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.
| Table of Contents |
|---|
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.
...
A summary of key commands may be obtained using the Help -> Aperture Def Help menu on the menubar.
SET APERTURES FOR BOXCAR EXTRACTION
...
(see below for interactive object profile fitting/optimal extraction)
To define the trace location using the GUI, center the cursor over the emission line (or any location on the image) and press the space bar. A cross will appear to indicate the location of your choice. You may define many crosses and the software will use the median spatial location for the aperture.
...