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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 34, Iss. 22 — Aug. 1, 1995
  • pp: 4848–4856

Characterization of the Advanced Satellite for Cosmology and Astrophysics x-ray telescope: preflight calibration and ray tracing

Yoshiyuki Tsusaka, Hisanori Suzuki, Koujun Yamashita, Hideyo Kunieda, Yuzuru Tawara, Yasushi Ogasaka, Yasuhiro Uchibori, Hirohiko Honda, Masayuki Itoh, Hisamitsu Awaki, Hiroshi Tsunemi, Kiyoshi Hayashida, Susumu Nomoto, Mikio Wada, Emi Miyata, Peter J. Serlemitsos, Lalit Jalota, and Yang Soong  »View Author Affiliations


Applied Optics, Vol. 34, Issue 22, pp. 4848-4856 (1995)
http://dx.doi.org/10.1364/AO.34.004848


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Abstract

The x-ray properties of multinested thin-foil mirror x-ray telescopes (XRT’s) on board ASCA, the Advanced Satellite for Cosmology and Astrophysics, were fully evaluated with an x-ray pencil beam.Scanning over the telescope aperture of 35 cm in diameter with an x-ray pencil beam, we found the effective area of a set of XRT’s to be 325, 200, and 113 cm2 at energies of 1.5, 4.5, and 8.0 keV, respectively. We derive the point-spread functions (PSF’s) of the XRT’s by measuring the image profile at the focal plane with an x-ray CCD. The PSF is found to exhibit a sharp core concentrated within 30 arcsec and a broad wing extended to 3 arcmin in half-power diameter. We also evaluate the contribution of stray light, which is caused by the single reflection of x rays by primary or secondary mirrors and by the backside reflection of the mirrors. To obtain the characteristics of the XRT in the energy region of 0.5–10.0 keV, incorporated with the measurements at discrete energies, we develop a ray-tracing method with the telescope design parameter, the PSF, and optical constants. In particular, we obtain the optical constants around the gold-atom M shell (Au–M) absorption-edge energies by measuring the reflectivity of our mirror sample, with monochromatized x-rays in the energy range of 2.0–3.5 keV from synchrotron radiation. Taking into account the PSF’s and optical constants, we find that our ray-tracing program can reproduce all these XRT performances.

© 1995 Optical Society of America

History
Original Manuscript: June 23, 1994
Revised Manuscript: December 6, 1994
Published: August 1, 1995

Citation
Yoshiyuki Tsusaka, Hisanori Suzuki, Koujun Yamashita, Hideyo Kunieda, Yuzuru Tawara, Yasushi Ogasaka, Yasuhiro Uchibori, Hirohiko Honda, Masayuki Itoh, Hisamitsu Awaki, Hiroshi Tsunemi, Kiyoshi Hayashida, Susumu Nomoto, Mikio Wada, Emi Miyata, Peter J. Serlemitsos, Lalit Jalota, and Yang Soong, "Characterization of the Advanced Satellite for Cosmology and Astrophysics x-ray telescope: preflight calibration and ray tracing," Appl. Opt. 34, 4848-4856 (1995)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-34-22-4848


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References

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