Calibration of flight model CCDs for CoRoT mission

Details Calibration of flight model CCDs for CoRoT mission Calibration of flight model CCDs for CoRoT mission

Feb 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006mnras.365.1171l&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 365, Issue 4, pp. 1171-1179.

Astronomy and Astrophysics

Astronomy

1

Instrumentation: Detectors, Space Vehicles: Instruments, Techniques: Photometric

Scientific paper

CoRoT (Convection, Rotation and Transit) is a mission of high-accuracy photometry with two scientific programmes: asteroseismology and planet finding, using CCDs as detectors. Ten 2048×4096 CCDs manufactured by E2V (42-80) were calibrated on Meudon test bench in order to choose the best ones for flight. A very high instrument stability is needed. Taking into account the environmental perturbations (temperature, attitude control system jitter, radiations, etc.) we studied sensitivity of CCD gain and quantum efficiency to temperature and sensitivity of the output signal to bias voltages. Special attention was paid to pixel capacity and noise sources coming from dark current and pixel response non-uniformity. The calibration results together with the expected voltages and temperature fluctuations are compared with the specifications.

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