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       hawki_step_subtract_bkg - Background subtraction utility


       esorex hawki_step_subtract_bkg [OPTIONS] FILE.sof


       hawki_step_subtract_bkg -- hawki background subtraction utility.

       This recipe will subtract the given background to the science images.

       The   background   can   be   obtained   from   the   sky   or  object  images  using  the
       hawki_util_compute_bkg utility.

       There are two modes of operation: One single background image that it is subtracted to all
       object images.

       As many background images as objects. A one to one relationship is applied.

       The  files  listed in the Set Of Frames (sof-file) must be tagged: obj_basic_cal-file.fits
       BASIC_CALIBRATED or background-file.fits BKG_IM


       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 hawki 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 hawki pipeline are hawki_cal_dark(7), hawki_cal_distortion(7),
       hawki_cal_flat(7),  hawki_cal_zpoint(7),  hawki_sci_jitter(7),   hawki_step_apply_dist(7),
       hawki_step_basic_calib(7),        hawki_step_combine(7),        hawki_step_compute_bkg(7),
       hawki_step_detect_obj(7),    hawki_step_photom_2mass(7),     hawki_step_refine_offsets(7),
       hawki_step_stats(7),  hawki_step_stitch(7),  hawki_tec_filtchk(7),  hawki_util_gendist(7),


       hawki_step_subtract_bkg 1.8.18


       Cesar Enrique Garcia Dabo <>


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


       This  file  is  part  of  the  HAWKI  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 Street, Fifth Floor,
       Boston, MA 02110-1301 USA