  The X-Ray Telescope (XRT) onboard the Hinode satellite is an X-ray imager
that observes the solar corona with the capability of diagnosing coronal
temperatures from less than 1 MK to more than 10 MK. To make full use of this
capability, Narukage et al. (Solar Phys. 269, 169, 2011) determined the
thickness of each of the X-ray focal-plane analysis filters based on
calibration measurements from the ground-based end-to-end test. However, in
their paper, the calibration of the thicker filters for observations of active
regions and flares, namely the med-Be, med-Al, thick-Al and thick-Be filters,
was insufficient due to the insufficient X-ray flux used in the measurements.
In this work, we recalibrate those thicker filters using quiescent active
region data taken with multiple filters of XRT. On the basis of our updated
calibration results, we present the revised coronal-temperature-diagnostic
capability of XRT.
