Recent and Future Observations in the X‐ray and Gamma‐ray Bands: Chandra, Suzaku, GLAST, and NuSTAR

This paper presents a brief overview of the accomplishments of the Chandra satellite that are shedding light on the origin of high energy particles in astrophysical sources, with the emphasis on clusters of galaxies. It also discusses the prospects for the new data to be collected with instruments recently launched — such as Suzaku — or those to be deployed in the near future, and this includes GLAST and NuSTAR.