The X-ray telescope onboard Suzaku

Peter J. Serlemitsos, Yang Soong, Kai Wing Chan, Takashi Okajima, John P. Lehan, Yoshitomo Maeda, Kei Itoh, Hideyuki Mori, Ryo Iizuka, Akiharu Itoh, Hirohiko Indue, Shunsaku Okada, Yushi Yokoyama, Yumi Itoh, Masatoshi Ebara, Ryoko Nakamura, Kensuke Suzuki, Manabu Ishida, Akira Hayakawa, Chiaki InoueSatoshi Okuma, Ren Kubota, Masaki Suzuki, Takeyuki Osawa, Koujun Yamashita, Hideyo Kunieda, Yuzuru Tawara, Yasushi Ogasaka, Akihiro Furuzawa, Keisuke Tamura, Ryo Shibata, Yoshito Haba, Masataka Naitou, Kazutami Mlsakl

Research output: Contribution to journalArticlepeer-review

405 Citations (Scopus)


We present the design parameters, production process, and in-flight performance of the X-ray telescope (XRT) onboard Suzaku. The imaging capability is significantly improved over the ASCA XRT, which had half-power diameters of 3.′6, to 1.′'8-2.′3 for all four XRT-I modules. The optical axes are found to be distributed within a radius of 1.′3, which makes the observation efficiency of all the XRTs more than 97% at the XIS-default observing position. The vignetting over the XIS field of view predicted via ray-tracing coincides with that measured for observations of the Crab Nebula to within ∼ 10%. Contemporaneous fits of a power law to all of the XIS spectra of the Crab Nebula taken at the two standard observing positions (XIS/HXD-default positions) gives a flux consistent with that obtained by Toor and Seward (1974, AJ, 79, 995) to within ∼ 2%. The pre-collimator on the top of each XRT module successfully reduces the intensity of the stray light from the 20′ and 50′-off directions down to the level of pre-flight expectations.

Original languageEnglish
Pages (from-to)S9-S21
JournalPublications of the Astronomical Society of Japan
Issue number1 SPEC. ISS.
Publication statusPublished - 2007
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


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