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Fig. 3
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HEALPix masks with growing fsky (Nside = 32): 85% (dark blue), 90% (light blue), 92% (green), 95% (orange), and 97.3% (brown). The 97.3% mask additionally excludes the inner Galactic plane within 3 degrees of latitude and pixels within 4 degrees of the Crab pulsar (gray).
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