We present our proposal for a small X-ray mission DIOS (Diffuse Intergalactic Oxygen Surveyor), consisting of a 4-stage X-ray telescope and an array of TES microcalorimeters, cooled with mechanical coolers, with a total weight of about 400 kg. The mission will perform survey observations of warm-hot intergalactic medium using OVII and OVIII emission lines, with the energy coverage up to 1.5 keV. The wide field of view of about 50' diameter, superior energy resolution close to 2 eV FWHM, and very low background will together enable us a wide range of science for diffuse X-ray sources. We briefly describe the design of the satellite, performance of the subsystems and the expected results.
@article{arxiv.astro-ph/0607127,
title = {DIOS: the Diffuse Intergalactic Oxygen Surveyor},
author = {T. Ohashi and M. Ishida and S. Sasaki and Y. Ishisaki and K. Mitsuda and N. Y. Yamasaki and R. Fujimoto and Y. Takei and Y. Tawara and A. Furuzawa and Y. Suto and K. Yoshikawa and H. Kawahara and N. Kawai and T. G. Tsuru and K. Matsushita and T. Kitayama},
journal= {arXiv preprint arXiv:astro-ph/0607127},
year = {2009}
}
Comments
9 pages, 11 figures, a proceedings of SPIE "Astronomical Telescopes and Instrumentation" 2006