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