measure_radial¶

poppy.measure_radial(HDUlist_or_filename=None, ext=0, center=None, binsize=None)[source]¶

measure azimuthally averaged radial profile of a PSF.

Returns a function object which when called returns the mean value at a given radius.

HDUlist_or_filename : string: what it sounds like.
ext : int: Extension in FITS file
center : tuple of floats: Coordinates (x,y) of PSF center. Default is image center.
binsize:: size of step for profile. Default is pixel size.

radial_profile: function: A function which will return the mean PSF value at any desired radius.

>>> rp = measure_radial("someimage.fits")
>>> radius = np.linspace(0, 5.0, 100)
>>> plot(radius, rp(radius), label="PSF")