NAME

       fors_remove_bias - Subtract bias from input frame

SYNOPSIS

       esorex fors_remove_bias [OPTIONS] FILE.sof

DESCRIPTION

       This  recipe  is  used  to  subtract the master bias, produced by the recipe fors_bias, from one raw data
       frame. The overscan regions, if present, are used to compensate for variations of the bias level  between
       master bias and input raw frame. The overscan regions are then trimmed from the result.

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

       Input files:

         DO category:               Type:       Explanation:         Required:
         LAMP_MXU
         or SCIENCE_MXU
         or STANDARD_MXU            Raw         Raw data frame          Y
         MASTER_BIAS                Calib       Master bias frame       Y

       Output files:

         DO category:               Data type:  Explanation:
         LAMP_UNBIAS_MXU
         or SCIENCE_UNBIAS_MXU
         or STANDARD_UNBIAS_MXU     FITS image  Bias subtracted frame

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-4.7.pdf

       An   overview   over   the   existing   ESO   pipelines    can    be    found    on    the    web    page
       http://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
       http://packages.python.org/python-cpl/index.html for further information.

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

VERSION

       fors_remove_bias 4.11.12

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

fors_remove_bias                                     4.11.12                                 FORS_REMOVE_BIAS(7)