- Upsdell, EW;
- Giles, PA;
- Romer, AK;
- Wilkinson, R;
- Turner, DJ;
- Hilton, M;
- Rykoff, E;
- Farahi, A;
- Bhargava, S;
- Jeltema, T;
- Klein, M;
- Bermeo, A;
- Collins, CA;
- Ebrahimpour, L;
- Hollowood, D;
- Mann, RG;
- Manolopoulou, M;
- Miller, CJ;
- Rooney, PJ;
- Sahlén, Martin;
- Stott, JP;
- Viana, PTP;
- Allam, S;
- Alves, O;
- Bacon, D;
- Bertin, E;
- Bocquet, S;
- Brooks, D;
- Burke, DL;
- Kind, M Carrasco;
- Carretero, J;
- Costanzi, M;
- da Costa, LN;
- Pereira, MES;
- De Vicente, J;
- Desai, S;
- Diehl, HT;
- Dietrich, JP;
- Everett, S;
- Ferrero, I;
- Frieman, J;
- García-Bellido, J;
- Gerdes, DW;
- Gutierrez, G;
- Hinton, SR;
- Honscheid, K;
- James, DJ;
- Kuehn, K;
- Kuropatkin, N;
- Lima, M;
- Marshall, JL;
- Mena-Fernández, J;
- Menanteau, F;
- Miquel, R;
- Mohr, JJ;
- Ogando, RLC;
- Pieres, A;
- Raveri, M;
- Rodriguez-Monroy, M;
- Sanchez, E;
- Scarpine, V;
- Sevilla-Noarbe, I;
- Smith, M;
- Suchyta, E;
- Swanson, MEC;
- Tarle, G;
- To, C;
- Weaverdyck, N;
- Weller, J;
- Wiseman, P
We cross-match and compare characteristics of galaxy clusters identified in observations from two sky surveys using two completely different techniques. One sample is optically selected from the analysis of 3 years of Dark Energy Survey observations using the redMaPPer cluster detection algorithm. The second is X-ray selected from XMM observations analysed by the XMM Cluster Survey. The samples comprise a total area of 57.4 deg2, bounded by the area of four contiguous XMM survey regions that overlap the DES footprint. We find that the X-ray-selected sample is fully matched with entries in the redMaPPer catalogue, above λ > 20 and within 0.1