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Table 1.
Breakdown of the number of galaxy groups used in this study.
| Sample | No. of GAMA |
|---|---|
| Groups | |
| Groups within XXL footprint | 238 |
| High background XXL fields excluded | 232 |
| Groups with > 50% aperture masking and poor X-ray photometry excluded | 213 |
| Groups near potential substructure excluded | 200 |
| Groups with 10.5 < log(Lopt) < 11.5 and 0.05 < z < 0.35 | 175 |
| Removal of upper limit groups from X-ray overluminous and normal subsamples (main sample used throughout) | 142 |
| Groups with 0.05 < z < 0.3 (used in Sect. 4.2) | 128 |
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