fcal

 FCAL N1 N2 NF NT GREY RAYLEIGH TEX REBIN FUDGE NFL NFS SET

 FCAL applies flux calibration generated by FLUX. NB. FCAL checks that
 the spectra to be calibrated do not contain the header item TYPE equal 
 to 'FLUX' since that indicates that the spectrum is a flux calibration
 spectrum. 

 Parameters:

   N1, N2 -- Range of spectra to flux calibrate
   NF     -- Flux star slot (0 to remove flux cal, -1 to retain current flux star)
   NT     -- Telluric star slot (0 to remove telluric cal)
   GREY   -- Grey extinction mags/airmass
   RAYLEIGH- Mutiplier to scale Palomar Rayleigh scattering extinction
             It is assumed that the flux star has the same values of
             GREY and RAYLEIGH unless Real header items GREY and RAYLEIGH
             are set which will override the above values. This does not
             apply to the spectra to be calibrated which will use the
             above values whatever.
   TEX    -- Exponent for scaling telluric absorption. Because the
             telluric lines are saturated, the extinction is not linearly
             proportional to airmass. TEX tries to account for this.
             Note that it only really works for low-medium resolution data.
   REBIN  -- Rebinning method to apply telluric cal (Q probably best)
   FUDGE  -- TRUE = Telluric cal scaled to minimise scatter rather than
             simple exponent scaling. 
   NFL, NFS - Smoothing parameters for the fudging process.
   SET    -- Define mask showing where telluric lines are for fudging.

 The routine sets the values of GREY and RAYLEIGH used in the headers

This command belongs to the class: calibration