We had the second detection of a gamma-ray burst (GRB 090926B) with GSC. The raw light curve (not corrected for collimator response) and the raw source image is shown below. An interesting point is that the detection by MAXI is 17 seconds earlier than the Swift trigger, and the transit duration (~30 s) is shorter than normal (40-60 s for a steady source). Probably the GRB started in the middle of the transit, and the tail of the burst is truncated at the end of the transit. Therefore, the light curve and the source image are complicated products of triangular collimator response and the GRB time profile. (Link to the GCN Circular)
