Table 6
Preliminary classification of the sample based on the i′ − z′ and z′ − J colours.
| Object type | Number | Percentage | Distance |
|
|
|||
| late T dwarfs | 13 | 5% | 60 pc |
| early T dwarfs | 28 | 11% | 100 pc |
| late L dwarfs | 61 | 25% | 200 pc |
| < M 8 dwarfs | 77 | 31% | 500 pc |
| artefacts and quasars candidates | 70 | 28% | |
| total | 249 | ||
Notes. The spectral class definitions are given in Table 3. Note that we expect most contamination to occur in the late L class from the M8 to early L class. The limiting distance of detection is also given.
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