Map of the value of the α parameter in the wdem model with β fixed to 0.1. The higher the α parameter, the higher the relative contribution of cooler components in the spectrum. The error on the α parameter is less than 30% across the image, except for the bins where the value of α is nearly zero. These bins are within 2σ significance consistent with their neighbours which have higher α values. In the central region, the typical uncertainty is less than 10%. In the core, a star symbol marks the centre of the main cD galaxy and the white arrow points out the bins with the highest α value.