NAME

       fors_subtract_sky_lss - Subtract sky from calibrated long slit exposure

SYNOPSIS

       esorex fors_subtract_sky_lss [OPTIONS] FILE.sof

DESCRIPTION

       This  recipe  is  used  to subtract the sky from wavelength calibrated scientific spectra produced by the
       recipe fors_resample. A simple median signal level is subtracted from each image column.

       In the table below the MXU acronym can be read alternatively as MOS and LSS, depending on the  instrument
       mode of the input data. The acronym SCI may be read STD in case of standard stars observations.

       Note that only LSS or LSS-like MOS/MXU data are to be processed by this recipe.

       Input files:

         DO category:               Type:       Explanation:         Required:
         MAPPED_ALL_SCI_MXU         Raw         Scientific exposure     Y

       Output files:

         DO category:               Data type:  Explanation:
         MAPPED_SCI_MXU             FITS image  Rectified scientific spectra
         MAPPED_SKY_SCI_MXU         FITS image  Rectified sky spectra

OPTIONS

       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_sumflux(7),   fors_trace_flat(7),
       fors_wave_calib(7), fors_wave_calib_lss(7), fors_zeropoint(7)

VERSION

       fors_subtract_sky_lss 5.4.3

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