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Table 1

Number of spectra observed.

Q Class
A B C D E F Total

0 149 43 11 39 93 168 503
1 24 5 2 1 13 18 63
2 73 23 4 10 60 79 249
3 307 62 8 15 116 262 770
4 394 117 10 19 47 93 680

total 947 250 35 84 329 620 2265

eff 74.0 71.6 52.9 41.5 50.3 58.1 64.7

Notes. Class is the selection scheme used; Q is the redshift quality of the spectrum observed; “eff” is the efficiency defined as the ratio (in percent) between the number of spectra with a quality of 3 or 4 and the total.

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