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fors_pmos_calib - Determination of the extraction mask

FORS_PMOS_CALIB(7) fors recipes FORS_PMOS_CALIB(7)

NAME

fors_pmos_calib - Determination of the extraction mask
 

SYNOPSIS

esorex fors_pmos_calib [OPTIONS] FILE.sof
 

DESCRIPTION

This recipe is used to identify reference lines on PMOS arc lamp exposures, and trace the spectral edges on the corresponding flat field exposures. This information is used to determine the spectral extraction mask to be applied in the scientific data reduction, performed with the recipe fors_science.
This recipe accepts both FORS1 and FORS2 frames. The input arc lamps and flat field exposures are assumed to be obtained quasi-simultaneously, so that they would be described by exactly the same instrument distortions.
A line catalog must be specified, containing the wavelengths of the reference arc lamp lines used for the wavelength calibration. A grism table (typically depending on the instrument mode, and in particular on the grism used) may also be specified: this table contains a default recipe parameter setting to control the way spectra are extracted for a specific instrument mode, as it is used for automatic run of the pipeline on Paranal and in Garching. If this table is specified, it will modify the default recipe parameter setting, with the exception of those parameters which have been explicitly modifyed on the command line.
If a grism table is not specified, the input recipe parameters values will always be read from the command line, or from an esorex configuration file if present, or from their generic default values (that are rarely meaningful). Finally a master bias frame must be input to this recipe.
The products SPECTRA_DETECTION_PMOS, SLIT_MAP_PMOS, and DISP_RESIDUALS_PMOS, are just created if the --check parameter is set to true.
The MASTER_DISTORTION_TABLE is marked as required, but it is not so if all slits have different offsets, and in the case of FORS1 observations made with the old TK2048EB4-1 1604 chip read in windowed mode (2048x400)
 
Input files:
 

DO category: Type: Explanation: Required:
SCREEN_FLAT_PMOS Raw Flat field exposures Y
LAMP_PMOS Raw Arc lamp exposure Y
MASTER_BIAS or BIAS Calib Bias frame Y
MASTER_LINECAT Calib Line catalog Y
GRISM_TABLE Calib Grism table .

MASTER_DISTORTION_TABLE Calib Master distortions table Y
 
Output files:
 

DO category: Data type: Explanation:
MASTER_SCREEN_FLAT_PMOS FITS image Combined (sum) flat field
MASTER_NORM_FLAT_PMOS FITS image Normalised flat field
MAPPED_SCREEN_FLAT_PMOS FITS image Wavelength calibrated flat field
MAPPED_NORM_FLAT_PMOS FITS image Wavelength calibrated normalised flat
REDUCED_LAMP_PMOS FITS image Wavelength calibrated arc spectrum
DISP_COEFF_PMOS FITS table Inverse dispersion coefficients
DISP_RESIDUALS_PMOS FITS image Residuals in wavelength calibration
DISP_RESIDUALS_TABLE_PMOS FITS table Residuals in wavelength calibration
DELTA_IMAGE_PMOS FITS image Offset vs linear wavelength calib
WAVELENGTH_MAP_PMOS FITS image Wavelength for each pixel on CCD
SPECTRA_DETECTION_PMOS FITS image Check for preliminary detection
SLIT_MAP_PMOS FITS image Map of central wavelength on CCD
CURV_TRACES_PMOS FITS table Spectral curvature traces
CURV_COEFF_PMOS FITS table Spectral curvature coefficients
SPATIAL_MAP_PMOS FITS image Spatial position along slit on CCD
SPECTRAL_RESOLUTION_PMOS FITS table Resolution at reference arc lines
SLIT_LOCATION_PMOS FITS table Slits on product frames and CCD
 
 
 

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_pmos_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_pmos_calib.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_pmos_calib.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_pmos_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_pmos_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_pmos_calib.wcolumn [default = WLEN].
--cdegree <long>
Degree of spectral curvature polynomial (long; default: 0). The full name of this option for the EsoRex configuration file is fors.fors_pmos_calib.cdegree [default = 0].
--cmode <long>
Interpolation mode of curvature solution (0 = no interpolation, 1 = fill gaps, 2 = global model) (long; default: 1). The full name of this option for the EsoRex configuration file is fors.fors_pmos_calib.cmode [default = 1].
--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_pmos_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_pmos_calib.endwavelength [default = 0.0].
--stack_method <str>
Frames combination method (str; default: ´average´). The full name of this option for the EsoRex configuration file is fors.fors_pmos_calib.stack_method [default = average].
--minrejection <long>
Number of lowest values to be rejected (long; default: 1). The full name of this option for the EsoRex configuration file is fors.fors_pmos_calib.minrejection [default = 1].
--maxrejection <long>
Number of highest values to be rejected (long; default: 1). The full name of this option for the EsoRex configuration file is fors.fors_pmos_calib.maxrejection [default = 1].
--klow <float>
Low threshold in ksigma method (float; default: 3.0). The full name of this option for the EsoRex configuration file is fors.fors_pmos_calib.klow [default = 3.0].
--khigh <float>
High threshold in ksigma method (float; default: 3.0). The full name of this option for the EsoRex configuration file is fors.fors_pmos_calib.khigh [default = 3.0].
--kiter <long>
Max number of iterations in ksigma method (long; default: 999). The full name of this option for the EsoRex configuration file is fors.fors_pmos_calib.kiter [default = 999].
--ddegree <long>
Degree of flat field fitting polynomial along dispersion direction (long; default: -1). The full name of this option for the EsoRex configuration file is fors.fors_pmos_calib.ddegree [default = -1].
--dradius <long>
Smooth box radius for flat field along dispersion direction (long; default: 10). The full name of this option for the EsoRex configuration file is fors.fors_pmos_calib.dradius [default = 10].
--qc <bool>
Compute QC1 parameters (bool; default: True). The full name of this option for the EsoRex configuration file is fors.fors_pmos_calib.qc [default = True].
--check <bool>
Create intermediate products (bool; default: False). The full name of this option for the EsoRex configuration file is fors.fors_pmos_calib.check [default = False].
 
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_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_pmos_calib 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_pmos_calib