The Effect of Slitless Spectroscopic Redshift Uncertainty and Interlopers on BAO Measurements from CSST-like Samples

arXiv:2608.24276 · astro-ph.CO · Submitted 2026-08-25 · Read on arXiv

astro-ph.CO

Submitted: 2026-08-25

Updated: 2026-08-25

Comments: 14 pages, 6 (and 7 supplementary) figures, accepted by MNRAS

DOI: 10.1093/mnras/stag1603

Code: https://github.com/cosmodesi/pyrecon

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Systematic Bias — 10× in this paper · explained in 3 episodes
• Clustering — 5× in this paper · explained in 2 episodes
• Chinese Space Station Survey Telescope — 3× in this paper
• Dark Energy Spectroscopic Instrument — 1× in this paper
• Fingers of God — 1× in this paper
• Matter Power Spectrum — 1× in this paper · explained in 2 episodes
• Reconstruction Error — 1× in this paper · explained in 2 episodes

Sources

• Extensive analysis of reconstruction algorithms for DESI 2024 baryon acoustic oscillations
• DESI DR2 Results II: Measurements of Baryon Acoustic Oscillations and Cosmological Constraints
• The Impact of Spectroscopic Redshift Errors on Cosmological Measurements
• Optimal Reconstruction of Baryon Acoustic Oscillations for DESI 2024
• Filtering Interlopers with Photometry and Diagnostic Features: A Machine Learning Framework Validated with CSST Slitless Spectroscopy
• Wide-Field InfrarRed Survey Telescope-Astrophysics Focused Telescope Assets WFIRST-AFTA 2015 Report

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