FORS_ALIGN_SKY_LSS(7)

🌈 FORS_ALIGN_SKY_LSS ✨

okay bestie, gather round, because this is the fors_align_sky_lss manual page from the fors recipes, and she is lowkey a baddie 💅

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🦋 NAME

fors_align_sky_lss — upgrade wavelength solution using sky lines. yes that's the whole vibe, she takes your wavelength solution and makes it better, no cap.

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✨ SYNOPSIS

esorex fors_align_sky_lss [OPTIONS] FILE.sof

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💖 DESCRIPTION

so here's the tea 🍓: this recipe aligns the wavelength solution — the one based on your arc lamp exposure — using a whole set of sky lines that got observed on a scientific exposure. it's giving glow-up, but for wavelengths.

The input scientific frames are the ones produced by the recipes fors_remove_bias and fors_flatfield. You can specify an input catalog of sky lines if you want, or an internal one gets used instead. your call, queen 👑

This recipe should be applied to LSS or long-slit-like data (that means MOS/MXU with all slits at the same offset, iykyk). For multi-slit MOS/MXU data, use recipe fors_align_sky instead — she's the one built for that job. Please refer to the FORS PIpeline User´s Manual for more details.

In the table below, the MXU acronym can alternatively be read as MOS and LSS, and SCI as STD. cute, right? interchangeable ✨

📥 Input files:

• SCIENCE_UNBIAS_MXU or SCIENCE_UNFLAT_MXU or STANDARD_UNBIAS_MXU or STANDARD_UNFLAT_MXU — Type: Calib — Frame with sky lines — Required: Y
• DISP_COEFF_MXU — Type: Calib — Dispersion solution — Required: Y
• SLIT_LOCATION_MXU — Type: Calib — Slit location on CCD — Required: Y
• MASTER_SKYLINECAT — Type: Calib — Catalog of sky lines — Required: .
• GRISM_TABLE — Type: Calib — Grism table — Required: .

📤 Output files:

• SKY_SHIFTS_LONG_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

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🎀 OPTIONS

one bullet per option, no skipping, we respect the whole menu 💜

• --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_lss.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_lss.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_lss.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_lss.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_lss.wcolumn [default = WLEN].

ngl, it's also 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. 🫶

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🔥 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(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) 💫

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👑 VERSION

fors_align_sky_lss 5.5.7

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🌸 AUTHOR

Carlo Izzo <usd-help@eso.org>

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💀 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>. they're nice, they don't bite, fr fr 🙈

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📜 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

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okay that's the whole page bestie, every single flag, every file, every URL, nothing skipped 🧚

signing off: this was fors_align_sky_lss version 5.5.7, dated 5.5.7, from the fors recipes manual, page FORS_ALIGN_SKY_LSS(7) — stan behavior, go forth and align 💅✨