Polarization Calibration of the Solar Optical Telescope onboard Hinode
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Abstract
The Solar Optical Telescope (SOT) onboard Hinode aims to obtain vector magnetic fields on the Sun through precise spectropolarimetry of solar spectral lines with a spatial resolution of 0.2 – 0.3 arcsec. A photometric accuracy of 10−3 is achieved and, after the polarization calibration, any artificial polarization from crosstalk among Stokes parameters is required to be suppressed below the level of the statistical noise over the SOT’s field of view. This goal was achieved by the highly optimized design of the SOT as a polarimeter, extensive analyses and testing of optical elements, and an end-to-end calibration test of the entire system. In this paper we review both the approach adopted to realize the high-precision polarimeter of the SOT and its final polarization characteristics.
Keywords
Polarimeter Stokes vector Space telescope Magnetic field Optical telescope SunPreview
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References
- Elmore, D.F.: 1990, A polarization calibration technique for the advanced stokes polarimeter. NCAR Technical Note NCAR/TN-355+STR, NCAR, Boulder, Colorado. Google Scholar
- Guimond, S., Elmore, D.: 2004, OE Mag. 4(5), 26. Google Scholar
- Ichimoto, K., Tsuneta, S., Suematsu, Y., Shimizu, T., Otsubo, M., Kato, Y., et al.: 2004, In: Mather, J.C. (ed.) Optical, Infrared, and Millimeter Space Telescopes, Proc. SPIE 5487, 1142. Google Scholar
- Ichimoto, K., the Solar-B Team: 2005, J. Korean Astron. Soc. 38, 307. ADSGoogle Scholar
- Ichimoto, K., Shinoda, K., Yamamoto, T., Kiyohara, J.: 2006, Publ. Natl. Astron. Obs. Japan 8, 11. ADSGoogle Scholar
- Kosugi, T., Matsuzaki, K., Sakao, T., Shimizu, T., Sone, Y., Tachikawa, S., et al.: 2007, Solar Phys. 243, 3. CrossRefADSGoogle Scholar
- Shimizu, T.: 2004, In: Sakurai, T., Sekii, T. (eds.) The Solar-B Mission and the Forefront of Solar Physics CS-325, Astron. Soc. Pac., San Francisco, 3. Google Scholar
- Shimizu, T., Nagata, S., Edwards, C., Tarbell, T., Kashiwagi, Y., Kodeki, K., et al.: 2004, In: Mather, J.C. (ed.) Optical, Infrared, and Millimeter Space Telescopes, Proc. SPIE 5487, 1199. Google Scholar
- Shimizu, T., Nagata, S., Tsuneta, S., Tarbell, T., Edwards, C., Shine, R., et al.: 2008, Solar Phys. in press. Google Scholar
- Skumanich, A., Lites, B.W.: 1997, Astrophys. J. Suppl. 110, 357. CrossRefADSGoogle Scholar
- Suematsu, Y., Tsuneta, S., Ichimoto, K., Shimizu, T., Otsubo, M., Katsukawa, Y., et al.: 2008, Solar Phys. in press. Google Scholar
- Tarbell, T.D., et al.: 2008, Solar Phys. to be submitted. Google Scholar
- Tsuneta, S., Ichimoto, K., Katsukawa, Y., Shimizu, T., Otsubo, M., Nagata, S., et al.: 2008, Solar Phys. in press. Google Scholar