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Fig. 2
Amplitude of the ISW temperature power 
(in μK2) for ℓ = 2 − 5. The solid line is the theoretical prediction, and the data points are estimated from 2MASS and NVSS galaxies with WMAP9 data are shown with Gaussian error bars assuming fsky = 0.66, i.e. the sky coverage of the NVSS survey.
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