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Table 1.
Number of galaxy pairs in each sample included in the SDSS-DR7 area and in the CS82 masked area.
| Selection criteria | SDSS-DR7 | CS82 |
|---|---|---|
| Total sample | 1911 | 388 |
| Noninteracting | 702 | 176 |
| Interacting pairs | 1209 | 212 |
| Red pairs | 922 | 181 |
| Blue pairs | 989 | 207 |
| Higher-luminosity pairs | 1217 | 194 |
| Lower-luminosity pairs | 694 | 194 |
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