Provided by: cpl-plugin-muse-doc_2.8.5+dfsg-1_all 
NAME
muse_astrometry - Compute an astrometric solution.
SYNOPSIS
esorex muse_astrometry [OPTIONS] FILE.sof
DESCRIPTION
Merge pixel tables from all IFUs, apply correction for differential atmospheric refraction
(when necessary), optionally apply flux calibration and telluric correction (if the
necessary input data was given), and resample the data from all exposures into a datacube.
Use the cube to detect objects which are then matched to their reference positions from
which a two-dimensional WCS solution is computed. There are two pattern matching algorithm
implemented, which can be selected by chosing a positive or zero value of faccuracy. In
the first method (with a positive value of faccuracy), start using the search radius, and
iteratively decrease it, until no duplicate detections are identified any more. Similarly,
iterate the data accuracy (decrease it downwards from the mean positioning error) until
matches are found. Remove the remaining unidentified objects. The second method (when
faccuracy is set to zero), iterates through all quadruples in both the detected objects
and the catalogue, calculates the transformation and checks whether more than 80% of the
detections match a catalog entry within the radius. The main output is the ASTROMETRY_WCS
file which is a bare FITS header containing the world coordinate solution. The secondary
product is DATACUBE_ASTROMETRY, it is not needed for further processing but can be used
for verification and debugging. It contains the reconstructed cube and two images created
from it in further FITS extensions: a white-light image and the special image created from
the central planes of the cube used to detect and centroid the stars (as well as its
variance).
OPTIONS
--centroid <str>
Centroiding method to use for objects in the field of view. "gaussian" and "moffat"
use 2D fits to derive the centroid, "box" is a simple centroid in a square box.
(str; default: ´moffat´). The full name of this option for the EsoRex configuration
file is muse.muse_astrometry.centroid [default = moffat].
--detsigma <float>
Source detection sigma level to use. If this is negative, values between its
absolute and 1.0 are tested with a stepsize of 0.1, to find an optimal solution.
(float; default: 1.5). The full name of this option for the EsoRex configuration
file is muse.muse_astrometry.detsigma [default = 1.5].
--radius <float>
Initial radius in pixels for pattern matching identification in the astrometric
field. (float; default: 3.0). The full name of this option for the EsoRex
configuration file is muse.muse_astrometry.radius [default = 3.0].
--faccuracy <float>
Factor of initial accuracy relative to mean positional accuracy of the measured
positions to use for pattern matching. If this is set to zero, use the quadruples
based method. (float; default: 0.0). The full name of this option for the EsoRex
configuration file is muse.muse_astrometry.faccuracy [default = 0.0].
--niter <int>
Number of iterations of the astrometric fit. (int; default: 2). The full name of
this option for the EsoRex configuration file is muse.muse_astrometry.niter
[default = 2].
--rejsigma <float>
Rejection sigma level of the astrometric fit. (float; default: 3.0). The full name
of this option for the EsoRex configuration file is muse.muse_astrometry.rejsigma
[default = 3.0].
--rotcenter <str>
Center of rotation of the instrument, given as two comma-separated floating point
values in pixels. (str; default: ´-0.01,-1.20´). The full name of this option for
the EsoRex configuration file is muse.muse_astrometry.rotcenter [default =
-0.01,-1.20].
--lambdamin <float>
Cut off the data below this wavelength after loading the pixel table(s). (float;
default: 4000.0). The full name of this option for the EsoRex configuration file is
muse.muse_astrometry.lambdamin [default = 4000.0].
--lambdamax <float>
Cut off the data above this wavelength after loading the pixel table(s). (float;
default: 10000.0). The full name of this option for the EsoRex configuration file
is muse.muse_astrometry.lambdamax [default = 10000.0].
--lambdaref <float>
Reference wavelength used for correction of differential atmospheric refraction.
The R-band (peak wavelength ~7000 Angstrom) that is usually used for guiding, is
close to the central wavelength of MUSE, so a value of 7000.0 Angstrom should be
used if nothing else is known. A value less than zero switches DAR correction off.
(float; default: 7000.0). The full name of this option for the EsoRex configuration
file is muse.muse_astrometry.lambdaref [default = 7000.0].
--darcheck <str>
Carry out a check of the theoretical DAR correction using source centroiding. If
"correct" it will also apply an empirical correction. (str; default: ´none´). The
full name of this option for the EsoRex configuration file is
muse.muse_astrometry.darcheck [default = none].
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 muse pipeline can be downloaded as a PDF file using the
following URL:
ftp://ftp.eso.org/pub/dfs/pipelines/muse/muse-pipeline-cookbook-2.8.5.pdf
An overview over the existing ESO pipelines can be found on the web page
https://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
https://packages.python.org/python-cpl/index.html for further information.
The other recipes of the muse pipeline are muse_ampl(7), muse_bias(7), muse_create_sky(7),
muse_dark(7), muse_exp_align(7), muse_exp_combine(7), muse_flat(7), muse_geometry(7),
muse_illum(7), muse_lingain(7), muse_lsf(7), muse_qi_mask(7), muse_scibasic(7),
muse_scipost(7), muse_scipost_apply_astrometry(7), muse_scipost_calibrate_flux(7),
muse_scipost_combine_pixtables(7), muse_scipost_correct_dar(7),
muse_scipost_correct_rv(7), muse_scipost_make_cube(7), muse_scipost_raman(7),
muse_scipost_subtract_sky(7), muse_scipost_subtract_sky_simple(7), muse_standard(7),
muse_twilight(7), muse_wavecal(7)
VERSION
muse_astrometry 2.8.5
AUTHOR
Peter Weilbacher <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 part of the MUSE Instrument Pipeline Copyright (C) 2005, 2019 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 02111-1307 USA