First light for gamma-ray burst Chaser at La Silla

The GROND instrument installed at the MPG/ESO 2.2-metre telescope at the La Silla Observatory. GROND takes images of the same region of the sky in 7 different filters. The field of view in the near-infrared is 10 times 10 arcminutes, or 1/7th the area of the Full Moon. It is smaller in the visible, slightly above 5 x 5 arcmin. It will be mostly used to determine distances of gamma-ray bursts. Because the 2.2-m telescope already hosts FEROS and WFI, it was necessary to install GROND in a Coude-like position.