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18 August 2005 The in-flight spectroscopic performance of the Swift XRT CCD camera
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The Swift X-ray Telescope (XRT) focal plane camera is a front-illuminated MOS CCD, providing a spectral response kernel of 144 eV FWHM at 6.5 keV. We describe the CCD calibration program based on celestial and on-board calibration sources, relevant in-flight experiences, and developments in the CCD response model. We illustrate how the revised response model describes the calibration sources well. Loss of temperature control motivated a laboratory program to re-optimize the CCD substrate voltage, we describe the small changes in the CCD response that would result from use of a substrate voltage of 6V.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Julian P. Osborne, A. P. Beardmore, O. Godet, A. F. Abbey, M. R. Goad, K. L. Page, A. A. Wells, L. Angelini, D. N. Burrows, S. Campana, G. Chincarini, O. Citterio, G. Cusumano, P. Giommi, J. E. Hill, J. Kennea, V. LaParola, V. Mangano, T. Mineo, A. Moretti, J. A. Nousek, C. Pagani, M. Perri, P. Romano, G. Tagliaferri, and F. Tamburelli "The in-flight spectroscopic performance of the Swift XRT CCD camera", Proc. SPIE 5898, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XIV, 589817 (18 August 2005);

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