The in-flight spectroscopic performance of the Swift XRT CCD camera

J. 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. MorettiJ. A. Nousek, C. Pagani, M. Perri, P. Romano, G. Tagliaferri, F. Tamburelli

Research output: Contribution to journalConference articlepeer-review

7 Scopus citations


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.

Original languageEnglish (US)
Article number589817
Pages (from-to)1-8
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 2005
EventUV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XIV - San Diego, CA, United States
Duration: Aug 1 2005Aug 3 2005

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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