanie Johnston-Hollitt, Qian Zheng, Xiang-Ping Wu","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-02-22T01:53:28Z","title":"Radio Sources in the NCP Region Observed with the 21 Centimeter Array"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.06624","kind":"arxiv","version":3},"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":"sha256:229ec2593da64bc29e9b6e5de0924ca5470d89181f780f8ebe3be60bbae4ba9d","target":"record","created_at":"2026-05-18T00:55:14Z","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":"341b76a056c2900732c62c339aede86c334725e32bee9d9d63f09e7f4ccb48e8","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-02-22T01:53:28Z","title_canon_sha256":"5614881f017be350689ce832c6f55e8d8c8bbac7c4758b455380199fca55801f"},"schema_version":"1.0","source":{"id":"1602.06624","kind":"arxiv","version":3}},"canonical_sha256":"d5ae5c2a214db1b42d3b1dd821df551f648a408d776c5e238597808ebd00c8a7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d5ae5c2a214db1b42d3b1dd821df551f648a408d776c5e238597808ebd00c8a7","first_computed_at":"2026-05-18T00:55:14.148288Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:55:14.148288Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LMtUuCVwWuiK+YIzhFz7P26sePP1K2JzTYeANrsis5ymzKNOjPpOQuk1orO4oKdk2voIuyL5LKFEyHXhYOa4DQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:55:14.148775Z","signed_message":"canonical_sha256_bytes"},"source_id":"1602.06624","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:229ec2593da64bc29e9b6e5de0924ca5470d89181f780f8ebe3be60bbae4ba9d","sha256:8e76fab8a5617eb7451e982d22c1406499bf06064e27ac8e11d5b0c55db70fca"],"state_sha256":"834c49713af591bf94abbd4214f5dd461e653601a908f8b89d638c46350d66c3"}