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An apparently normal γ-ray burst with an unusually low luminosity

Sunyaev, R. A.; Sazonov, S. Yu.; Lutovinov, A. A.

Much of the progress in understanding γ-ray bursts (GRBs) has come from studies of distant events (redshift z ~ 1). In the brightest GRBs, the γ-rays are so highly collimated that the events can be seen across the Universe. It has long been suspected that the nearest and most common events have been missed because they are not as collimated or the…

Compact sources as the origin of the soft γ-ray emission of the Milky Way

Strong, A. W.; Walter, R.; Ubertini, P. +16 more

The Milky Way is known to be an abundant source of γ-ray photons, now determined to be mainly diffuse in nature and resulting from interstellar processes. In the soft γ-ray domain, point sources are expected to dominate, but the lack of sensitive high-resolution observations did not allow for a clear estimate of the contribution from such sources.…