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VISIR_IMG_FF(7) visir recipes VISIR_IMG_FF(7)


visir_img_ff - Flat field recipe


esorex visir_img_ff [OPTIONS] FILE.sof


This recipe computes the flatfield.

The files listed in the Set Of Frames (sof-file) must be tagged either VISIR-flatfield-raw-file.fits IM_CAL_FLAT or VISIR-flatfield-raw-file.fits IM_TECH_FLAT or VISIR-flatfield-raw-file.fits SPEC_CAL_FLAT or VISIR-flatfield-raw-file.fits SPEC_TECH_FLAT

The corresponding primary product will have a FITS card ´HIERARCH ESO PRO CATG´ with a value of IMG_FF or IMG_FF_TECH or SPEC_FF or SPEC_FF_TECH


Low threshold for the bad pixel map (float; default: 0.2). The full name of this option for the EsoRex configuration file is visir.visir_img_ff.low [default = 0.2].
High threshold for the bad pixel map (float; default: 5.0). The full name of this option for the EsoRex configuration file is visir.visir_img_ff.high [default = 5.0].

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.


The full documentation for the visir 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 visir pipeline are visir_img_dark(7), visir_img_reduce(7), visir_img_trans(7), visir_old_img_combine(7), visir_old_img_phot(7), visir_old_spc_obs(7), visir_old_spc_obs_ech(7), visir_old_spc_phot(7), visir_old_spc_phot_ech(7), visir_old_spc_wcal(7), visir_old_spc_wcal_ech(7), visir_old_util_destripe(7), visir_spc_reduce(7), visir_util_apply_calib(7), visir_util_clip(7), visir_util_convert_weight(7), visir_util_detect_shift(7), visir_util_img_std_cat(7), visir_util_join(7), visir_util_qc(7), visir_util_repack(7), visir_util_run_swarp(7), visir_util_spc_std_cat(7), visir_util_spc_txt2fits(7), visir_util_undistort(7)


visir_img_ff 4.4.2


Lars Lundin <>


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


This file is part of the VISIR Instrument Pipeline Copyright (C) 2004, 2005 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 02111-1307 USA

4.4.2 visir_img_ff