SYNOPSIS

esorex fors_align_sky [OPTIONS] FILE.sof

DESCRIPTION

This recipe is used to align the wavelength solution based on the arc lamp exposure on a set of sky lines observed on a scientific exposure.

The input rectified frames are produced by the recipe fors_extract_slits.

An input catalog of sky lines can be specified, otherwise an internal one is used.

This recipe should be applied to multi-slit MOS/MXU data: for LSS or long-slit like data (MOS/MXU with all slits at the same offset) use recipe fors_align_sky_lss instead. Please refer to the FORS Pipeline User's Manual for more details.

In the table below the MXU acronym can be alternatively read as MOS, and SCI as STD.

Input files:

  DO category:               Type:       Explanation:         Required:
  RECTIFIED_ALL_SCI_MXU
  or RECTIFIED_SKY_SCI_MXU   Calib       Frame with sky lines    Y
  SPATIAL_MAP_MXU            Calib       Spatial coordinate map  Y
  CURV_COEFF_MXU             Calib       Spectral curvature      Y
  SLIT_LOCATION_MXU          Calib       Slit location on CCD    Y
  DISP_COEFF_MXU             Calib       Dispersion solution     Y
  MASTER_SKYLINECAT          Calib       Catalog of sky lines    .

  GRISM_TABLE                Calib       Grism table             .

Output files:

  DO category:               Data type:  Explanation:
  SKY_SHIFTS_SLIT_SCI_MXU    FITS table  Observed sky lines offsets
  WAVELENGTH_MAP_SCI_MXU     FITS image  Wavelength mapped on CCD
  DISP_COEFF_SCI_MXU         FITS image  Upgraded dispersion solution

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_align_sky.dispersion [default = 0.0].

--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_align_sky.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_align_sky.endwavelength [default = 0.0].

--skyalign <long>

Polynomial order for sky lines alignment (long; default: 0). The full name of this option for the EsoRex configuration file is fors.fors_align_sky.skyalign [default = 0].

--wcolumn <str>

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

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.

VERSION

fors_align_sky 5.3.5

AUTHOR

Carlo Izzo <[email protected]>

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