10.5.2 ACS WFC Permitted Filter Combinations
Only a subset of possible combinations of spectral elements are permitted with the ACS/WFC, and this article 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.
Introduction
Only a subset of possible combinations of spectral elements are permitted. In the following tables, an "S" indicates combinations that are supported.
Combinations marked with an "A" are Available-but-Unsupported. Combinations marked with an "I" (Internal) indicate filters for DARK or BIAS images.
| The observing mode Imaging Spectropolarimetry – which uses both Grism G800L and Polarizers (POL0V, POL60V, POL120V) – is being offered on a shared risk basis. Proposers should contact their Contact Scientist for guidance and see the ACS Instrument Handbook, the ACS Data Handbook, and footnote 2 of Table 10.3, which also includes a reference to a publication, Hathi et al. (2024), with more specific information. |
Table 10.4: Permitted WFC filter combinations for Mode = ACCUM
Filter Wheel 1 Spectral Element | ||||||||||||||||
F555W | F775W | F625W | F550M | F850LP | POL0UV | POL60UV | POL120UV | F892N | F606W | F502N | G800L | F658N | F475W | CLEAR | ||
Filter Wheel 2 Spectral Element | F660N | A | A | A | I | S | ||||||||||
F814W | A | A | A | S | ||||||||||||
FR388N | A | A | A | S | ||||||||||||
FR423N | S | |||||||||||||||
FR462N | S | |||||||||||||||
F435W | A | A | A | S | ||||||||||||
FR656N | A | A | A | S | ||||||||||||
FR716N | S | |||||||||||||||
FR782N | S | |||||||||||||||
POL0V | A | S | A | A | S | A | S | A | S | S | ||||||
POL60V | A | S | A | A | S | A | S | A | S | S | ||||||
POL120V | A | S | A | A | S | A | S | A | S | S | ||||||
PR200L | S | |||||||||||||||
F344N | S | |||||||||||||||
FR914M | A | A | A | S | ||||||||||||
FR853N | S | |||||||||||||||
FR931N | S | |||||||||||||||
FR459M | A | A | A | S | ||||||||||||
FR647M | S | |||||||||||||||
FR1016N | S | |||||||||||||||
FR505N | A | A | A | S | ||||||||||||
FR551N | S | |||||||||||||||
FR601N | S | |||||||||||||||
| CLEAR | S | S | S | S | S | S | S | S | S | S | S | S | S | S | A |
Related Links
10.5.1 ACS WFC Spectral Elements
10.5.3 ACS WFC Ramp Filter Ranges
10.5.4 ACS WFC Allowed Combinations of Aperture, Spectral Element, and Readout
10.5.5 ACS SBC Spectral Elements
10.5.6 ACS Aperture Coordinate System