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Toshifumi Shimizu, Yukio Katsukawa, Keiichi Matsuzaki, Kiyoshi Ichimoto, Ryohei Kano, Edward E. DeLuca, Loraine L. Lundquist, Mark Weber, Theodore D. Tarbell, Richard A. Shine, Mitsuru Sôma, Saku Tsuneta, Taro Sakao, Kenji Minesugi, Hinode Calibration for Precise Image Co-Alignment between SOT and XRT (2006 November–2007 April), Publications of the Astronomical Society of Japan, Volume 59, Issue sp3, 30 November 2007, Pages S845–S852, https://doi.org/10.1093/pasj/59.sp3.S845
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To understand the physical mechanisms for activity and heating in the solar atmosphere, the magnetic coupling from the photosphere to the corona is an important piece of information from the Hinode observations, and therefore precise positional alignment is required among the data acquired by different telescopes. The Hinode spacecraft and its onboard telescopes were developed to allow us to investigate magnetic coupling with co-alignment accuracy better than 1|$^{\prime\prime}$|. Using the Mercury transit observed on 2006 November 8 and co-alignment measurements regularly performed on a weekly basis, we have determined the information necessary for precise image co-alignment, and have confirmed that co-alignment better than 1|$^{\prime\prime}$| can be realized between Solar Optical Telescope (SOT) and X-Ray Telescope (XRT) with our baseline co-alignment method. This paper presents results from the calibration for precise co-alignment of CCD images from SOT and XRT.
