Recent GRBs Observed with the 1.23 m CAHA Telescope and the Status of Its Upgrade

Figure 4

Flow diagram of the GCN network and the response mode of the 1.23 m telescope. The whole process can take up to 4 minutes, depending on the position of the GRB on sky. The time needed to receive the coordinates from the high-energy satellite in the RTS2 server takes just a few seconds (usually less than 15 seconds). Currently most of the delay is due to the slow pointing of the 1.23 m, which could take up to 4 minutes in the worst case.