Joint XMM-Newton NuStar view of HESS J0632+057

We propose to perform 25 ksec NuStar and 20virgulksec XMMNewton observations ofgammaray binary HESS J)632+057 prior to its high state in 2018. We aim todetect the break in the spectral slope of the system as the compact objectapproaches the disk of Be star. The detection of the break in Xray synchrotronspectral component will allow to test the physical model of the source and makepredictions for the position of GeVTeV break, which could be tested withHESS/MAGIC data.