FOCAS instrument parameters

In June 2010, the CCDs have been replaced with fully-depleted type CCDs by Hamamatsu Photonics K.K.

Check this page for more information.

Detectors 2 2K x 4K 4-side buttable CCDs (Hamamatsu)
Pixel size 15 um
Pixel scale 0.1038''
Field of view 6' (circular)
Gain 1.9 - 2.1 e-/ADU
Dark current < 0.1 e-/s
Read noise 4 e- rms
Saturation level 40 000 e-
Readout time 24 s (whole CCD area, no binning)
Min. exposure time 0.5 s (3%) or 1.0 s (1%)


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