Catalog-level blinding on the bispectrum for DESI-like galaxy surveys

Sergi Novell-Masot, Hector Gil-Marin, Licia Verde, J. Aguilar, S. Ahlen, S. Brieden, D. Brooks, T. Claybaugh, A. de la Macorra, J. E. Forero-Romero, E. Gaztanaga, S. Gontcho A. Gontcho, G. Gutierrez, K. Honscheid, C. Howlett, R. Kehoe, T. Kisner, A. Lambert, M. E. Levi, M. ManeraA. Meisner, R. Miquel, G. Niz, F. Prada, G. Rossi, E. Sanchez, M. Schubnell, H. Seo, D. Sprayberry, G. Tarle, B. A. Weaver

Research output: Contribution to journalArticlepeer-review

11 Downloads (Pure)

Abstract

We evaluate the performance of the catalog-level blind analysis technique (blinding) presented in Brieden et al. (2020) in the context of a fixed template power spectrum and bispectrum analysis. This blinding scheme, which is tailored for galaxy redshift surveys similar to the Dark Energy Spectroscopic Instrument (DESI), has two components: the so-called "AP blinding" (concerning the dilation parameters α∥, α⊥) and "RSD blinding" (redshift space distortions, affecting the growth rate parameter f). Through extensive testing, including checks for the RSD part in cubic boxes, the impact of AP blinding on mocks with realistic survey sky coverage, and the implementation of a full AP+RSD blinding pipeline, our analysis demonstrates the effectiveness of the technique in preserving the integrity of cosmological parameter estimation when the analysis includes the bispectrum statistic. We emphasize the critical role of sophisticated — and difficult to accidentally unblind — blinding methods in precision cosmology.
Original languageEnglish
Article number089
Number of pages27
JournalJournal of Cosmology and Astroparticle Physics
Issue number10
DOIs
Publication statusPublished - 25 Oct 2024

Keywords

  • cosmological parameters from LSS
  • Power spectrum
  • Redshift surveys

Fingerprint

Dive into the research topics of 'Catalog-level blinding on the bispectrum for DESI-like galaxy surveys'. Together they form a unique fingerprint.

Cite this