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We analysed the Suzaku XIS1 data of the A3112 cluster of galaxies in order toexamine the X-ray excess emission in this cluster reported earlier with theXMM-Newton and Chandra satellites. The best-fit temperature of the intraclustergas depends strongly on the choice of the energy band used for the spectralanalysis. This proves the existence of excess emission component in addition tothe single-temperature MEKAL in A3112. We showed that this effect is not anartifact due to uncertainties of the background modeling, instrumentcalibration or the amount of Galactic absorption. Neither does the PSF scatterof the emission from the cool core nor the projection of the cool gas in thecluster outskirts produce the effect. Finally we modeled the excess emissioneither by using an additional MEKAL or powerlaw component. Due to the smalldifferencies between thermal and non-thermal model we can not rule out thenon-thermal origin of the excess emission based on the goodness of the fit.Assuming that it has a thermal origin, we further examined the DifferentialEmission Measure (DEM) models. We utilised two different DEM models, a Gaussiandifferential emission measure distribution (GDEM) and WDEM model, where theemission measure of a number of thermal components is distributed as atruncated power law. The best-fit XIS1 MEKAL temperature for the 0.4-7.0 keVband is 4.7+-0.1 keV, consistent with that obtained using GDEM and WDEM models.

Suzaku observations of X-ray excess emission in the cluster of galaxies A3112