HINODE Instruments - X-ray Telescope (XRT)

XRT has 2arcsec resolution that is three times as high as Yohkoh. XRT consists of the X-ray and visible light optics, focal plane mechanisms (filters and shutter), and the 2k x 2k CCD camera. The Mission Data Processor (MDP) also plays a vital role for XRT.

  • Temperature range: 6.1 < log T < 7.5
  • Temperature discrimination: log T=0.2
  • Angular resolution: 2arcsec
  • Temporal resolution: cadence=2s (reduced FOV), exposure time: min=4ms, max=10s
  • FOV: Full disk (>30 arc min)

XRT has an entrance pre-filter and ten focal-plane filters. The focal-plane filters consist of nine X-ray filters and one filter for visible-light observation (G-band). These filters are summarized below table.

Type Name Metal Substrate Hinode Deta Center EC_FW1 EC_FW2 EC_VL
Material Thickness Material Thickness
/ Trans.
"Wavelength" at Search Condition "Filter" at Search Result
Pre-Filter Al/Poly Al 1200 Å Polyimide 2500 Å (Not listied) - - -
Focal-plane Filters Thin Al/Mesh Al 1600 Å Mesh 82 % Thin Al Mesh Thin_Al_mesh 0 1 0
Thin Al/Poly Al 1600 Å Polyimide 2500 Å Thin Al poly Thin_Al_poly 1 0 0
Thin Be Be 9 µm - 100 % Thin Be Thin Be 3 0 0
Med Be Be 30 µm - 100 % Medium Be Medium_Be 4 0 0
Thick Be Be 300 µm - 100 % Thick Be Thick_Be 0 5 0
Thick Al Al 25 µm - 100 % Thick Al Thick_Al 0 4 0
Med Al Al 12.5 µm - 100 % Medium Al Medium_Al 5 0 0
Ti/Poly Ti 3000 Å Polyimide 2500 Å Ti poly Ti_poly 0 2 0
C/Poly C 7000 Å Polyimide 2500 Å C poly C_poly 2 0 0
White Light SiO2 2.5 mm - - Gband G-Band 0 3 1

The values in the "EC_FW1", "EC_FW2" and "EC_VL" columns of the table represent the values of the EC_FW1, EC_FW2 and EC_VL keywords in the FITS header. EC_FW1 and EC_FW2 are position numbers at the filter wheel 1 and the filter wheel 2, respectively. EC_VL=0 means VLS(visible light shutter) is closed and EC_VI=1 means VLS is open.

For more details on XRT, check the following links:

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Mission Wide

  • The Hinode (Solar-B) Mission: An Overview
    Kosugi, T., Matsuzaki, K., Sakao, T., Shimizu, T., Sone, Y., Tachikawa, S., Hashimoto, T., Minesugi, K., Ohnishi, A., Yamada, T., Tsuneta, S., Hara, H., Ichimoto, K., Suematsu, Y., Shimojo, M., Watanabe, T., Davis, J.M., Hill, L.D., Owens, J.K., Title, A.M., Culhane, J.L., Harra, L., Doschek, G.A., and Golub, L.
    2007, Solar Physics, 243, pp. 3-17


  • The X-Ray Telescope (XRT) for the Hinode Mission
    Golub, L., DeLuca, E., Austin, G., Bookbinder, J., Caldwell, D., Cheimets, P., Cirtain,J., Cosmo, M., Reid, P., Sette, A., Weber, M., Sakao, T., Kano, R., Shibasaki, K., Hara, H., Tsuneta, S., Kumagai, K., Tamura, T., Shimojo, M., McCracken, J., Carpenter, J., Haight, H., Siler, R., Wright, E., Tucker, J., Rutledge, H., Barbera, M., Peres, G., and Varisco,S.
    2007, Solar Physics, 243 pp. 63-86
  • The Hinode X-Ray Telescope (XRT): Camera Design, Perforance and Operations
    Kano, R., Sakao, T., Hara, H., Tsuneta, S., Matsuzaki, K., Kumagai, K., Shimojo, M., Minesugi, K., Shibasaki, K., DeLuca, E. E., Golub, L., Bookbinder,J., Caldwell, D., Cheimets, P., Cirtain, J., Dennis, E., Kent, T., and Weber, M.
    2008, Solar Physics, 249 pp.263-279
  • Coronal-Temperature-Diagnostic Capability of the Hinode/X-Ray Telescope Based on Self-Consistent Calibration
    Narukage, N., Sakao, T., Kano, R., Hara, H., Shimojo, M., Bando, T., Urayama, F., Deluca, E. E., Golub, L., Weber, M., Grigis, P., Cirtain, J., and Tsuneta, S.
    2011, Solar Physics, 269 pp.169-236

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Last Modified: 04 July 2022