FLAMINGOS I Detector |
The current array installed in FLAMINGOS-I is an Engineering Grade Rockwell PACE HgCdTe. The Science-Grade Hawaii II array is expected to arrive soon, but its use in 2002A is not guaranteed.
Because broad-band imaging observations are background limited in short exposure times , the readout mode corresponds to a single Fowler (double-correlated sampling) pair. For spectroscopic observations (with low background), 16 sample pairs are used to reduce the read noise by a factor of 4. Two bias voltage settings are used in these cases to provide deeper wells for the high background mode.
Array | HgCdTe (Rockwell PACE) |
Pixel format | 2048x2048 18.5-micron pixels |
Spectral Response | 1 to 2.5 microns |
Dark Current (imaging) | 6.3 e-/s/pix |
Dark Current (spectroscopy) | 0.3 e-/s/pix |
Read Noise (imaging) | 49.5 e-/pix |
Read Noise (spectroscopy) | 15 e-/pix |
Gain | 4.5 e-/ADU |
Well depth (imaging) | 225,000 e- |
Well depth (spectroscopy) | 171,000 e- |
Last update Aug 30, 2001; Michael Ledlow