MOS/OSIS Grisms List
Created by Christian Veillet and maintained by Greg Barrick
Update May 2000 by Eugene Magnier
Grism scans by Sarah Rosser
The MOS/OSIS grism information is provided in two tables, one for
MOS/OSIS visible, the other one for
OSIS-IR.
To view the efficiency curve of a grism click the grism name.
Please note, due to instrument limitations, the accuracy of a curve is good to about 2%.
The spectrophotometer was used to perform the scans which makes the outer edges of the curves suspect.
| |
|
MOS |
OSIS |
| Grism |
Zero deviation (Å) |
Dispersion (Å / mm) |
Loral3 dispersion (Å / pixel) |
STIS2 dispersion (Å / pixel) |
Dispersion (Å / mm) |
Loral3 dispersion (Å / pixel) |
STIS2 dispersion (Å / pixel) |
| U75 |
- |
966.18 |
14.49 |
20.29 |
335.5 |
5.03 |
7.05 |
| V150 |
6291 |
486.17 |
7.29 |
10.21 |
167.7 |
2.52 |
3.52 |
| V150-1 |
6291 |
486.17 |
7.29 |
10.21 |
167.7 |
2.52 |
3.52 |
| R150 |
7293 |
500.08 |
7.50 |
10.50 |
167.7 |
2.52 |
3.52 |
| R150-1 |
6971 |
499.76 |
7.50 |
10.50 |
167.7 |
2.52 |
3.52 |
| B300 |
4584 |
236.44 |
3.55 |
4.96 |
83.9 |
1.26 |
1.76 |
| O300 |
5904 |
239.52 |
3.59 |
5.03 |
83.9 |
1.26 |
1.76 |
| O300-1 |
5904 |
239.56 |
3.59 |
5.03 |
83.9 |
1.26 |
1.76 |
| R300 |
7291 |
236.01 |
3.54 |
4.96 |
83.9 |
1.26 |
1.76 |
| R300-1 |
7230 |
236.25 |
3.54 |
4.96 |
83.9 |
1.26 |
1.76 |
| R300-2 |
7199 |
236.36 |
3.55 |
4.96 |
83.9 |
1.26 |
1.76 |
| B400 |
5186 |
171.08 |
2.57 |
3.59 |
62.9 |
0.94 |
1.32 |
| O600 |
6011 |
104.99 |
1.57 |
2.20 |
41.9 |
0.63 |
0.88 |
| O600-1 |
5978 |
105.06 |
1.58 |
2.21 |
41.9 |
0.63 |
0.88 |
| B600 |
5000 |
106.6 |
1.60 |
2.24 |
41.9 |
0.63 |
0.88 |
| B600-1 |
4986 |
106.6 |
1.60 |
2.24 |
41.9 |
0.63 |
0.88 |
| U900 |
3445 |
59.27 |
0.89 |
1.24 |
27.9 |
0.42 |
0.59 |
| Zero-dev Prism Sand. |
6193 |
2413.73 |
36.21 |
50.69 |
N/A |
N/A |
N/A |
NOTE: the OSIS-IR mode of OSIS is no longer offered. The numbers
given here are provided for reference by past users of that OSIS
mode.
| |
|
OSIS-IR |
| Grism |
Zero deviation (Å) |
Dispersion (Å / mm) |
CFHT-IR dispersion (Å / pixel) |
CFHT-IR spectral range (Å) |
| J120 IR |
12975 |
337.5 |
6.2 |
6350 |
| J360 |
12050 |
112.5 |
2.1 |
2150 |
| H100-1 IR |
16550 |
462.5 |
8.6 |
8800 |
| H316 IR |
16255 |
102.5 |
1.9 |
1940 |
OASIS
The R600 is available only for OASIS.
Although the curve is not as smooth as the results of the other grism scans, we believe it does represent the efficiency of the R600.
The table below lists the minimum spectral ranges for the
various grism / detector / spectrograph combinations. These minimum
ranges represent the distance between observed reference lines in
Gumball calibration spectra. For reference, links are provided to the
observed Gumball spectra. These numbers represent guaranteed spectral
ranges, though for most setups, the real achievable spectral range may
be slightly larger - refer to the Gumball spectra for specific cases
if you want to push the limits of the spectral range available. Cells
in the table without a link have not been directly observe but are a
reasonable extrapolation from other grisms. Cells without any value
have not been measured. Note that only STIS2 spectra have been
measured in this way to date.
