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By selecting "Interactive / User Defined" on the Object Finding section of the Extraction preferences, you will be presented with a GUI to aid in setting extraction parameters as the pipeline runs. Depending on the type of data being used, you may set an object trace center and aperture for simple boxcar style extraction, or you may fit an object profile to a particular emission line and use this as the weighting function for optimal extraction.
The selection of boxcar versus optimal is an either/or choice, you can't run both together. But they are launched from the same GUI. The PRELIMINARIES section below describes this GUI and then you can refer to the relevant section for your particular choice of extraction method.
PRELIMINARIES
For each exposure, FIREHOSE first performs a crude first-pass sky subtraction to assist in locating the object in the 2D frame. A display GUI will pop up showing the sky-subtracted frame. Below I show an example of this GUI for an object showing a single emission line near the center of the display but no continuum.
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