DIOS: The diffuse intergalactic oxygen surveyor

T. Ohashi, M. Ishida, S. Sasaki, Y. Ishisaki, K. Mitsuda, N. Y. Yamasaki, R. Fujimoto, Y. Takei, Y. Tawara, A. Furuzawa, Y. Suto, Y. Yoshikawa, H. Kawayara, N. Kawai, T. G. Tsuru, K. Matsushita, T. Kitayama

Research output: Chapter in Book/Report/Conference proceedingConference contribution

31 Citations (Scopus)


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.

Original languageEnglish
Title of host publicationSpace Telescopes and Instrumentation II
Subtitle of host publicationUltraviolet to Gamma Ray
Publication statusPublished - 2006
Externally publishedYes
EventSpace Telescopes and Instrumentation II: Ultraviolet to Gamma Ray - Orlando, FL, United States
Duration: 24-05-200631-05-2006

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6266 I
ISSN (Print)0277-786X


OtherSpace Telescopes and Instrumentation II: Ultraviolet to Gamma Ray
Country/TerritoryUnited States
CityOrlando, FL

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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