10.5.4 ACS WFC Allowed Combinations of Aperture, Spectral Element, and Readout
Only a subset of possible combinations of aperture, spectral element, and readout pattern are permitted with the ACS/WFC, and this articles shows these combinations. |
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Format definitions
Boldface type indicates the name of an APT parameter or a value for a parameter.
Black text indicates an important note.
Magenta text indicates available but unsupported parameters (requires prior approval from STScI).
Red text indicates restricted parameters (for STScI use only).
Brown text indicates text file parameters.
Items in brackets - <value> - are required values.
Items in square brackets - [<value>] - are optional.
Table 10.6: Allowed Aperture, Spectral Element & Readout Combinations
| Aperture | Allowed Spectral Elements1 | Readout |
|---|---|---|
WFC | F S | full frame2 |
WFC-FIX | F F | full frame |
| WFC1 | FS | full frame2, 3 |
| WFC1-FIX | F | full frame3 |
| WFC2 | S | full frame2,3 |
| WFC2-FIX | F | full frame3 |
WFCENTER | F | full frame |
WFC1-CTE | F | full frame3 |
| WFC1-CTE | F | full frame3 |
WFC1-512 | F | subarray fixed by STScI |
WFC1-1K | F | subarray fixed by STScI |
WFC1-2K | F | subarray fixed by STScI |
WFC2-2K | F | subarray fixed by STScI |
| WFC1-IRAMP | F I | full frame3 |
| WFC1-MRAMP | F M S | full frame3 |
| WFC2-MRAMP | F M S | full frame3 |
| WFC2-ORAMP | F O | full frame3 |
WFC1-IRAMPQ | F I | subarray fixed by STScI |
WFC1-MRAMPQ | F M S | subarray fixed by STScI |
WFC2-MRAMPQ | F M S | subarray fixed by STScI |
WFC2-ORAMPQ | F O | subarray fixed by STScI |
WFC1A-512 | F | subarray fixed by STScI |
WFC1B-512 | F | subarray fixed by STScI |
WFC2C-512 | F | subarray fixed by STScI |
WFC2D-512 | F | subarray fixed by STScI |
WFC1A-1K | F | subarray fixed by STScI |
WFC1B-1K | F | subarray fixed by STScI |
| WFC2C-1K | F | subarray fixed by STScI |
| WFC2D-1K | F | subarray fixed by STScI |
| WFC1A-2K | F | subarray fixed by STScI |
| WFC1B-2K | F | subarray fixed by STScI |
| WFC2C-2K | F | subarray fixed by STScI |
| WFC2D-2K | F | subarray fixed by STScI |
1F = normal WFC filters and G800L,
S = small elements (polarizers and F892N),
I = inner ramp filter segments,
M = middle ramp filter segments,
O = outer ramp filter segments
2 A subarray fixed by STScI will apply to WFC, WFC1, WFC2 when a small spectral element (polarizer of F892N) is selected.
3 A user specified subarray may be requested via Optional Parameters SIZEAXIS1 and/or SIZEAXIS2.
Related Links
10.5.1 ACS WFC Spectral Elements
10.5.2 ACS WFC Permitted Filter Combinations
10.5.3 ACS WFC Ramp Filter Ranges
10.5.5 ACS SBC Spectral Elements
10.5.6 ACS Aperture Coordinate System