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CCD7 (ALFOSC), details:

Summary:

Provenance Loral/Lesser
Horizontal pixels 2048
Vertical pixels 2048
Pixel size1 & plate scale 15µ, 0.188"/pixel
Readout noise approx 6 e-/pixel
Conversion factor approx 1 e-/ADU
Nonlinearity better than 0.1%
Readout time TBM
MTF2 2.24 pixels @ 543 nm
QE: 350, 400, 500, 600, 700, 800 nm60, 88, 95, 90, 80, 50 %
CTI (H, V) 1×10-6, 5×10-6
Cosmetic quality 8 bad columns, 10 traps, many dark "speckles"
Full well 90,000 electrons

Notes & Legend:

NOTE: Recent measurements show that there is some structures in the dark-current. The variations are at a level of 3 e-/pix/1000s

1: Pixels have very slightly different dimensions in the horizontal and vertical directions.
2: Strehl equivalent width (Sørensen, A. N., 1998, CUO report).
TBM = To Be Measured



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