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Table 1
Number of GRBs per light curve type.
| Total | 0 | Ia | Ib | IIa | IIb | |
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| X-rays | 55 | 11 | 20 | 3 | 20 | 1 |
| Optical | 47 | 27 (8) | 13 | 4 (2) | 3 | 0 |
Notes. Numbers in parentheses are the events for that class, which displays the onset of the optical afterglow. We note that the class III defined by Margutti et al. (2013) is never seen in the complete sample.
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