The Photometry Pipeline of the Watcher Robotic Telescope

Figure 5

The Watcher light curve of the prompt and early afterglow emission from GRB 080905B in the clear filter band with the time quoted relative to the GRB trigger time. The zero-point and limiting magnitude for every exposure are also shown. Since the value of the zero-point is related to the total number of counts per exposure time unit, its temporal evolution is correlated with the limiting magnitude evolution and the exposure time.