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We present photometric and spectroscopic observations of the late afterglowof GRB 000911, starting ~1 day after the burst event and lasting ~8 weeks. Wedetect a moderately significant re-brightening in the R, I and J lightcurves,associated with a sizable reddening of the spectrum. This can be explainedthrough the presence of an underlying supernova, outshining the afterglow ~30days after the burst event. Alternative explanations are discussed.Comment: 7 pages, 3 postscript figures, A&A in pres

The optical afterglow of GRB 000911: Evidence for an associated supernova?