The SRG/eROSITA All-Sky Survey - Optical identification and properties of galaxy clusters and groups in the western galactic hemisphere

Open Access

Fig. 9

Footprint maps for the cluster catalogs used in this work. The HEALPix resolution is NSIDE = 16 $\hat{=}$ $\[\hat{=}\]$ 13.4 deg². Black regions overlap with the LS footprint and gray regions are outside of it. White holes within the footprint indicate that the local cluster number density in a catalog is less than 1 per heal pixel.

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