FIGARO -- General spectral reduction

[SUN/86]

This is a general data reduction system written by Keith Shortridge at Caltech and the AAO. Most people find it of greatest use in the reduction of spectroscopic data, though it also has powerful image and data cube manipulation facilities. Starlink recommends FIGARO as the most complete spectroscopic data reduction system in the Collection. Examples of its facilities are:

• Analyse absorption lines interactively.
• Aperture photometry.
• Calibrate B stars.
• Calibrate flat fields.
• Calibrate using flux calibration standards.
• Calibrate wavelengths of spectra.
• Correct S-distortion.
• Extract spectra from images and images from data cubes, and insert spectra into images and images into data cubes.
• Extract spectra from images taken using optical fibres.
• Fit Gaussians to lines in a spectrum interactively.
• Generate and apply a spectrum of extinction coefficients.
• Input, output, and display data.
• Look at the contents of data arrays, other than graphically.
• Manipulate complex data structures (mainly connected with Fourier transforms).
• Manipulate data arrays `by hand'.
• Manipulate images and spectra (arithmetic and more complicated).
• Process data taken using FIGS (the AAO's Fabry-Perot Infra-Red Grating Spectrometer).
• Process echelle data, in particular the UCL echelle in use at the AAO.

At present, a number of related packages are bundled with FIGARO. In future, these may be released as separate items. They include:

TWODSPEC

[SUN/16]

This reduces and analyses long-slit and optical-fibre array spectra. A number of its functions are useful outside the area of spectroscopy. The main application areas are:

• Line profile analysis; LONGSLIT analyses calibrated long-slit spectra. For example, it can fit Gaussians, either manually or automatically, in batch. It can handle data with two spatial dimensions, such as TAURUS data. FIBDISP provides further options useful for such data, although it is primarily designed for fibre array data. An extensive range of options is available, especially for output.
• Two-dimensional arc calibration.
• Geometrical distortion correction; S-distortion and Line curvature.
• Conversion between FIGARO and IRAF data formats.
• Display programs.
• Removing continua.

To run FIGARO:

from ICL:

   ICL> HELP FIGARO
   ICL> FIGARO
   ICL> HELP FIGARO CLASSIFIED
   ICL> (any FIGARO commands)

from DCL:

   $ FIGARO
   $ HELP FIGARO
   $ HELP FIGARO CLASSIFIED
   $ (any FIGARO commands)