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
"Filter" |
FITS header (*) |
| Material |
Thickness |
Material |
Thickness
/ Trans. |
EC_FW1 |
EC_FW2 |
EC_VL |
| Pre-Filter |
Al/Poly |
Al |
1200 Å |
Polyimide |
2500 Å |
- |
- |
- |
- |
| Focal-plane Filters |
Thin Al/Mesh |
Al |
1600 Å |
Mesh |
82 % |
Thin_Al_mesh |
0 |
1 |
0 |
| Thin Al/Poly |
Al |
1600 Å |
Polyimide |
2500 Å |
Thin_Al_poly |
1 |
0 |
0 |
| Thin Be |
Be |
9 µm |
- |
100 % |
Thin Be |
3 |
0 |
0 |
| Med Be |
Be |
30 µm |
- |
100 % |
Medium_Be |
4 |
0 |
0 |
| Thick Be |
Be |
300 µm |
- |
100 % |
Thick_Be |
0 |
5 |
0 |
| Thick Al |
Al |
25 µm |
- |
100 % |
Thick_Al |
0 |
4 |
0 |
| Med Al |
Al |
12.5 µm |
- |
100 % |
Medium_Al |
5 |
0 |
0 |
| Ti/Poly |
Ti |
3000 Å |
Polyimide |
2500 Å |
Ti_poly |
0 |
2 |
0 |
| C/Poly |
C |
7000 Å |
Polyimide |
2500 Å |
C_poly |
2 |
0 |
0 |
| White Light |
SiO2 |
2.5 mm |
- |
- |
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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References
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
XRT
- 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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