Representing the "butterfly" projection in FITS - projection code XPH
The "butterfly" projection is constructed as the polar layout of the HEALPix projection with (H,K) = (4,3). This short article formalises its representation in FITS.
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Publications and source records attributed to Stuart R. Lowe.
The "butterfly" projection is constructed as the polar layout of the HEALPix projection with (H,K) = (4,3). This short article formalises its representation in FITS.