{"paper":{"title":"Semi-analytical covariance matrices for two-point correlation function for DESI 2024 data","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["physics.data-an"],"primary_cat":"astro-ph.CO","authors_text":"A. de la Macorra, A. de Mattia, A. D. Myers, A. Font-Ribera, A. J. Ross, A. Kremin, A. Mu\\~noz-Guti\\'errez, A. P\\'erez-Fern\\'andez, A. Rosado-Marin, A. X. Gonzalez-Morales, B. A. Weaver, C. Garcia-Quintero, C. Howlett, C. Poppett, C. Saulder, C. Zhao, D. Brooks, D. Forero-S\\'anchez, D. J. Eisenstein, D. Schlegel, D. Sprayberry, E. Burtin, E. Mueller, E. Paillas, E. Sanchez, G. Gutierrez, G. Niz, G. Rossi, G. Tarl\\'e, H. Gil-Mar\\'in, H. Seo, H. Zou, J. Aguilar, J. E. Forero-Romero, J. Mena-Fern\\'andez, J. Nie, J. Yu, K. Fanning, K. Honscheid, L. Le Guillou, L. Medina-Varela, M. Manera, M. Rashkovetskyi, M. Rezaie, M. Schubnell, N. Padmanabhan, O. Alves, P. Doel, R. Miquel, R. Ruggeri, S. Ahlen, S. Cole, S. Ferraro, S. Gontcho A Gontcho, S. Juneau, T. Claybaugh, U. Andrade, W. J. Percival, X. Chen, Z. Ding","submitted_at":"2024-04-03T18:41:56Z","abstract_excerpt":"We present an optimized way of producing the fast semi-analytical covariance matrices for the Legendre moments of the two-point correlation function, taking into account survey geometry and mimicking the non-Gaussian effects. We validate the approach on simulated (mock) catalogs for different galaxy types, representative of the Dark Energy Spectroscopic Instrument (DESI) Data Release 1, used in 2024 analyses. We find only a few percent differences between the mock sample covariance matrix and our results, which can be expected given the approximate nature of the mocks, although we do identify "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2404.03007","kind":"arxiv","version":5},"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/2404.03007/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"}