cwitools.synthesis.obj_moments¶

cwitools.synthesis.obj_moments(fits_in, obj_cube, obj_id, var_cube=None, unit='kms')¶

Creates 2D maps of 1st and 2nd z-moments for 3D objects.

Input can be ~astropy.io.fits.HDUList, ~astropy.io.fits.PrimaryHDU or ~astropy.io.fits.ImageHDU. If HDUList given, PrimaryHDU will be used.

Returned objects will be of same type as input.

Parameters:	fits_in (astropy HDU or HDUList) – Input HDU/HDUList with 3D data. obj_cube (NumPy.ndarray) – Data cube containing labelled 3D regions. obj_id (list or int) – ID or list of IDs of objects to include. var_cube (NumPy.ndarray) – Data cube containing 3D variance estimate. unit (str) – Desired output unit. ‘kms’ - kilometers per second ‘wav’ - wavelength units (same as input z-axis)
Returns:	First moment (velocity) map, with header HDU / HDUList: Error on first moment map, with header HDU / HDUList: Second moment (dispersion) map, with header HDU / HDUList: Error on second moment map, with header Return type matches fits_in.
Return type:	HDU / HDUList*

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