Translator Disclaimer
13 September 2007 The in-flight spectroscopic performance of the Swift XRT CCD camera during 2006-2007
Author Affiliations +
The Swift X-ray Telescope focal plane camera is a front-illuminated MOS CCD, providing a spectral response kernel of 135 eV FWHM at 5.9 keV as measured before launch. 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. Comparison of observed spectra with models folded through the instrument response produces negative residuals around and below the Oxygen edge. We discuss several possible causes for such residuals. Traps created by proton damage on the CCD increase the charge transfer inefficiency (CTI) over time. We describe the evolution of the CTI since the launch and its effect on the CCD spectral resolution and the gain.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
O. Godet, A. P. Beardmore, A. F. Abbey, J. P. Osborne, K. L. Page, L. Tyler, D. N. Burrows, P. Evans, R. Starling, A. A. Wells, L. Angelini, S. Campana, G. Chincarini, O. Citterio, G. Cusamano, P. Giommi, J. E. Hill, J. Kennea, V. LaParola, V. Mangano, T. Mineo, A. Moretti, J. A. Nousek, C. Pagani, M. Perri, M. Capalbi, P. Romano, G. Tagliaferri, and F. Tamburelli "The in-flight spectroscopic performance of the Swift XRT CCD camera during 2006-2007", Proc. SPIE 6686, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XV, 66860A (13 September 2007);


Measuring system of fiber position of LAMOST
Proceedings of SPIE (September 29 2004)
Soft x ray response of the prototype CCD camera (XIS)...
Proceedings of SPIE (November 10 1998)
X-ray imaging spectrometer (XIS) on board Astro-E2
Proceedings of SPIE (March 11 2003)
EPIC pn CCD camera onboard XMM Newton an update...
Proceedings of SPIE (August 18 2005)
Low-noise charge injection in the CCD22
Proceedings of SPIE (September 29 2004)

Back to Top