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Title: Testing local anisotropy using the method of smoothed residuals I — methodology

We discuss some details regarding the method of smoothed residuals, which has recently been used to search for anisotropic signals in low-redshift distance measurements (Supernovae). In this short note we focus on some details regarding the implementation of the method, particularly the issue of effectively detecting signals in data that are inhomogeneously distributed on the sky. Using simulated data, we argue that the original method proposed in Colin et al. [1] will not detect spurious signals due to incomplete sky coverage, and that introducing additional Gaussian weighting to the statistic as in [2] can hinder its ability to detect a signal. Issues related to the width of the Gaussian smoothing are also discussed.
Authors:
;  [1]
  1. Asia Pacific Center for Theoretical Physics, Hogil Kim Memorial Building #501, POSTECH, Pohang, Gyeongbuk, 790-784 (Korea, Republic of)
Publication Date:
OSTI Identifier:
22370664
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2014; Journal Issue: 03; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ANISOTROPY; DISTANCE; IMPLEMENTATION; RED SHIFT; SIGNALS; SIMULATION; SKY; SUPERNOVAE; TESTING