ism3d.xyhelper.maskmoment.momfuncs.calc_moments

ism3d.xyhelper.maskmoment.momfuncs.calc_moments(imcube, rmscube, mask=None)

Calculate moments of a masked cube and their errors

Parameters

• imcube (SpectralCube) – The image cube for which to calculate the moments and their errors.

• rmscube (SpectralCube) – A cube representing the noise estimate at each location in the image cube. Should have the same units as the image cube.

• mask (~numpy.ndarray) – A binary mask array (0s and 1s) to be applied before measuring the flux and uncertainty. This should NOT be a SpectralCube.

Returns

• altmom (~numpy.ndarray) – A stack of the three moment maps. These are generally redundant since they were previously calculated by SpectralCube.

• errmom (~numpy.ndarray) – A stack of the three uncertainty maps.