Left panel: an image from the TNG with the afterglow present. Right panel: the same region observed with HST/ACS and a zoom-in around the region of the afterglow. There is no source detected at the afterglow position itself down to a limit of F775W(AB) > 28.5. The brighter spot to the South-East in the zoomed HST image corresponds to the host candidate from the VLT mentioned in the text. A color version of the figure is available in the online version of the article.
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