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For custom dither patterns, constraints on the dither step size are imposed by the WASP to ensure that the guide star remains within the guiding camera field of view. From the perspective of IFU users, careful consideration of the dithering options should be made. Below it's an example of custom dithering. Note that pointings are provided for each dither, rather than the dither pointings from an initial position. The three pointings provided in the example below would be executed as part of one only OB. Note that TARGID must be equal to TARGNAME in every row and that the maximum allowed distance between consecutive dither points is 4 arcsec.
# A custom 3-dither pattern LIFU pointing |
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