We report on the association of an X-ray source (WGA J2025.1+3342), serendipitously found with BeppoSAX in two separate observations, with the unidentified EGRET source 3EG J2027+3429. The source is detected from 1 keV up to about 100 keV, has a flat (Γ=0.6-1.5) spectrum and is highly variable both in intensity and shape. The data indicate marginal evidence for an iron line in the source rest f...

Stroemgren defined a model made up of an extremely hot source plunged in a constant density, huge, static cloud of low pressure hydrogen. The present studies of this model apply qualitatively with relatively small and cold sources, but without these assumptions, we must take into account that:-the source has, at all frequencies, the spectral radiance of a laser at a single frequency, so that th...

The energy spectrum of cosmic rays is steeply falling with a suppression the flux at highest energies caused by losses during propagation or reaching maximum accelerators. currently measured high precision two experiments, Telescope Array in Northern hemisphere and Pierre Auger Observatory Southern hemisphere. In this work, we study possibility explaining shape above 10 19.5 eV single source. U...