Provided by: cpl-plugin-fors-doc_5.3.32+dfsg-1_all bug


       fors_remove_bias - Subtract bias from input frame


       esorex fors_remove_bias [OPTIONS] FILE.sof


       This  recipe  is  used  to  subtract  the  overscan and 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  overall bias level between master bias and input raw
       frame. The overscan regions are then trimmed from the result.

       The recipe should allow any fors frame.

       Input files:

         DO category:               Type:       Explanation:         Required:
                         Raw         Raw data frame          Y
         MASTER_BIAS                Calib       Master bias frame       Y

       Output files:

         DO category:               Data type:  Explanation:
         ANY_CAT_UNBIAS             FITS image  Bias subtracted frame


       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'


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


       An   overview   over   the   existing   ESO  pipelines  can  be  found  on  the  web  page

       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 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_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_wave_calib_lss(7), fors_zeropoint(7)


       fors_remove_bias 5.3.32


       Carlo Izzo <>


       Please report any problems to Alternatively, you may send  a  report  to
       the ESO User Support Department <>.


       This  file  is  currently  part  of  the  FORS Instrument Pipeline Copyright (C) 2002-2011
       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