VISIR_OLD_SPC_WCAL(7)

📦
version 4.4.2 · 2 versions
, in debian bookworm, ubuntu noble

VISIR_OLD_SPC_WCAL 💅✨

okay bestie, this is a visir recipe page — specifically the visir_old_spc_wcal one, from the visir recipes collection. buckle up 🎀

🌸 NAME 🌸

visir_old_spc_wcal — the Old DRS detector's Spectroscopic wavelength calibration recipe. it does the wavelength thing. iconic behavior tbh 👑

✨ SYNOPSIS ✨

esorex visir_old_spc_wcal [OPTIONS] FILE.sof

🦋 DESCRIPTION 🦋

So this recipe estimates the dispersion relation using the atmospheric spectrum in a long-slit spectroscopy half-cycle frame. that's the whole job, and it eats it up, no crumbs 🌈

The files listed in the Set Of Frames (sof-file) must be tagged like this — and yes, exactly like this, no improvising bestie:

VISIR-Long-Slit-Spectroscopy-file.fits SPEC_CAL_LMR_WCAL
VISIR-Quantum-Efficiency-Calibration-file.fits SPEC_CAL_QEFF
VISIR-Atmospheric-Emission-Lines-Calibration-file.fits SPEC_CAL_LINES

And additionally (bonus round 🫶), 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 <bool> — automatic detection and correction of bad pixels. it's a bool, default: True. the full name of this option for the EsoRex configuration file is visir.visir_old_spc_wcal.auto_bpm [default = True]. ✨
  • --plot <int> — the recipe can produce a number of predefined plots. Zero means 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 — she's resilient, she moves on 💅

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. It's an int, default: 0. The full name of this option for the EsoRex configuration file is visir.visir_old_spc_wcal.plot [default = 0]. 🎀

  • --slit_skew <float> — Distortion correction: Skew of slit (degrees) (clockwise). it's a float, default: 0.52. The full name of this option for the EsoRex configuration file is visir.visir_old_spc_wcal.phi [default = 0.52]. 🦋
  • --spectrum_skew <float> — Distortion correction: LMR Skew of spectrum (degrees) (counter-clockwise). Not used in High Resolution. it's a float, default: 1.73. The full name of this option for the EsoRex configuration file is visir.visir_old_spc_wcal.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. it's a float, default: -0.8. The full name of this option for the EsoRex configuration file is visir.visir_old_spc_wcal.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. it's a float, default: 0.0. The full name of this option for the EsoRex configuration file is visir.visir_old_spc_wcal.delta [default = 0.0]. 💜
  • --rl <int> — 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). it's an int, default: 0. The full name of this option for the EsoRex configuration file is visir.visir_old_spc_wcal.reject_left [default = 0]. 🙈
  • --rr <int> — 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). it's an int, default: 0. The full name of this option for the EsoRex configuration file is visir.visir_old_spc_wcal.reject_right [default = 0]. 🍓
ngl bestie, 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 — and she listed ALL of them, no cap 👑:

🌈 VERSION 🌈

visir_old_spc_wcal 4.4.2 — that's the one, periodt 💅

🧚 AUTHOR 🧚

Lars Lundin <https://support.eso.org> — thank you king 🫶

💀 BUG REPORTS 💀

Please report any problems to https://support.eso.org. Alternatively, you may send a report to the ESO User Support Department <usd-help@eso.org>. they wanna hear from u fr fr, don't be shy 😭

👑 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

and that's the whole page bestie 💖 this was visir_old_spc_wcal, version 4.4.2, from the VISIR_OLD_SPC_WCAL(7) manual, dated 4.4.2 — slay, go calibrate those wavelengths, iykyk 🌟🦋✨

📦 where this page comes from