Low Energy X-Ray Transmission Grating Spectrometer For AXAF

The proposed grating spectrometer for the Advanced X-Ray Astrophysics Facility (AXAF) covers the wavelength region between 2 and 140 Å. The wavelength resolution Δλ = 0.05 Å. The effective sensitive area as a function of wavelength is discussed. To illustrate the expected performance of the spectrometer some simulated spectra of a few interesting astrophysical objects are presented.