  The NuSTAR mission performed a long (200 ks) observation of the Arches
stellar cluster in 2015. The emission from the cluster represents a mixture of
bright thermal (kT~2 keV) X-rays and the extended non-thermal radiation of the
molecular cloud around the cluster. In this work we describe the method used to
decouple spatially confused emission of the stellar cluster and the molecular
cloud in the NuSTAR data.
