write.kinmap: Function to write a kinematic map to a fits file
In oczoske/slacR: R-package to measure v and sigma from VIMOS IFU cubes

Description Usage Arguments Details Value Author(s) See Also

The function uses write.fits to write one or more components of the kinematic maps to fits files. A WCS is created if its reference point is defined through function arguments. If a configuration is given, details on the object and the template are also written to the fits header.

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write.kinmap(x, component, outfile, na.val = 0, overwrite = FALSE,
             configuration = NULL, crval1 = NULL, crval2 = NULL,
             crpix1 = NULL, crpix2 = NULL)

`x`	A kinematic map as created by `fit.cube`. More generally, a data frame with at least the `component` to be written, and coordinate vectors `x$L` and `x$M`.
`component`	One or more components of the kinematic map `x` for which fits files are to be written. If more than one, these are to be given as a vector of character strings.
`outfile`	The name(s) of one or more fits files that are to be created. The order corresponds to that of `component`. If the lengths of `component` and `outfile` are not the same, files are written, until one of the vectors is exhausted.
`na.val`	Numerical value to replace `NA` in the data.
`overwrite`	If `TRUE`, an existing file will be overwritten.
`configuration`	A `list` of configuration details on the object or the name of a configuration file. Currently the components `object`, `data.cube`, `noise.cube` and `template.file` are written to the fits header.
`crval1, crval2`	The world coordinates of the reference point.
`crpix1, crpix2`	The physical coordinates, i.e.~`x$L` and `x$M`, of the reference point.

The function rotates the kinematic map so that north is along the positive y axis and east along the negative x axis in the fits file. NOTE THAT THIS MIGHT CHANGE AGAIN!

A WCS is created if the coordinates of the reference point are explicitely given. The linear matrix is implicitely assumed and correponds to that of VIMOS data reduced with VIPGI. This means that x$L increases in the north direction and x$M increases in the east direction. The pixel scale is 0.67 arcsec.

The physical coordinates x$L and x$M are in principle preserved using the keywords LTM1 and LTM2 in the fits header. They are, however, interchanged. Matching the kinematic maps to the 2D image reconstruction therefore needs a rotation.

None.

Oliver Czoske

write.fits, fit.cube

oczoske/slacR documentation built on May 20, 2019, 8:23 p.m.