{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:LKF5P77YFPAAJSA7ECUEEQZIUA","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":"db42186d3f13ee2b06fa22e13e4a7e9dfa9296969a56b013410d09e18fb90f4e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-07-14T00:19:16Z","title_canon_sha256":"56859559b2204949086792b754cb8a43b806da62f465fa6fb0aff3d8417712bf"},"schema_version":"1.0","source":{"id":"1807.05312","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.05312","created_at":"2026-05-18T00:07:06Z"},{"alias_kind":"arxiv_version","alias_value":"1807.05312v1","created_at":"2026-05-18T00:07:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.05312","created_at":"2026-05-18T00:07:06Z"},{"alias_kind":"pith_short_12","alias_value":"LKF5P77YFPAA","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_16","alias_value":"LKF5P77YFPAAJSA7","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_8","alias_value":"LKF5P77Y","created_at":"2026-05-18T12:32:37Z"}],"graph_snapshots":[{"event_id":"sha256:3e28c7fb694d4adbc4e38842b15c2a8f793f7a796d6cfc92708357d973eec146","target":"graph","created_at":"2026-05-18T00:07:06Z","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":"Interferometric arrays seeking to measure the 21 cm signal from the Epoch of Reionization must contend with overwhelmingly bright emission from foreground sources. Accurate recovery of the 21 cm signal will require precise calibration of the array, and several new avenues for calibration have been pursued in recent years, including methods using redundancy in the antenna configuration. The newly upgraded Phase II of Murchison Widefield Array (MWA) is the first interferometer that has large numbers of redundant baselines while retaining good instantaneous UV-coverage. This array therefore provi","authors_text":"A. Ewall-Wice, A. Lanman, A. Neben, A. P. Beardsley, A. R. Offringa, A. R. Parsons, A. Williams, B. Crosse, B. J. Hazelton, B. McKinley, B. Pindor, C. Jordan, C. Trott, C. Wu, D. A. Mitchell, D. C. Jacobs, D. Emrich, D. Kenney, D. L. Kaplan, D. Pallot, F. Briggs, H. Kim, I. Sullivan, J. C. Pober, J. D. Bowman, J. Line, J. N. Hewitt, J. Riding, J. S. Dillon, K. Steele, L. Feng, L. Horsley, M. F. Morales, M. Johnston-Hollitt, M. Rahimi, M. Tegmark, M. Walker, N. Barry, N. Thyagarajan, N. Udaya Shankar, P. Carroll, P. Kittiwisit, P. Procopio, R. B. Wayth, R. Byrne, R. C. Joseph, R. L. Webster, R. Subrahmanian, S. J. Tingay, S. K. Sethi, S. Murray, S. Paul, S. Wyithe, T. M. O. Franzen, W. Li, Z. S. Ali","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-07-14T00:19:16Z","title":"Comparing Redundant and Sky Model Based Interferometric Calibration: A First Look with Phase II of the MWA"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.05312","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:f07217d5f721ddc1987156dcade22da93318cd25385e2ea63bad5eb60e90ec28","target":"record","created_at":"2026-05-18T00:07:06Z","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":"db42186d3f13ee2b06fa22e13e4a7e9dfa9296969a56b013410d09e18fb90f4e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-07-14T00:19:16Z","title_canon_sha256":"56859559b2204949086792b754cb8a43b806da62f465fa6fb0aff3d8417712bf"},"schema_version":"1.0","source":{"id":"1807.05312","kind":"arxiv","version":1}},"canonical_sha256":"5a8bd7fff82bc004c81f20a8424328a03cbe848537b157dfcb7d0337bcbd7d63","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5a8bd7fff82bc004c81f20a8424328a03cbe848537b157dfcb7d0337bcbd7d63","first_computed_at":"2026-05-18T00:07:06.057853Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:07:06.057853Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0ofo90OG3CPWWOpQHRuZnUaT64Q8XNL+EFyJXO0HNTpU3FauZxqgQvfzKStBzOupvI6MsNEd9uNJF0MShSlsBw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:07:06.058448Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.05312","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f07217d5f721ddc1987156dcade22da93318cd25385e2ea63bad5eb60e90ec28","sha256:3e28c7fb694d4adbc4e38842b15c2a8f793f7a796d6cfc92708357d973eec146"],"state_sha256":"13a157c7519bc86136d19b534aa8405e4556217ab4d6af4024ff8f08af43cdaf"}