fors_wave_calib7

Usage

Overview

This recipe is used to wavelength calibrate MOS/MXU slit spectra contained in the rectified arc lamp exposure produced with recipe fors_extract_slits.

A pattern-matching algorithm is applied as in recipe fors_detect_spectra.

The input spatial map is used in the production of the wavelength map.

Use recipe fors_wave_calib_lss for LSS data, or for MOS/MXU data where all slits have the same offset. 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 MXU acronym can be alternatively read as MOS.

Input files:

DO category: Type: Explanation: Required:
SPATIAL_MAP_MXU Calib Spatial map Y
RECTIFIED_LAMP_MXU Calib Rectified arc exposure Y
SLIT_LOCATION_MXU Calib Slit location table Y
CURV_COEFF_MXU Calib Spectral curvature Y
MASTER_LINECAT Calib Line catalog Y
GRISM_TABLE Calib Grism table .

Output files:

DO category: Data type: Explanation:
REDUCED_LAMP_MXU FITS image Calibrated arc lamp exposure
DISP_COEFF_MXU FITS table Inverse dispersion coefficients
DISP_RESIDUALS_MXU FITS image Image of modeling residuals
WAVELENGTH_MAP_MXU FITS image Wavelengths mapped on CCD
SPECTRAL_RESOLUTION_MXU 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.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.peakdetection [default = 0.0].

--wdegree <int>

Degree of wavelength calibration polynomial (int; default: 0). The full name of this option for the EsoRex configuration file is fors.fors_wave_calib.wdegree [default = 0].

--wradius <int>

Search radius if iterating pattern-matching with first-guess method (int; default: 4). The full name of this option for the EsoRex configuration file is fors.fors_wave_calib.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.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.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.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.endwavelength [default = 0.0].

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.

Version

fors_wave_calib 5.5.6