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We investigate the optical/near-infrared light curve of the afterglow of GRB080710 in the context of rising afterglows. Optical and near-infraredphotometry was performed using the seven channel imager GROND and theTautenburg Schmidt telescope. X-ray data were provided by the X-ray Telescopeonboard the Swift satellite. The optical/NIR light curve of the afterglow ofGRB 080710 is dominated by an initial increase in brightness, which smoothlyturns over into a shallow power law decay. The initially rising achromaticlight curve of the afterglow of GRB 080710 can be accounted for with a model ofa burst viewed off-axis or a single jet in its pre deceleration phase and in anon-axis geometry. An unified picture of the afterglow light curve and promptemission properties can be obtained with an off-axis geometry, suggesting thatlate and shallow rising optical light curves of GRB afterglows might beproduced by geometric effects.

The bright optical/NIR afterglow of the faint GRB 080710 - Evidence for a jet viewed off axis