--- name: "visir_old_spc_wcal_ech" section: "7" platform: "linux" package: "cpl-plugin-visir-doc" version: "4.4.2+dfsg-1" release: "Debian 12 (Bookworm)" platforms: ["linux"] url: "https://new.carta.tech/visir_old_spc_wcal_ech" --- # visir\_old\_spc\_wcal\_ech(7) Old DRS detector: Spectroscopic wavelength calibration recipe in Echelle ## NAME visir\_old\_spc\_wcal\_ech - Old DRS detector: Spectroscopic wavelength calibration recipe in Echelle ## SYNOPSIS esorex **visir\_old\_spc\_wcal\_ech** \[OPTIONS\] FILE.sof ## DESCRIPTION This recipe estimates the dispersion relation using the atmospheric spectrum in a grism spectroscopy half-cycle frame. The files listed in the Set Of Frames (sof-file) must be tagged: VISIR-Echelle-Spectroscopy-file.fits SPEC\_CAL\_HRG\_WCAL VISIR-Quantum-Efficiency-Calibration-file.fits SPEC\_CAL\_QEFF VISIR-Atmospheric-Emission-Lines-Calibration-file.fits SPEC\_CAL\_LINES Additionally, a bad pixel map with a PRO.CATG of SPEC\_BPM may be added to the Set Of Frames with tag: BPM. ## OPTIONS - **--auto\_bpm** *\* Automatic detection and correction of bad pixels (bool; default: True). The full name of this option for the EsoRex configuration file is **visir.visir\_old\_spc\_wcal\_ech.auto\_bpm** \[default = *True*\]. - **--plot** *\* The recipe can produce a number of predefined plots. Zero means that none of the plots are produced, while increasing values (e.g. 1 or 2) increases the number of plots produced. If the plotting fails a warning is produced, and the recipe continues. The default behaviour of the plotting is to use gnuplot (with option -persist). The recipe currently produces 1D-plots using gnuplot commands. The recipe user can control the actual plotting-command used by the recipe to create the plot by setting the environment variable CPL\_PLOTTER. Currently, if CPL\_PLOTTER is set it must contain the string ´gnuplot´. Setting it to ´cat \> my\_gnuplot\_$$.txt´ causes a number of ASCII-files to be created, which each produce a plot when given as standard input to gnuplot (e.g. later or on a different computer). A finer control of the plotting options can be obtained by writing an executable script, e.g. my\_gnuplot.pl, that executes gnuplot after setting the desired gnuplot options (e.g. set terminal pslatex color) and then setting CPL\_PLOTTER to my\_gnuplot.pl. The predefined plots include plotting of images. Images can be plotted not only with gnuplot, but also using the pnm format. This is controlled with the environment variable CPL\_IMAGER. If CPL\_IMAGER is set to a string that does not contain the word gnuplot, the recipe will generate the plot in pnm format. E.g. setting CPL\_IMAGER to ´display - &´ will produce a gray-scale image using the image viewer display. (int; default: 0). The full name of this option for the EsoRex configuration file is **visir.visir\_old\_spc\_wcal\_ech.plot** \[default = *0*\]. - **--slit\_skew** *\* Distortion correction: Skew of slit (degrees) (clockwise) (float; default: 0.0). The full name of this option for the EsoRex configuration file is **visir.visir\_old\_spc\_wcal\_ech.phi** \[default = *0.0*\]. - **--spectrum\_skew** *\* Distortion correction: LMR Skew of spectrum (degrees) (counter- clockwise). Not used in High Resolution (float; default: 0.0). The full name of this option for the EsoRex configuration file is **visir.visir\_old\_spc\_wcal\_ech.ksi** \[default = *0.0*\]. - **--vert\_arc** *\* 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: 0.0). The full name of this option for the EsoRex configuration file is **visir.visir\_old\_spc\_wcal\_ech.eps** \[default = *0.0*\]. - **--hori\_arc** *\* 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\_old\_spc\_wcal\_ech.delta** \[default = *0.0*\]. - **--orderoffset** *\* Echelle order offset. The offset is relative to the main order. The allowed range of offsets depend on the selected grism. The offset can never exceed +/-4. If the main order is e.g. 8 an order offset of +1 will cause the recipe to base the data reduction on order 9. With a positive order offset the central wavelength becomes smaller while for a negative order offset the central wavelength becomes larger. (int; default: 0). The full name of this option for the EsoRex configuration file is **visir.visir\_old\_spc\_wcal\_ech.orderoffset** \[default = *0*\]. - **--rl** *\* Reject leftmost columns in spectrum extraction, zero means all columns on the left are used. In cross-dispersion mode a (small) negative number may be used (pixel) (int; default: 0). The full name of this option for the EsoRex configuration file is **visir.visir\_old\_spc\_wcal\_ech.reject\_left** \[default = *0*\]. - **--rr** *\* Reject rightmost columns in spectrum extraction, zero means all columns on the right are used. In cross-dispersion mode a (small) negative number may be used (pixel) (int; default: 0). The full name of this option for the EsoRex configuration file is **visir.visir\_old\_spc\_wcal\_ech.reject\_right** \[default = *0*\]. 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. ## SEE ALSO 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_dark/7.md), [*visir\_img\_ff*(7)](/visir_img_ff/7.md), [*visir\_img\_reduce*(7)](/visir_img_reduce/7.md), [*visir\_img\_trans*(7)](/visir_img_trans/7.md), [*visir\_old\_img\_combine*(7)](/visir_old_img_combine/7.md), [*visir\_old\_img\_phot*(7)](/visir_old_img_phot/7.md), [*visir\_old\_spc\_obs*(7)](/visir_old_spc_obs/7.md), [*visir\_old\_spc\_obs\_ech*(7)](/visir_old_spc_obs_ech/7.md), [*visir\_old\_spc\_phot*(7)](/visir_old_spc_phot/7.md), [*visir\_old\_spc\_phot\_ech*(7)](/visir_old_spc_phot_ech/7.md), [*visir\_old\_spc\_wcal*(7)](/visir_old_spc_wcal/7.md), [*visir\_old\_util\_destripe*(7)](/visir_old_util_destripe/7.md), [*visir\_spc\_reduce*(7)](/visir_spc_reduce/7.md), [*visir\_util\_apply\_calib*(7)](/visir_util_apply_calib/7.md), [*visir\_util\_clip*(7)](/visir_util_clip/7.md), [*visir\_util\_convert\_weight*(7)](/visir_util_convert_weight/7.md), [*visir\_util\_detect\_shift*(7)](/visir_util_detect_shift/7.md), [*visir\_util\_img\_std\_cat*(7)](/visir_util_img_std_cat/7.md), [*visir\_util\_join*(7)](/visir_util_join/7.md), [*visir\_util\_qc*(7)](/visir_util_qc/7.md), [*visir\_util\_repack*(7)](/visir_util_repack/7.md), [*visir\_util\_run\_swarp*(7)](/visir_util_run_swarp/7.md), [*visir\_util\_spc\_std\_cat*(7)](/visir_util_spc_std_cat/7.md), [*visir\_util\_spc\_txt2fits*(7)](/visir_util_spc_txt2fits/7.md), [*visir\_util\_undistort*(7)](/visir_util_undistort/7.md) ## VERSION visir\_old\_spc\_wcal\_ech 4.4.2 ## AUTHOR Lars Lundin \ ## BUG REPORTS Please report any problems to https://support.eso.org. Alternatively, you may send a report to the ESO User Support Department \. ## LICENSE 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