Skymap from narrow posterior samples gives `nan` PROBDENSITY
In some cases, multiorder skymaps from narrow-sky samples contain nans only.
In the MWE notebook a set of gaussian samples tightly clustered in 0.01 deg² of the sky is used (and attached here).
gaussian_samples.dat
I suspect there is something wrong in my usage of either ligo.skymap.kde.Clustered2DSkyKDE or its .as_healpix() export method.
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