Chandra surface brightness fit of double β-model in 0.5–2.5 keV energy band in circular region with r = 4′. Projected surface brightness (dotted black curve); the double β-model (red); the β-model corresponding to the ICM (green); the second β-model corresponding to the corona (yellow); the double β-model with α parameter is set to zero (light blue); the β-model of the ICM with α parameter is set to zero (dark blue).