X-Shooter CCD Detector System: Calibrated Readout Modes Available at the Telescope

UVB Arm Detector

CCD Device: e2v CCD 44-82 (2k x 4k) "Pisces Australis II"
CCD carrier temperature: 153 K (acoustic alarms set at 143 K and 163 K)
CCD operating temperature: 158 K (estimated)
CFC cold plate temperature: 103 K

Readout mode 100_hg_1x1_1pt 100_hg_1x2_1pt 100_hg_2x2_1pt 400_lg_1x1_1pt 400_lg_1x2_1pt 400_lg_2x2_1pt 400_lg_AFC_1pt
Port used left left left left left left left
Conversion factor [e-/ADU] 0.62 0.62 0.62 1.75 1.75 1.75 1.75
Readout noise [e-] 2.5 2.5 2.5 4.5 4.5 4.5 4.5
Dark current [e-/pix/h]
(system up and dark > 24 h)		 < 0.4 < 0.4 < 0.4 < 0.3 < 0.3 < 0.3 < 0.3
Nominal Bias level [ADU] 1000 1000 1000 1000 1000 1000 1000
Linearity [%]
(peak-to-peak)		 0.4 0.4 0.4 1.0 1.0 1.0 1.0
Cosmic ray hit rate [hits/cm²/h]
(events > 30 e-)		 84a)
132b)		 - - - - - -
CTE (X) - - - 0.9999997
At 100ke		 - - -
CTE (Y) - - - 0.9999995
At 100ke		 - - -

a) ODT testbench measurement        b) Paranal measurement

VIS Arm Detector

CCD Device: MIT/LL CCID-20 (2k x 4k) "Catherine"
CCD carrier temperature: 135 K (acoustic alarms set at 133 K and 140 K)
CCD operating temperature: 158 K (estimated)
CFC cold plate temperature: 88 K

Readout mode 100_hg_1x1_1pt 100_hg_1x2_1pt 100_hg_2x2_1pt 400_lg_1x1_1pt 400_lg_1x2_1pt 400_lg_2x2_1pt 400_lg_AFC_1pt
Port used a a a a a a a
Conversion factor [e-/ADU] 0.6 0.6 0.6 1.4 1.4 1.4 1.4
Readout noise [e-] 3.1 3.1 3.1 5.2 5.2 5.2 5.2
Dark current [e-/pix/h]
(system up and dark > 24 h)		 < 0.7 < 0.7 < 0.7 < 0.3 < 0.3 < 0.3 -
Nominal Bias level [ADU] 1000 1000 1000 1000 1000 1000 1000
Linearity [%]
(peak-to-peak)		 0.8 0.8 0.8 0.8 0.8 0.8 0.8
Cosmic ray hit rate [hits/cm²/h]
(events > 30 e-)		 114a)
198b)		 - - - - - -
CTE (X) - - - 0.999997
At 80ke		 - - -
CTE (Y) - - - 0.9999998
At 80ke		 - - -

a) ODT testbench measurement        b) Paranal measurement

Back to X-Shooter CCD Detector System - overview page