Alternative to kmo_illumination based on flatfield frames.
esorex kmo_illumination_flat [OPTIONS] FILE.sof
This recipe creates the spatial non-uniformity calibration frame needed for all three detectors. It must be called after the kmo_wave_cal-recipe, which generates the spectral calibration frame needed in this recipe. As input at least a flatfield frame is required.
Contrary to kmo_illumination it doesn\'t use flat sky frames but rather the flatfield frames from the internal flat lamp. This recipe can be used if no acceptable flat sky frames are available.
The created product, the illumination correction, can be used as input for kmo_std_star and kmo_sci_red.
--imethod The interpolation method used for reconstruction.
--flux Specify if flux conservation should be applied.
--neighborhoodRange Defines the range to search for neighbors during reconstruction
--b_samples The number of samples in spectral direction for the reconstructed cube.
Ideally this number should be greater than 2048, the detector size.
--b_start --b_end Used to define manually the start and end wavelength for the reconstructed cube. By default the internally defined values are used.
--cmethod Following methods of frame combination are available:
* \'ksigma\' (Default)
An iterative sigma clipping. For each position all pixels in the spectrum
are examined. If they deviate significantly, they will be rejected according
to the conditions:
val > mean + stdev * cpos_rej
and
val < mean - stdev * cneg_rej
where --cpos_rej, --cneg_rej and --citer are the corresponding configuration
parameters. In the first iteration median and percentile level are used.
* \'median\' At each pixel position the median is calculated.
* \'average\' At each pixel position the average is calculated.
* \'sum\' At each pixel position the sum is calculated.
* \'min_max\' The specified number of minimum and maximum pixel values will be rejected.
--cmax and --cmin apply to this method.
--cpos_rej --cneg_rej --citer see --cmethod=\'ksigma\'
--cmax --cmin see --cmethod=\'min_max\'
--pix_scale Change the pixel scale [arcsec]. Default of 0.2" results into cubes of 14x14pix, a scale of 0.1" results into cubes of 28x28pix, etc.
--suppress_extension If set to TRUE, the arbitrary filename extensions are supressed. If multiple products with the same category are produced, they will be numered consecutively starting from 0.
Input files:
DO KMOS
category Type Explanation Required #Frames
-------- ----- ----------- -------- -------
FLAT_SKY_FLAT F2D Flatlamp-on exposures Y 1-n
(at least 3 frames recommended)
XCAL F2D x calibration frame Y 1
YCAL F2D y calibration frame Y 1
LCAL F2D Wavelength calib. frame Y 1
WAVE_BAND F2L Table with start-/end-wavelengths Y 1
Output files:
DO KMOS category Type Explanation -------- ----- ----------- ILLUM_CORR F2I Illumination calibration frame
--imethod <str>
Method to use for interpolation: ["NN" (nearest neighbour), "lwNN" (linear weighted nearest neighbor), "swNN" (square weighted nearest neighbor), "MS" (Modified Shepard\'s method), "CS" (Cubic spline)] (str; default: \'CS\'). The full name of this option for the EsoRex configuration file is kmos.kmo_illumination_flat.imethod [default = CS].
--neighborhoodRange <float>
Defines the range to search for neighbors. in pixels (float; default: 1.001). The full name of this option for the EsoRex configuration file is kmos.kmo_illumination_flat.neighborhoodRange [default = 1.001].
--flux <bool>
TRUE: Apply flux conservation. FALSE: otherwise (bool; default: False). The full name of this option for the EsoRex configuration file is kmos.kmo_illumination_flat.flux [default = False].
--pix_scale <float>
Change the pixel scale [arcsec]. Default of 0.2" results into cubes of 14x14pix, a scale of 0.1" results into cubes of 28x28pix, etc. (float; default: 0.2). The full name of this option for the EsoRex configuration file is kmos.kmo_illumination_flat.pix_scale [default = 0.2].
--suppress_extension <bool>
Suppress arbitrary filename extension. (TRUE (apply) or FALSE (don\'t apply) (bool; default: False). The full name of this option for the EsoRex configuration file is kmos.kmo_illumination_flat.suppress_extension [default = False].
--b_samples <long>
The number of samples in wavelength for the reconstructed cube (long; default: 2048). The full name of this option for the EsoRex configuration file is kmos.kmo_illumination_flat.b_samples [default = 2048].
--b_start <float>
The lowest wavelength [um] to use when reconstructing. Derived by default, depending on the band (float; default: -1.0). The full name of this option for the EsoRex configuration file is kmos.kmo_illumination_flat.b_start [default = -1.0].
--b_end <float>
The highest wavelength [um] to use when reconstructing. Derived by default, depending on the band (float; default: -1.0). The full name of this option for the EsoRex configuration file is kmos.kmo_illumination_flat.b_end [default = -1.0].
--cmethod <str>
Apply "average", "median", "sum", "min_max." or "ksigma". (str; default: \'ksigma\'). The full name of this option for the EsoRex configuration file is kmos.kmo_illumination_flat.cmethod [default = ksigma].
--cpos_rej <float>
The positive rejection threshold for kappa-sigma-clipping (sigma). (float; default: 3.0). The full name of this option for the EsoRex configuration file is kmos.kmo_illumination_flat.cpos_rej [default = 3.0].
--cneg_rej <float>
The negative rejection threshold for kappa-sigma-clipping (sigma). (float; default: 3.0). The full name of this option for the EsoRex configuration file is kmos.kmo_illumination_flat.cneg_rej [default = 3.0].
--citer <long>
The number of iterations for kappa-sigma-clipping. (long; default: 3). The full name of this option for the EsoRex configuration file is kmos.kmo_illumination_flat.citer [default = 3].
--cmax <long>
The number of maximum pixel values to clip with min/max-clipping. (long; default: 1). The full name of this option for the EsoRex configuration file is kmos.kmo_illumination_flat.cmax [default = 1].
--cmin <long>
The number of minimum pixel values to clip with min/max-clipping. (long; default: 1). The full name of this option for the EsoRex configuration file is kmos.kmo_illumination_flat.cmin [default = 1].
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.
The full documentation for the kmos pipeline can be downloaded as a PDF file using the following URL:
ftp://ftp.eso.org/pub/dfs/pipelines/kmos/kmos-pipeline-manual-2.9.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 kmos pipeline are kmo_copy(7), kmo_fits_check(7), kmo_sci_red(7), kmo_fits_stack(7), kmo_noise_map(7), kmo_rotate(7), kmo_extract_spec(7), kmo_multi_reconstruct(7), kmo_sky_tweak(7), kmo_shift(7), kmos_gen_reflines(7), kmo_stats(7), kmo_arithmetic(7), kmos_dark(7), kmo_fits_strip(7), kmo_combine(7), kmo_std_star(7), kmo_make_image(7), kmos_flat(7), kmo_fit_profile(7), kmo_sky_mask(7), kmos_illumination(7), kmos_wave_cal(7), kmo_reconstruct(7)
kmo_illumination_flat 1.3.5
Alex Agudo Berbel <[email protected]>
Please report any problems to [email protected]. Alternatively, you may send a report to the ESO User Support Department <[email protected]>.
This file is part of the CRIRES Instrument Pipeline Copyright (C) 2002,2003 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.
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