In Orbit Performance of the MAXI/SSC 1

Details In Orbit Performance of the MAXI/SSC 1 In Orbit Performance of the MAXI/SSC 1

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010fym..confp..61d&link_type=abstract

"The First Year of MAXI: Monitoring Variable X-ray Sources", Poster Presentations, 4th International MAXI Workshop held November

Physics

Scientific paper

Solid-state Slit Camera (SSC) is an X-ray CCD camera onboard the MAXI mission of the International Space Station (ISS). Its observation energy range is 0.5-12 keV, and the field of view (FOV) is 1.5 degree (FWHM) W 90 degree. Two sets of SSC sensors scan the sky as the rotation of the ISS. The CCD of SSC is normally cooled down to around -60 degree C. Sometimes the temperature of a certain CCD becomes higher than -52 degree C. We find that the thermal noise of CCD explodes at this condition. Furthermore, we notice an edge glow of each CCD probably due to the IR of Sun light. In case of the edge glow at the daytime, the background become continuously high and prevent us from observing the sky. The moon light generates high background region forming a diamond shape. There is also unknown Al-K background line which sometimes appears in the background spectrum. The presence of Al-K line can be judged using the count ratio 1.3-2.1 keV to 2.1-3.7 keV. In this poster, we will report the details of the background and the way of background screening of the SSC.

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