High Energy Astrophysics
(A.M. Beloborodov, C.-I. Björnsson, L. Borgonovo, S. Larsson, J. Poutanen, F. Ryde, B.E. Stern, R. Svensson, Y. Tikhomirova)

The group specializes in observational and theoretical high energy astrophysics with emphasis on radiation processes in highly energetic plasmas and the interpretation of the broad band observations of active galactic nuclei (AGN), X-ray binaries, and $\gamma$-ray bursts. Observations are both space-based (ASCA, CGRO, RXTE) and ground-based (NOT, ESO, etc.). Archival data are also used.