Fig. 1
Evolution of the average temperatures and hardness ratios (HR = H/S = FISMcor(2.−10.0 keV) /FISMcor(0.5−2. keV)) as a function of observed and absorption-corrected fluxes. Red open symbols correspond to Chandra data, while black filled symbols correspond to results from XMM-Newton observations. The values shown here correspond to the results from 4T fits (results are similar for the 2T fits).
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