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NAME

       fors_wave_calib_lss - Derive dispersion relation from long-slit arc lamp frame

SYNOPSIS

       esorex fors_wave_calib_lss [OPTIONS] FILE.sof

DESCRIPTION

       This  recipe is used to wavelength calibrate one long slit spectrum, i.e., a FORS spectral
       obtained either in LSS mode or in MOS/MXU mode with  all  slits  at  the  same  offset.  A
       pattern-matching  algorithm  is applied as in recipe fors_detect_spectra. For more details
       on this data reduction strategy please refer to the FORS Pipeline User´s Manual.

       Note that specifying an input GRISM_TABLE  will  set  some  of  the  recipe  configuration
       parameters to default values valid for a particular grism.

       In the table below the LSS acronym can be alternatively read as MOS or MXU.

       Input files:

         DO category:               Type:       Explanation:         Required:
         LAMP_UNBIAS_LSS            Calib       Arc lamp exposure       Y
         MASTER_LINECAT             Calib       Line catalog            Y
         GRISM_TABLE                Calib       Grism table             .

       Output files:

         DO category:               Data type:  Explanation:
         REDUCED_LAMP_LSS           FITS image  Calibrated arc lamp exposure
         DISP_COEFF_LSS             FITS table  Inverse dispersion coefficients
         DISP_RESIDUALS_LSS         FITS image  Image of modeling residuals
         WAVELENGTH_MAP_LSS         FITS image  Wavelengths mapped on CCD
         SLIT_LOCATION_LSS          FITS image  Background subtracted arc frame
         SPECTRAL_RESOLUTION_LSS    FITS table  Spectral resolution table

OPTIONS

       --dispersion <float>
              Expected  spectral dispersion (Angstrom/pixel) (float; default: 0.0). The full name
              of     this     option     for     the     EsoRex     configuration     file     is
              fors.fors_wave_calib_lss.dispersion [default = 0.0].

       --peakdetection <float>
              Initial peak detection threshold (ADU) (float; default: 0.0). The full name of this
              option for the EsoRex configuration file is  fors.fors_wave_calib_lss.peakdetection
              [default = 0.0].

       --wdegree <int>
              Degree  of  wavelength  calibration  polynomial (int; default: 0). The full name of
              this option for the EsoRex configuration file  is  fors.fors_wave_calib_lss.wdegree
              [default = 0].

       --wradius <int>
              Search  radius if iterating pattern-matching with first-guess method (int; default:
              4).  The  full  name  of  this  option  for  the  EsoRex  configuration   file   is
              fors.fors_wave_calib_lss.wradius [default = 4].

       --wreject <float>
              Rejection  threshold  in dispersion relation fit (pixel) (float; default: 0.7). The
              full   name   of   this   option   for   the   EsoRex   configuration    file    is
              fors.fors_wave_calib_lss.wreject [default = 0.7].

       --wcolumn <str>
              Name of line catalog table column with wavelengths (str; default: ´WLEN´). The full
              name    of    this    option    for    the    EsoRex    configuration    file    is
              fors.fors_wave_calib_lss.wcolumn [default = WLEN].

       --startwavelength <float>
              Start  wavelength  in  spectral  extraction (float; default: 0.0). The full name of
              this      option      for      the      EsoRex      configuration      file      is
              fors.fors_wave_calib_lss.startwavelength [default = 0.0].

       --endwavelength <float>
              End  wavelength in spectral extraction (float; default: 0.0). The full name of this
              option for the EsoRex configuration file is  fors.fors_wave_calib_lss.endwavelength
              [default = 0.0].

       --wmode <int>
              Interpolation mode of wavelength solution (0 = no interpolation, 1 = fill gaps, 2 =
              global model) (int; default: 2). The full  name  of  this  option  for  the  EsoRex
              configuration file is fors.fors_wave_calib_lss.wmode [default = 2].

       Note  that  it  is possible to create a configuration file containing these options, along
       with suitable default values. Please refer to the details provided by the 'esorex  --help'
       command.

SEE ALSO

       The  full  documentation  for  the fors pipeline can be downloaded as a PDF file using the
       following URL:

              ftp://ftp.eso.org/pub/dfs/pipelines/fors/fors-pipeline-manual-4.9.pdf

       An  overview  over  the  existing  ESO  pipelines  can  be   found   on   the   web   page
       https://www.eso.org/sci/software/pipelines/.

       Basic documentation about the EsoRex program can be found at the esorex (1) man page.

       It  is  possible  to  call  the  pipelines  from python using the python-cpl package.  See
       https://packages.python.org/python-cpl/index.html for further information.

       The other recipes of  the  fors  pipeline  are  fors_align_sky(7),  fors_align_sky_lss(7),
       fors_bias(7),   fors_calib(7),   fors_config(7),   fors_dark(7),   fors_detect_objects(7),
       fors_detect_spectra(7), fors_extract(7),  fors_extract_objects(7),  fors_extract_slits(7),
       fors_flatfield(7),   fors_img_science(7),  fors_img_screen_flat(7),  fors_img_sky_flat(7),
       fors_normalise_flat(7),  fors_photometry(7),   fors_pmos_calib(7),   fors_pmos_extract(7),
       fors_pmos_science(7),      fors_remove_bias(7),     fors_resample(7),     fors_science(7),
       fors_spec_mflat(7),   fors_subtract_sky(7),   fors_subtract_sky_lss(7),   fors_sumflux(7),
       fors_trace_flat(7), fors_wave_calib(7), fors_zeropoint(7)

VERSION

       fors_wave_calib_lss 5.3.32

AUTHOR

       Carlo Izzo <usd-help@eso.org>

BUG REPORTS

       Please  report  any  problems to usd-help@eso.org. Alternatively, you may send a report to
       the ESO User Support Department <usd-help@eso.org>.

LICENSE

       This file is currently part of  the  FORS  Instrument  Pipeline  Copyright  (C)  2002-2010
       European Southern Observatory

       This program is free software; you can redistribute it and/or modify it under the terms of
       the GNU General Public License as  published  by  the  Free  Software  Foundation;  either
       version 2 of the License, or (at your option) any later version.

       This  program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
       without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR  PURPOSE.
       See the GNU General Public License for more details.

       You should have received a copy of the GNU General Public License along with this program;
       if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,  Boston,
       MA  02110-1301  USA