Measured CIB×CMB cross-correlation and corresponding error bars for the GASS CIB field (blue points). The predicted signal (given by Eq. (11)) is shown in red. The error bars on the predicted signal are calculated using the noise term in Eq. (39). Following Planck Collaboration XXX (2014), we assumed that the CIB power spectrum is contaminated by dust residuals at the level of 10% when the theoretical error bars were calculated.