Analysis of BOSS Galaxy Data with Weighted Skew-Spectra

• DOI: 10.48550/arxiv.2401.13036
• Publication Date: 2024-01-01
• Authors: Shu-Fan Chen; Priyesh Chakraborty; Cora Dvorkin

We present the first application of weighted skew-spectra to analyze non-Gaussian information in galaxy survey data. Using tree-level together with one-loop power spectrum multipoles, we Sloan Digital Sky Survey (SDSS)-III Baryon Oscillation Spectroscopic (BOSS) clustering data, and target our search towards equilateral bispectrum shape primordial non-Gaussianity. use Effective Field Theory model for bispectrum, account systematic effects, such as geometry. From likelihood analysis, find $f_{\rm NL}^{\rm equil}=-34^{+296}_{-334}$ at $68\%$ CL, consistent previous works, while errors from treatment geometry lead an unreliable estimation ortho}$. further constrain bias counterterm parameters, keeping cosmology fixed $\textit{Planck }2018$ values. As a check, also validate analysis pipeline using ${\tt Nseries}$ simulation suite.