muse_exp_align7

Usage

Overview

Compute the coordinate offset for each input field-of-view image with respect to a reference. The created list of coordinate offsets can then be used in muse_exp_combine as the field coordinate offsets to properly align the exposures during their combination. The source positions used to compute the field offsets are obtained by detecting point sources in each of the input images, unless the source detection is overridden and an input source list is available for each input field-of-view image. In this latter case the input source positions are used to calculate the field offsets.

Options

--rsearch <str>

Search radius (in arcsec) for each iteration of the offset computation. (str; default: ´30.,4.,2.,0.8´). The full name of this option for the EsoRex configuration file is muse.muse_exp_align.rsearch [default = 30.,4.,2.,0.8].

--nbins <int>

Number of bins to use for 2D histogram on the first iteration of the offset computation. (int; default: 60). The full name of this option for the EsoRex configuration file is muse.muse_exp_align.nbins [default = 60].

--weight <bool>

Use weighting. (bool; default: True). The full name of this option for the EsoRex configuration file is muse.muse_exp_align.weight [default = True].

--fwhm <float>

FWHM in pixels of the convolution filter. (float; default: 5.0). The full name of this option for the EsoRex configuration file is muse.muse_exp_align.fwhm [default = 5.0].

--threshold <float>

Initial intensity threshold for detecting point sources. If the value is negative or zero the threshold is taken as sigma above median background MAD. If it is larger than zero the threshold is taken as absolute background level. (float; default: 15.0). The full name of this option for the EsoRex configuration file is muse.muse_exp_align.threshold [default = 15.0].

--bkgignore <float>

Fraction of the image to be ignored. (float; default: 0.05). The full name of this option for the EsoRex configuration file is muse.muse_exp_align.bkgignore [default = 0.05].

--bkgfraction <float>

Fraction of the image (without the ignored part) to be considered as background. (float; default: 0.1). The full name of this option for the EsoRex configuration file is muse.muse_exp_align.bkgfraction [default = 0.1].

--step <float>

Increment/decrement of the threshold value in subsequent iterations. (float; default: 0.5). The full name of this option for the EsoRex configuration file is muse.muse_exp_align.step [default = 0.5].

--iterations <int>

Maximum number of iterations used for detecting sources. (int; default: 100000). The full name of this option for the EsoRex configuration file is muse.muse_exp_align.iterations [default = 100000].

--srcmin <int>

Minimum number of sources which must be found. (int; default: 5). The full name of this option for the EsoRex configuration file is muse.muse_exp_align.srcmin [default = 5].

--srcmax <int>

Maximum number of sources which may be found. (int; default: 80). The full name of this option for the EsoRex configuration file is muse.muse_exp_align.srcmax [default = 80].

--roundmin <float>

Lower limit of the allowed point-source roundness. (float; default: -1.0). The full name of this option for the EsoRex configuration file is muse.muse_exp_align.roundmin [default = -1.0].

--roundmax <float>

Upper limit of the allowed point-source roundness. (float; default: 1.0). The full name of this option for the EsoRex configuration file is muse.muse_exp_align.roundmax [default = 1.0].

--sharpmin <float>

Lower limit of the allowed point-source sharpness. (float; default: 0.2). The full name of this option for the EsoRex configuration file is muse.muse_exp_align.sharpmin [default = 0.2].

--sharpmax <float>

Upper limit of the allowed point-source sharpness. (float; default: 1.0). The full name of this option for the EsoRex configuration file is muse.muse_exp_align.sharpmax [default = 1.0].

--expmap <bool>

Enables the creation of a simple exposure map for the combined field- of-view. (bool; default: False). The full name of this option for the EsoRex configuration file is muse.muse_exp_align.expmap [default = False].

--bpixdistance <float>

Minimum allowed distance of a source to the closest bad pixel in pixel. Detected sources which are closer to a bad pixel are not taken into account when computing the field offsets. This option has no effect if the source positions are taken from input catalogs. (float; default: 5.0). The full name of this option for the EsoRex configuration file is muse.muse_exp_align.bpixdistance [default = 5.0].

--override_detection <bool>

Overrides the source detection step. If this is enabled and source catalogs are present in the input data set, the source positions used to calculate the field offsets are read from the input catalogs. If no catalogs are available as input data the source positions are detected on the input images. (bool; default: False). The full name of this option for the EsoRex configuration file is muse.muse_exp_align.override_detection [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.

Version

muse_exp_align 2.8.7