The Hinode X-Ray Telescope (XRT): Camera Design, Performance and Operations |
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| Authors: | R Kano T Sakao H Hara S Tsuneta K Matsuzaki K Kumagai M Shimojo K Minesugi K Shibasaki E E DeLuca L Golub J Bookbinder D Caldwell P Cheimets J Cirtain E Dennis T Kent M Weber |
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| Affiliation: | (1) National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan;(2) Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229-8510, Japan;(3) Nobeyama Solar Radio Observatory, National Astronomical Observatory of Japan, Nobeyama, Nagano 384-1305, Japan;(4) Smithsonian Astrophysical Observatory, 60 Garden Street, Cambridge, MA 02138, USA |
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| Abstract: | The X-ray Telescope (XRT) aboard the Hinode satellite is a grazing incidence X-ray imager equipped with a 2048×2048 CCD. The XRT has 1 arcsec pixels with a wide field
of view of 34×34 arcmin. It is sensitive to plasmas with a wide temperature range from < 1 to 30 MK, allowing us to obtain
TRACE-like low-temperature images as well as Yohkoh/SXT-like high-temperature images. The spacecraft Mission Data Processor (MDP) controls the XRT through sequence tables with
versatile autonomous functions such as exposure control, region-of-interest tracking, flare detection, and flare location
identification. Data are compressed either with DPCM or JPEG, depending on the purpose. This results in higher cadence and/or
wider field of view for a given telemetry bandwidth. With a focus adjust mechanism, a higher resolution of Gaussian focus
may be available on-axis. This paper follows the first instrument paper for the XRT (Golub et al., Solar Phys.
243, 63, 2007) and discusses the design and measured performance of the X-ray CCD camera for the XRT and its control system with the MDP. |
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| Keywords: | Sun: corona Sun: X-rays |
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