Coordinates Module (cwitools.coordinates)

The coordinates module contains commonly-used functions relating to coordinate systems and FITS Headers (e.g. obtain the wavelength axis from a 3D header).

Tools for working with headers and world coordinate systems.

Functions

get_flam2sb(header)	Get the conversion factor from FLAM units to surface brightness.
get_header1d(header3d)	Remove the spatial axes from a a 3D FITS Header.
get_header2d(header3d)	Remove the spectral axis from a 3D FITS Header
get_indices(wav1, wav2, header[, bounded])	Returns wavelength layer indices for two given wavelengths in Angstrom.
get_kpc_per_px(header[, redshift, unit, …])	Return the physical size of pixels in proper kpc.
get_pxarea_arcsec(header)	Get the pixel area in arcsec2.
get_pxsize_angstrom(header)	Get the pixel/wavelenght-layer size in units of Angstrom.
get_rgrid(fits_in, pos[, unit, redshift, …])	Get a 2D grid of radius from x,y in specified units.
get_wav_axis(header)	Returns a NumPy array representing the wavelength axis of a cube.
reproject_hdu(hdu1, header[, method])	Reproject the WCS and data of one HDU to match another using ‘Reproject’.
scale_hdu(hdu, upscale[, header_only, …])	Scale the data and/or header in an HDU up by a factor.