{"paper":{"title":"The Rapid ASKAP Continuum Survey VII: Spectra and Polarisation In Cutouts of Extragalactic Sources (SPICE-RACS) Second Data Release -- Unveiling the Magnetised Sky","license":"http://creativecommons.org/licenses/by/4.0/","headline":"SPICE-RACS DR2 produces the largest Faraday rotation measure catalog yet, with 250,000 entries covering 87.5 percent of the sky.","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Alec J.M. Thomson, B. M. Gaensler, C. L. Van Eck, Craig S. Anderson, Emil Lenc, Erik Osinga, George Heald, J. L. West, J. P. Leahy, Lerato Baidoo, L. Rudnick, N. M. McClure-Griffiths, Ondrej Hlinka, Sebastian Hutschenreuter, Shane P. O'Sullivan, Stefan W. Duchesne, Sunil Malik, Takuya Akahori, Timothy J. Galvin, Vanessa A. Moss, Y. K. Ma","submitted_at":"2026-05-16T10:13:47Z","abstract_excerpt":"We present the second data release (DR2) of Spectra and Polarisation in Cutouts of Extragalactic sources from RACS (SPICE-RACS). SPICE-RACS DR2 is derived from the third low-band epoch of the Rapid ASKAP Continuum Survey (RACS-low3) and covers the entire sky from the South celestial pole up to a declination of $+49^\\circ$; approximately 87.5% of the celestial sphere. We produce 'cutout' spectral cubes in Stokes $I$, $Q$, $U$ around 4 million radio sources and extract spectra towards 5 million radio components. Across our observed band of 799.5--1087.5 MHz we find an $rms$ noise of $\\sim200\\mu\\"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"This places SPICE-RACS DR2 as the largest single RM catalogue ever produced by nearly an order of magnitude; the number of RMs in our catalogue alone is ∼5 times larger than every previous RM catalogue combined.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The de-duplication and polarization extraction process correctly identifies reliable RMs without significant contamination from residual instrumental polarization or source confusion, as stated in the description of the 0.1% residual level and 8-sigma threshold.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"SPICE-RACS DR2 produces the largest single Faraday rotation measure catalog to date from RACS-low3 observations, with 2.5e5 RMs at 6.7 per square degree over most of the southern sky.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"SPICE-RACS DR2 produces the largest Faraday rotation measure catalog yet, with 250,000 entries covering 87.5 percent of the sky.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"61fd28d1b3a27de1521479c36105c085d8f152cd18251cea4ccfb0d1ac317c31"},"source":{"id":"2605.16917","kind":"arxiv","version":1},"verdict":{"id":"888e302e-dede-486f-9894-e9682ebb3341","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-19T20:58:20.195023Z","strongest_claim":"This places SPICE-RACS DR2 as the largest single RM catalogue ever produced by nearly an order of magnitude; the number of RMs in our catalogue alone is ∼5 times larger than every previous RM catalogue combined.","one_line_summary":"SPICE-RACS DR2 produces the largest single Faraday rotation measure catalog to date from RACS-low3 observations, with 2.5e5 RMs at 6.7 per square degree over most of the southern sky.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The de-duplication and polarization extraction process correctly identifies reliable RMs without significant contamination from residual instrumental polarization or source confusion, as stated in the description of the 0.1% residual level and 8-sigma threshold.","pith_extraction_headline":"SPICE-RACS DR2 produces the largest Faraday rotation measure catalog yet, with 250,000 entries covering 87.5 percent of the sky."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2605.16917/integrity.json","findings":[],"available":true,"detectors_run":[{"name":"doi_title_agreement","ran_at":"2026-05-19T21:31:19.162743Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"doi_compliance","ran_at":"2026-05-19T21:11:36.907245Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"cited_work_retraction","ran_at":"2026-05-19T20:51:56.686353Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"claim_evidence","ran_at":"2026-05-19T18:41:56.264738Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"ai_meta_artifact","ran_at":"2026-05-19T18:33:26.344996Z","status":"skipped","version":"1.0.0","findings_count":0}],"snapshot_sha256":"747c185df4cf416aa2213e1a84b187d98c793dc82f4c3965a2564387df1f9fa5"},"references":{"count":297,"sample":[{"doi":"10.1086/190709","year":null,"title":"doi:10.1086/190709 , journal =","work_id":"43ed5e8c-e78f-491c-858f-ba6310b09d55","ref_index":1,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"10.1007/bf00639497","year":null,"title":"doi:10.1007/BF00639497 , journal =","work_id":"26fd8222-feb2-48ef-a439-4fc9414c8488","ref_index":2,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"10.1086/171000","year":null,"title":"doi:10.1086/171000 , journal =","work_id":"1bac0456-dcd5-4db9-a8c1-cef82be10c9d","ref_index":3,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"10.1086/175726","year":null,"title":"doi:10.1086/175726 , journal =","work_id":"de0691ce-c70c-463e-9d5d-70acd39a05b4","ref_index":4,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"10.1086/176803","year":null,"title":"doi:10.1086/176803 , journal =","work_id":"4ee082d6-ce2f-4f80-bef0-10c53a7518dd","ref_index":5,"cited_arxiv_id":"","is_internal_anchor":false}],"resolved_work":297,"snapshot_sha256":"12034a666c9c2c5893f51c811548859c77a126d9d9986e976577946992b91083","internal_anchors":94},"formal_canon":{"evidence_count":1,"snapshot_sha256":"d07a8a56e4e89629d2881b61749c8ffd0d59ab5f45edcf6277dabd6bcab3e72e"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}