Background-subtracted light curves of Haro 11 binned at 3.6 ks in the S + M and M + H bands (in counts; upper panels), along with the hardness ratios HR₁ and HR₂ (lower panels) defined by Eqs. (1) obtained from the XMM-Newton and Chandra source and background light curves using the Bayesian quadrature method of the BEHR. The light curves of the later observations were scaled up based on the instrument effective areas relative to the first one. The observation identifiers are given in the top panels.