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Generating the FIRE Structure
Firehose stores all information about which flat, arc, and telluric files are paired with which science frames in an IDL structure for portability. The next step of the reduction process is to generate this structure, and then edit it to ensure it reflects the pairings you want (e.g. eliminating saturated tellurics, etc.). This procedure is done by a largely automated, and fairly complicated procedure. It performs the following procedures without user intervention:
- Read in the headers for all objects, and record telescope RA, DEC
- Check telescope pointing against the input Magellan object catalog, and assign each science target a unique object ID and common object name
- Cross-check pointing against a list of known A0V telluric calibrators; flag standards accordingly and record B and V mags if available.
- Assign ThAr arc frames to science and telluric exposures by checking for matches in telescope pointing, and asserting that lamps are on and mirrors in.
- Match telluric frames to science targets by searching for the closest match to each science target in UT obs, airmass, and sky angle
- Match flat field frames to each object or standard
These operations are all performed when the "Generate Structure" button is selected.
Object Extraction
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Telluric Correction / Flux Calibration
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