visir_util_undistort - Correct the distortion in spectral data

Lars Lundin <https://support.eso.org>

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The files listed in the Set Of Frames (sof-file) must be tagged: VISIR-chopnod-corrected-file.fits CHOPNOD_CORRECTED Optionally, a bad pixel map may be provided: VISIR-bpm-file.fits STATIC_MASK The product(s) will have a FITS card ´HIERARCH ESO PRO CATG´ with a value of: UNDISTORTED The recipe default values for the transformation are only valid for spectral data taken in Low resolution mode

This file is part of the VISIR Instrument Pipeline Copyright (C) 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 02111-1307 USA visir_util_undistort 4.4.2 VISIR_UTIL_UNDISTORT(7)

visir_util_undistort - Correct the distortion in spectral data

--bkgcorrect<bool> Cho-nod correct the data (bool; default: True). The full name of this option for the EsoRex configuration file is visir.visir_util_undistort.bkgcorrect [default = True]. --xl<int> Coordinate in spatial direction. Together with yl it defines the lower point of a rectangle containing only skylines for the wavelength shift detection (int; default: 117). The full name of this option for the EsoRex configuration file is visir.visir_util_undistort.xl [default = 117]. --yl<int> Coordinate in wavelength direction. See xl (int; default: 110). The full name of this option for the EsoRex configuration file is visir.visir_util_undistort.yl [default = 110]. --xh<int> Coordinate in spatial direction. Together with yl it defines the higher point of a rectangle containing only skylines for the wavelength shift detection (int; default: 125). The full name of this option for the EsoRex configuration file is visir.visir_util_undistort.xh [default = 125]. --yh<int> Coordinate in wavelength direction. See xh (int; default: 150). The full name of this option for the EsoRex configuration file is visir.visir_util_undistort.yh [default = 150]. --slit_skew<float> Distortion correction: Skew of slit (degrees) (clockwise) (float; default: 0.52). The full name of this option for the EsoRex configuration file is visir.visir_util_undistort.phi [default = 0.52]. --spectrum_skew<float> Distortion correction: LMR Skew of spectrum (degrees) (counter- clockwise). Not used in High Resolution (float; default: 1.73). The full name of this option for the EsoRex configuration file is visir.visir_util_undistort.ksi [default = 1.73]. --vert_arc<float> Distortion correction: LR Detector vertical curvature (pixel). Reduced by a factor 4 in MR. Not used in HR A-side. Increased by a factor 115/52 in HR B-side (float; default: -0.8). The full name of this option for the EsoRex configuration file is visir.visir_util_undistort.eps [default = -0.8]. --hori_arc<float> Distortion correction: LMR Detector horizontal curvature (pixel). Increased by a factor 1.5 in HR A-side. Reduced by a factor 2 in HR B-side (float; default: 0.0). The full name of this option for the EsoRex configuration file is visir.visir_util_undistort.delta [default = 0.0]. 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: ftp://ftp.eso.org/pub/dfs/pipelines/visir/visir-pipeline-manual-1.4.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 visir pipeline are visir_img_dark(7), visir_img_ff(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)

esorex visir_util_undistort [OPTIONS] FILE.sof

visir_util_undistort 4.4.2