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FORS_ALIGN_SKY(7) fors recipes FORS_ALIGN_SKY(7)

NAME

fors_align_sky - Upgrade wavelength solution using sky lines

SYNOPSIS

esorex fors_align_sky [OPTIONS] FILE.sof

DESCRIPTION

This recipe is used to align the wavelength solution based on the arc lamp exposure on a set of sky lines observed on a scientific exposure.

The input rectified frames are produced by the recipe fors_extract_slits.

An input catalog of sky lines can be specified, otherwise an internal one is used.

This recipe should be applied to multi-slit MOS/MXU data: for LSS or long-slit like data (MOS/MXU with all slits at the same offset) use recipe fors_align_sky_lss instead. Please refer to the FORS Pipeline User´s Manual for more details.

In the table below the MXU acronym can be alternatively read as MOS, and SCI as STD.

Input files:

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

GRISM_TABLE Calib Grism table .

Output files:

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

OPTIONS

--dispersion <float>
Expected spectral dispersion (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].

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 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 5.5.3

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

5.5.3 fors_align_sky