Figure 6: The picture shows the coadded -band image taken for GRB 090621B with the 1.23 m telescope of Calar Alto. The faintest of the two objects (the most upper one indicated with tick marks) represents the candidate reported in [14]. Approximately towards the Southwest, it is marked the candidate reported by [15], brighter than the one of [14]. The cyan circles show the USNO-A2 catalogue stars used for the astrometric and photometric calibrations. The field of view of the image is , with North up and East left.