Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006spie.6266e..99t&link_type=abstract
Space Telescopes and Instrumentation II: Ultraviolet to Gamma Ray. Edited by Turner, Martin J. L.; Hasinger, Günther. Proceedi
Astronomy and Astrophysics
Astronomy
Scientific paper
Detailed measurements of reflectivity of gold, which is used for X-ray mirror for X-ray telescope onboard "Suzaku" satellite was performed in the synchrotron radiation facility SPring-8 BL15XU. We measured reflectivity of the mirror, which uses total reflection of gold thin layer. Grazing incidence angle is 0.5 degree and incident X-ray monochromatized in the energy range from 2.2 keV to 3.5 keV, where M-edge structure of gold appears. We used double crystal monochrometer using Si(111) crystal, (ΔE/E ~ 10-4) to monochromatize the incident X-ray. Energy calibration was performed using L-edge of molybdenum (2530.2 eV) and K-edge of argon (3205.9 eV). From the results, that the energy of M-V and M-IV edge of gold is different from optical constant table, and almost same as the value reported by Graessle et al.(1992).1 It is important to study the optical constants of gold or other mirror material for X-ray astronomy. This results will be feed back to the response function of the X-ray telescope of Suzaku satellite. It is very important for X-ray spectroscopy in X-ray astronomy.
Ebara Masatoshi
Iizuka Ryo
Itoh Akiharu
Maeda Yoshitomo
Naitou Masataka
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