T. Okajima, J. Tueller, H. A. Krimm, S. D. Barthelmy, S. M. Owens, P. J. Serlemitsos, Y. Soong, K.-W. Chan (NASA Goddard Space Flight Center), Y. Ogasaka, R. Shibata, K. Tamura, A. Furuzawa, R. Takahashi, T. Miyazawa, M. Sakashita, K. Shimoda (Nagoya University)
InFOC\muS is a new generation balloon-borne hard X-ray telescope with focusing optics and spectroscopy. We had a successful 22.5 hour flight from Fort Sumner, NM on September 16-17, 2004. In this paper, we present the performance of the hard X-ray telescope, which consists of a depth-graded platinum-carbon multilayer mirror (called a supermirror) and a CdZnTe detector. Supermirrors are coated on thin aluminum substrates (150\mum) as reflectors. The mirror is similar to the Astro-E/E2 XRT grazing incidence optics, but with a longer focal length of 8 m. It has an effective area of 49 cm2 at 30 keV, an angular resolution of 2.6 arcmin (HPD), and a field of view of 10 arcmin. The CdZnTe detector is a pixellated solid-state device capable of imaging spectroscopy. The CdZnTe detector is configured with a 12\times12 segmented array of detector pixels. The pixels are 2 mm square, and are placed on 2.1 mm centers. An averaged energy resolution is 4.4 keV at 60 keV and its standard deviation is 0.36 keV over 128 pixels. The detector is surrounded by a 3-cm thick CsI anti coincidence shield to reduce background from particles and photons not incident along the mirror focal direction. Detailed performance based on ground calibration results are presented.
Bulletin of the American Astronomical Society, 36 5
© 2004. The American Astronomical Society.