Abstract
We present coalignment calibration procedures for the X-ray Telescope (XRT) onboard the Hinode satellite. We performed not only an XRT stand-alone calibration, but also cross calibration using data from the Helioseismic and Magnetic Imager (HMI) and the Atmospheric Imaging Assembly (AIA) onboard the Solar Dynamics Observatory (SDO). Several new methods we describe here may also be useful for the coalignment calibration of other instruments. We have developed a database of coalignment coefficients and software to access it, so that all XRT images can be easily and accurately overlaid onto the images from other instruments, especially AIA and HMI.
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