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

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

2005-10-17

arxiv.org/abs/astro-ph/0510489v1

AIP Conf.Proc.836:708-711,2006

Astronomy and Astrophysics

Astrophysics

8 pages, including 7 figures. Submitted to proceedings of SPIE 5898, UV, X-Ray and Gamma-Ray Space Instrumentation for Astrono

Scientific paper

10.1063/1.2207983

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.

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