GROND z′-band image from the first 10 min OB from the first night (top left; mid-time 2014-07-10T23:09), the stack of two 30 min OBs from the next night (top right’ mid-time 2014-07-12T01:13), and the GROND light curve with a best-fit slope of 1.2±0.1 (bottom). The 1.​​′7 INTEGRAL error circle is outside this figure, but the combined evidence of clear fading and typical power-law SED identifies this source without doubt as the afterglow of GRB 140710B.