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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. |