Inadequacy of internal covariance estimation for super-sample covariance

Lacasa, F; Kunz, M

Lacasa, F (reprint author), Univ Geneva, Dept Phys Theor, 24 Quai Ernest Ansermet, CH-1211 Geneva, Switzerland.

ASTRONOMY & ASTROPHYSICS, 2017; 604 ( ):

Abstract

We give an analytical interpretation of how subsample-based internal covariance estimators lead to biased estimates of the covariance, due to underest......

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