Monitor of All-sky X-ray Image (MAXI)

Details Monitor of All-sky X-ray Image (MAXI) Monitor of All-sky X-ray Image (MAXI)

Jan 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aipc..504..181m&link_type=abstract

SPACE TECHNOLOGY AND APPLICATIONS INTERNATIONAL FORUM - 2000. AIP Conference Proceedings, Volume 504, pp. 181-186 (2000).

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Applications

X- And Gamma-Ray Telescopes And Instrumentation, X-Ray Sources, X-Ray Bursts

Scientific paper

Monitor of All-sky X-ray Image (MAXI) is the first astrophysical payload which will be mounted on the Japanese Experiment Module (JEM) Exposed Facility in 2004. It is an X-ray all-sky monitor with unprecedented sensitivity to watch the activities of the X-ray sources in the whole sky in every 90 minutes. MAXI is boxshaped in 0.8×1.2×1.85 m with the weight of 500 kg. The mission life will be at least 2 years. MAXI has two fan-like field of views (FOV), 106×1.5 degree each. The X-ray instruments are Gas Slit Camera (GSC) and Solid-state Slit Camera (SSC). The GSC uses gas one-dimensional position sensitive proportional counters with 5340 cm2 effective area in total and the SSC uses CCDs with 200 cm2. Both are capable to detect one-dimensional image which is used to obtain the locations of the X-ray sources in the FOV along the long direction. Together with the scan which determine the other direction, MAXI can scan almost all sky with a precision of better than 1 degree in the energy range of 0.5-30 keV. The CCD is electrically cooled to -60 °C and the camera body is radiatively cooled to -20 °C. The CCD chip itself and the radiators may suffer contamination problem. The continuous Ethernet down link will enable us to alert the astronomers in all over the world to the appearance of X-ray transients, novae, bursts, flares etc. We made a test counter and test chips in 1998. Those are being tested in RIKEN, NASDA and Osaka-university. In this paper the test results will be presented, as well as the general description of the MAXI mission. .

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