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Observations of supergiant fast X-ray transients with LOFT

Esposito, P.; Romano, P.; Ferrigno, C. +2 more

Supergiant fast X-ray transients are a subclass of high mass X-ray binaries displaying a peculiar and still poorly understood extreme variability in the X-ray domain. These sources undergo short sporadic outbursts (L∼ 10³⁶-10³⁷ erg s^-1), lasting few ks at the most, and spend a large fraction of their tim…

A view of supernova remnant CTB 37A with the Fermi Gamma-ray Space Telescope

Fermi-LAT Collaboration; Brandt, T. J.

Supernovae and their remnants have long been favored as cosmic ray accelerators. Recent data from the Fermi Gamma-ray Space Telescope has given us an improved window into such sources, including the remnant CTB 37A. Using the Fermi Large Area Telescope, we found significant gamma-ray emission coincident with the remnant, which also emits in radio,…