An On-Orbit Determination of the On-Axis Point Spread Function of the Hinode X-Ray Telescope
Golub, Leon; Narukage, Noriyuki; Sakao, Taro; Shibasaki, Kiyoto; Weber, Mark; Kano, Ryouhei; Deluca, Edward E.; Cirtain, Jonathan
United States, Japan
Abstract
The Hinode X-ray Telescope provides unprecedented observations of the solar corona in X-rays, due in part to its fine resolution. The X-ray point spread function (PSF) was measured before launch at the NASA X-ray Calibration Facility to have a FWHM of 0.8''. This paper describes the work to verify the PSF measurements using on-orbit observations of planetary transits and solar eclipses. Analysis of a Mercury transit gives a PSF FWHM = 1.0" ± 0.12".