CIAO instrument parameters 

Detector ALADDIN II 10242 InSb array
Pixel size 27 um
Pixel scale 0.0115'' or 0.0213''
Field of view 11.8'' or 21.8'' square
Gain 7.5 e-/ADU
Dark current 6 e-/s (for 10s exposure; it depends on exposure time)
Read noise 60 e- rms
Saturation level 60000 e- (5% linearity) (*1)
Readout rate 0.33 s (normal), 0.18 s (minimum)
Occulting masks 0.1'', 0.2'', 0.3'', 0.4'', 0.5'', 0.6'', 0.8'', 1.0", 1.5'' 2.0", 3.0" and 4.0" diameter

Detector gain, dark current, read noise, and saturation level were measured at array temperature 29.0 K, with a bias voltage of 300 mV, and a 0.33 s readout rate.

(*1): The saturation level should be halved (4000ADU) for a bright object (i.e., bright enough for less than 5 s exposure), because each exposure needs additional time for non-destructive readout (maximum of 5 s).

Images of the CIAO detector's bad pixels are available. 



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