 |
|
CanariCam uses four gratings mounted on a turret to provide imaging and (a) low resolution 10mm, (b) high resolution 10mm, (c) low resolution 20mm, (d) high resolution 20mm spectroscopy.
The resolutions for the spectroscopic modes are outlined below.
|
Characteristic |
10mm
LR |
20mm
LR |
10mm
HR |
20mm
HR |
|
Central
lc
(mm) |
10.5 |
20.5 |
10.5 |
20.5 |
|
Blaze l
(mm) |
9.87 |
19.96 |
10.08 |
20.18 |
|
Blaze Angle (°) |
2.6 |
4.0 |
16.4 |
20.8 |
|
Lines/mm |
9.1 |
6.1 |
56.0 |
35.2 |
|
DlDet
(mm) |
6 |
9 |
0.98 |
1.54 |
|
Angle of incidence ( °) |
14.8 |
15.7 |
29.5 |
33.7 |
|
Angle of diffraction (°)
at lcenter |
9.2 |
8.3 |
5.5 |
9.7 |
|
R=l/Dl |
175 |
120 |
1313 |
891 |
|
Smallest resolvable Dl
(mm) |
0.06 |
0.17 |
0.008 |
0.023 |
The gratings that will be delivered to UF shortly are shown in the table below.
| Grating Name | pdf plot | Image in the lab |
| Low Resolution 10mm | 10um_low_res | |
| High Resolution 10mm | 10um_hi_res | |
| Low Resolution 20mm | 20um_low_res | |
| High Resolution 20mm | 20um_hi_res |
Several slits will be available, to match the wavelength, conditions and resolution. The slits are listed below, along with their suggested use:
|
Slit
Width [arcsec] |
Slit
Width [pixels] |
Comments |
|
0.17 |
2.08 |
10 mm
HR (lmax/D) lmax
= 8.4 mm |
|
0.20 |
2.45 |
10 mm
HR (lmax/D) lmax
= 9.9 mm |
|
0.23 |
2.85 |
10 mm
HR (lmax/D) lmax
= 11.5 mm |
|
0.26 |
3.25 |
10 mm
LR/HR (lmax/D) lmax
= 13.1 mm |
|
0.36 |
4.31 |
20 mm
HR (lmax/D) lmax
= 17.4 mm |
|
0.41 |
5.01 |
20 mm
HR (lmax/D) lmax
= 20.2 mm |
|
0.45 |
5.70 |
20 mm
HR (lmax/D) lmax
= 23.0 mm |
|
0.52 |
6.50 |
10 mm
LR (2lmax/D) lmax
= 13.1 mm & 20 mm
LR/HR (lmax/D) lmax
= 26.2 mm |
|
1.04 |
13.0 |
20 mm
LR (2lmax/D) lmax
= 26.2 mm |
|
|
Chris Packham; May 19, 2003
