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astro-ph2000★ 165 cited
Discovery of a Transient Absorption Edge in the X-ray Spectrum of GRB 990705
L. Amati, F. Frontera, M. Vietri +18
We report the discovery of a transient equivalent hydrogen column density with an absorption edge at ~3.8 kiloelectron volts in the spectrum of the prompt x-ray emission of gamma-r…
astro-ph2000★ 2 cited
ASCA and BeppoSAX observations of the peculiar X-ray source 4U1700+24/HD154791
D. Dal Fiume, N. Masetti, C. Bartolini +9
The X-ray source 4U1700+24/HD154791 is one of the few galactic sources whose counterpart is an evolved M star. In X-rays the source shows extreme erratic variability and a complex…