Euclid: The linear-construction covariance and cosmology
V. Lindholm, Elina Sihvola, J. Valiviita, A. Fumagalli et autres
We study the properties of galaxy cluster two-point correlation function covariance matrices estimated using the linear-construction (LC) method, which is computationally up to 20 times faster than the standard sample-covariance method. Our goal is to assess how well the LC method performs …