Quick Reduction of Kast Long-slit Data Using KastRedux

As part of the KastRedux package, there is a routine designed to quickly reduce single object spectra. A fully reduced
1D spectrum is produced in <1 min of time (non-optimal mode) on the orthrus. Assuming all of the paths have been properly setup on the user account
(source ~/.cshrc-xidl), one takes the following steps:

  1. Launch IDL v5.4 after setting these paths

    prompt> idlde -32 (alternatively, idl -32)

  2. Run kast_qckrdx:

    IDL> kast_qckredux, 'obj_file', 'flat_file', spec, sig

  3. Plotting (try one of the following):
    IDL> x_splot, spec, ytwo=sig
  4. IDL> x_specplot, spec, sig, wave=wave, inflg=4

A 1D spectrum and error array will be put in the variables spec and sig. You can plot these with x_splot as noted above.

Options:

  1. ARC='arc_file' :: specifies an arc image
  2. WAVE=wave :: will create a wavelength array provided an Arc image
  3. GRISM='B1' :: Specifies the grism/grating used. Default is 'B1'
  4. /OPTIMAL :: Perform optimal extraction (based on a SDSS routine). This is a particularly expensive option on orthrus, not so bad on a fast machine.
  5. OBJLIN=# (Integer indicating the rough row # of the object; By default, the program assumes the y-center of the 2D-image)
  6. TRACE=array (Input a trace array for non-continuum objects

Limitations:


e-mail: xavier@ucolick.org
last modified 03/18/04