Disclosing the gamma-ray burst circumburst ambient with XMM-Newton

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White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, Grb Too-1

Scientific paper

Long GRBs signal the death of massive stars. The afterglow emission can be used to probe the progenitor ambient through a detailed study of the absorption pattern. This has been done at optical wavelengths with impressive results. We propose here to carry out similar studies in the X-ray band with high resolution spectroscopy. Taking advantage of Swift observations, we propose to trigger TOOs on selected bright GRBs within 1 d from their explosions. These data will allow us to have access to an unprecedented statistics. Detailed studies of the absorption pattern imprinted in the X-ray spectrum by the circumburst material as well as the host galaxy ISM can be carried out, allowing us to shed light on the material metallicity, composition and distance.

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