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fors_wave_calib_lss - Derive dispersion relation from long-slit arc lamp frame

FORS_WAVE_CALIB_LSS(7) fors recipes FORS_WAVE_CALIB_LSS(7)

NAME

fors_wave_calib_lss - Derive dispersion relation from long-slit arc lamp frame
 

SYNOPSIS

esorex fors_wave_calib_lss [OPTIONS] FILE.sof
 

DESCRIPTION

This recipe is used to wavelength calibrate one long slit spectrum, i.e., a FORS spectral obtained either in LSS mode or in MOS/MXU mode with all slits at the same offset. A pattern-matching algorithm is applied as in recipe fors_detect_spectra. For more details on this data reduction strategy please refer to the FORS Pipeline User´s Manual.
Note that specifying an input GRISM_TABLE will set some of the recipe configuration parameters to default values valid for a particular grism.
In the table below the LSS acronym can be alternatively read as MOS or MXU.
Input files:
 

DO category: Type: Explanation: Required:
LAMP_UNBIAS_LSS Calib Arc lamp exposure Y
MASTER_LINECAT Calib Line catalog Y
GRISM_TABLE Calib Grism table .
Output files:
 

DO category: Data type: Explanation:
REDUCED_LAMP_LSS FITS image Calibrated arc lamp exposure
DISP_COEFF_LSS FITS table Inverse dispersion coefficients
DISP_RESIDUALS_LSS FITS image Image of modeling residuals
WAVELENGTH_MAP_LSS FITS image Wavelengths mapped on CCD
SLIT_LOCATION_LSS FITS image Background subtracted arc frame
SPECTRAL_RESOLUTION_LSS FITS table Spectral resolution table
 
 
 

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_wave_calib_lss.dispersion [default = 0.0].
--peakdetection <float>
Initial peak detection threshold (ADU) (float; default: 0.0). The full name of this option for the EsoRex configuration file is fors.fors_wave_calib_lss.peakdetection [default = 0.0].
--wdegree <long>
Degree of wavelength calibration polynomial (long; default: 0). The full name of this option for the EsoRex configuration file is fors.fors_wave_calib_lss.wdegree [default = 0].
--wradius <long>
Search radius if iterating pattern-matching with first-guess method (long; default: 4). The full name of this option for the EsoRex configuration file is fors.fors_wave_calib_lss.wradius [default = 4].
--wreject <float>
Rejection threshold in dispersion relation fit (pixel) (float; default: 0.7). The full name of this option for the EsoRex configuration file is fors.fors_wave_calib_lss.wreject [default = 0.7].
--wcolumn <str>
Name of line catalog table column with wavelengths (str; default: ´WLEN´). The full name of this option for the EsoRex configuration file is fors.fors_wave_calib_lss.wcolumn [default = WLEN].
--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_wave_calib_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_wave_calib_lss.endwavelength [default = 0.0].
--wmode <long>
Interpolation mode of wavelength solution (0 = no interpolation, 1 = fill gaps, 2 = global model) (long; default: 2). The full name of this option for the EsoRex configuration file is fors.fors_wave_calib_lss.wmode [default = 2].
 
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 http://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 http://packages.python.org/python-cpl/index.html for further information.
The other recipes of the fors pipeline are fors_align_sky(7), 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_zeropoint(7)
 

VERSION

fors_wave_calib_lss 5.3.23
 

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
 
5.3.23 fors_wave_calib_lss