Instrument's Characteristics
In this page are listed the main characteristics of the imaging mode
and the filters of the instrument.
This is intented as a quick
reference. A detailled description of HAWK-I can be found in the user's manual
Imaging mode: characteristics and sensitivity
The detectors
HAWK-I Detectors definition
|
Characteristics of the four detectors
| Detector Parameter |
|
Q1 |
Q2 |
Q3 |
Q4 |
| Detector numbering |
|
#66 |
#78 |
#79 |
#88 |
| Gain [e-/ADU] |
|
1.705 |
1.870 |
1.735 |
2.110 |
| Operating temperature |
|
75K, controlled to 1mK |
| Dark current [e-/s] (at 75K) |
|
between 0.10 & 0.15 |
| Read noise* (DCR) |
|
~ 12 e- |
| Read noise* (NDR) |
|
~ 5 e- |
| Linear range (1%) |
|
60.000e- (~30.000 ADUs) |
| Saturation level |
|
between 40.000 & 50.000 ADUs |
|
*: The RON depends on the number of non-destructive samples during the integration.
DCR (Double-Correlated Read) refers to two samples, i.e. minimum DIT ~ 1.25s.
NDR (Non-Destructive Read) refers to > 10 samples, i.e. DIT > 10s
The gap
There is a small mis-alignmment between the detectors. Quadrants 2,3 &4 are tilted with respect to quadrant 1 by 0.13, 0.04 & 0.03 degrees respectively.
Details of the gap between detectors
List of filters offered for HAWK-I
Click on the filter name to retrieve the transmission curve
| Filter Name |
Central Wavelength (μm) |
Width (μm) |
Transmission (%) |
| Y |
1.021 |
0.101 |
92 |
| J |
1.258 |
0.154 |
88 |
| H |
1.620 |
0.289 |
95 |
| Ks (1) |
2.146 |
0.324 |
82 |
| Ks (2) |
2.146 |
0.324 |
82 |
|
|
| CH4 |
1.575 |
0.112 |
90 |
| H2 |
2.124 |
0.030 |
90 |
| Brγ |
2.165 |
0.030 |
77 |
|
|
| NB1060 |
1.061 |
0.009 |
70 |
| NB1190(3) |
1.186 |
0.012 |
75 |
| NB0984(4) |
0.984 |
0.005 |
60 |
| NB2090 |
2.095 |
0.020 |
81 |
(1) Filter used from Aug 2007 until Dec 3, 2007. Showed some structure for the Nov 2007 Science Verification run.
(2) New Ks filter, used starting Jan 2008.
(3) Not offered in P90.
(4) Visitor filter, please consult for usage.
|
|
|
Plot of filters efficiency
|
