CONICA's Characteristics
Since May 2004, CONICA the infrared camera and spectrometer attached to NAOS is equipped with an Aladdin3 array (InSb - 1024*1026 pixels).
Only the main characteristics of this camera are reported here. Please see the user manual for a full description.
| Detector | Format (pixels) | Pixel size (microns) | Dark current (e-/s/pixel) | Wavelength range (microns) | Quantum Efficiency |
|---|---|---|---|---|---|
| Aladdin 3 | 1026 x 1024 | 27 | 0.05 - 0..15 | 0.8 - 5.5 | 0.8-0.9 |
Images provided to the users are of 1024x1024 pixels, withthe exception of M' images, which are taken in windowed mode and have a512x514 pixels size format.
| Instrument mode | Readout mode | Detector mode | Readout noise (ADU) | Gain (e-/ADU) | Full Well (ADU) | Min DIT (Sec) |
|---|---|---|---|---|---|---|
| SW | FowlerNsamp | HighSensitivity | 1.3 | 12.1 | 9200 | 1.7927 |
| SW | Double_RdRstRd | HighDynamic | 4.2 | 11.0 | 15000 | 0.3454 |
| LW NB imaging | Uncorr | HighDynamic | 4.4 | 11.0 | 15000 | 0.1750 |
| LW L'imaging | Uncorr | HighWellDepth | 4.4 | 9.8 | 22000 | 0.1750 |
| LW M'imaging | Uncorr | HighBackground | 4.4 | 9.0 | 28000 | 0.1750 |
The array's behaviour can be considered as linear up to two third of the quoted full well depth.
Cube mode is a particular way to use the CONICA detector: instead of saving an average image, that is the sum of all the DITs divided by the NDIT, all DIT frames are saved in a cube. The last plane of the cube contains also the average frame. Follow the link above for more information on this mode.
| Camera | Scale (mas/pixel) | FOV (arcsec) | Spectral Range | Comments |
|---|---|---|---|---|
| S13 | 13.22 | 14x14 | 1.0-2.5 microns | |
| S27 | 27.06 | 28x28 | 1.0-2.5 microns | |
| S54 | 54.3 | 56x56 | 1.0-2.5 microns | |
| L27 | 27.12 | 28x28 | 2.5-5.0 microns | |
| L54 | 54.7 | 56x56 | 2.5-5.0 microns | NB_3.74 and NB_4.05 filters only |
| SDI+ | 17.25 | 8x8 | 1.6 microns | SDI+ and SDI+4 modes |