X-shooter
User Manual
Doc:
Issue
Date
Page
VLT-MAN-ESO-12000-0115
1
01.03.2009
18 of 60
ESO, Karl-Schwarzschild-Str. 2, 85748 Garching bei München, Germany
UVB
VIS
NIR
Detector
type
E2V CCD44-82
MIT/LL CCID 20
substrate
removed Hawaii
2RG
Operating
temperature
153 K
135 K
81 K
QE
80% at 320 nm
88% at 400 nm
83% at 500 nm
81% at 540 nm
78% at 550 nm
91% at 700 nm
74% at 900 nm
23% at 1000 nm
85%
Number of
pixels
2048
×
3000
(2048
×
4102 used in
windowed readout)
2048
×
4096
2048
×
2048
(1024
×
2048
used)
Pixel size
15
µ
m
15
µ
m
18
µ
m
Gain
(e
-
/ADU)
High: 0.67
Low: 1.75
High: 0.64
Low: 1.5
2.12
Readout
noise
(e
-
rms)
Slow: 2.6
Fast: 4.5
Slow: 3.2
Fast: 5.3
Short DIT: 22
DIT=600s: 5.5
Saturation
(ADU)
65000 (TBC)
65000
45000 (TBC)
Full frame
readout time
(s)
1x1, slow-fast: 70-19
1x2, slow-fast: 38-12
2x2, slow-fast: 22-8
1x1, slow-fast: 92-24
1x2, slow-fast: 48-14
2x2, slow-fast: 27-9
0.88 (for single
readout, TBC)
Dark
current
level
<0.2e-/pix/h (TBC)
<1.1e-/pix/h (TBC)
14 e-/pix/h
(TBC)
Fringing
amplitude
-
~5% peak-to-valley
-
Non-lineariy
<0.7%
<0.8%
<1% up to
45000 ADUs
(TBC)
Readout
direction
Main disp. dir.
Main disp. dir.
-
Prescan and
overscan
areas
1x1 and 1x2: X=1-48
and 2097-2144
2x2: X=1-24 and 1049-
1072
1x1 and 1x2: pix 39-48
and 2097-2144
2x2: 19-24 and 1049-
1072
-
Flatness
<8
µ
m peak-to-valley
Table 6: measured properties of the X-shooter detectors
