FORS_ALIGN_SKY(7)

📦 version 5.5.7, in ubuntu jammy, ubuntu noble

💫 FORS_ALIGN_SKY 💫

okay bestie, buckle up, we're doing fors_align_sky — that's the FORS_ALIGN_SKY(7) page, a fors recipe, and it's literally the glow-up artist for your wavelength solution ✨

🌈 NAME 🌈

fors_align_sky — Upgrade wavelength solution using sky lines 🦋

🎀 SYNOPSIS 🎀

esorex fors_align_sky [OPTIONS] FILE.sof

that's it. that's the whole vibe. one command, one .sof file, endless possibilities 💅

✨ DESCRIPTION ✨

So the whole point of this recipe? It aligns your wavelength solution — the one that came off the arc lamp exposure — but it does it using a set of sky lines observed on a scientific exposure. Like, it's taking your arc-lamp-based solution and going "okay but let's double-check you against actual sky, queen." 💖

The input rectified frames here are the ones produced by the recipe fors_extract_slits.

You can hand it your own input catalog of sky lines if you're feeling extra. If you don't? No worries, it's got an internal one it'll just use. 🫶

important, no cap: This recipe is meant for multi-slit MOS/MXU data. If you've got LSS or long-slit-like data (that's MOS/MXU with all slits at the same offset), you want recipe fors_align_sky_lss instead. Periodt. Please refer to the FORS Pipeline User´s Manual for more details.

Also, a little legend for the tables below: the MXU acronym can be alternatively read as MOS, and SCI as STD. iykyk 🧚

📥 Input files

  • RECTIFIED_ALL_SCI_MXU or RECTIFIED_SKY_SCI_MXU — DO category: Calib — Type: Frame with sky lines — Required: Y
  • SPATIAL_MAP_MXU — DO category: Calib — Type: Spatial coordinate map — Required: Y
  • CURV_COEFF_MXU — DO category: Calib — Type: Spectral curvature — Required: Y
  • SLIT_LOCATION_MXU — DO category: Calib — Type: Slit location on CCD — Required: Y
  • DISP_COEFF_MXU — DO category: Calib — Type: Dispersion solution — Required: Y
  • MASTER_SKYLINECAT — DO category: Calib — Type: Catalog of sky lines — Required: .
  • GRISM_TABLE — DO category: Calib — Type: Grism table — Required: .

📤 Output files

  • SKY_SHIFTS_SLIT_SCI_MXU — Data type: FITS table — Observed sky lines offsets
  • WAVELENGTH_MAP_SCI_MXU — Data type: FITS image — Wavelength mapped on CCD
  • DISP_COEFF_SCI_MXU — Data type: FITS image — Upgraded dispersion solution

like look at those outputs. upgraded dispersion solution?? it's giving main character energy fr fr 👑

💅 OPTIONS 💅

  • --dispersion <float> — Expected spectral dispersion, in Angstrom/pixel (float; default: 0.0). The full name of this option for the EsoRex configuration file is fors.fors_align_sky.dispersion [default = 0.0].
  • --startwavelength <float> — Start wavelength in spectral extraction (float; default: 0.0). The full name of this option for the EsoRex configuration file is fors.fors_align_sky.startwavelength [default = 0.0].
  • --endwavelength <float> — End wavelength in spectral extraction (float; default: 0.0). The full name of this option for the EsoRex configuration file is fors.fors_align_sky.endwavelength [default = 0.0].
  • --skyalign <int> — Polynomial order for sky lines alignment (int; default: 0). The full name of this option for the EsoRex configuration file is fors.fors_align_sky.skyalign [default = 0].
  • --wcolumn <str> — Name of sky line catalog table column with wavelengths (str; default: ´WLEN´). The full name of this option for the EsoRex configuration file is fors.fors_align_sky.wcolumn [default = WLEN].
little heads-up bestie: 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 fors pipeline can be downloaded as a PDF file using the following URL:

ftp://ftp.eso.org/pub/dfs/pipelines/fors/fors-pipeline-manual-4.9.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 fors pipeline are fors_align_sky_lss(7), fors_bias(7), fors_calib(7), fors_config(7), fors_dark(7), fors_detect_objects(7), fors_detect_spectra(7), fors_extract(7), fors_extract_objects(7), fors_extract_slits(7), fors_flatfield(7), fors_img_science(7), fors_img_screen_flat(7), fors_img_sky_flat(7), fors_normalise_flat(7), fors_photometry(7), fors_pmos_calib(7), fors_pmos_extract(7), fors_pmos_science(7), fors_remove_bias(7), fors_resample(7), fors_science(7), fors_spec_mflat(7), fors_subtract_sky(7), fors_subtract_sky_lss(7), fors_sumflux(7), fors_trace_flat(7), fors_wave_calib(7), fors_wave_calib_lss(7), fors_zeropoint(7)

⭐ VERSION ⭐

fors_align_sky 5.5.7

👑 AUTHOR 👑

Carlo Izzo <usd-help@eso.org>

😭 BUG REPORTS 😭

Please report any problems to usd-help@eso.org. Alternatively, you may send a report to the ESO User Support Department <usd-help@eso.org>.

📜 LICENSE 📜

This file is currently part of the FORS Instrument Pipeline Copyright (C) 2002-2010 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 02110-1301 USA

and that's the whole page bestie!! 💖✨🦋 you just read fors_align_sky version 5.5.7, straight from the fors recipes collection — mwah, slay, go align some sky lines 🎀💅🫶

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