
Contours of the Cash statistic for model Gaussian profile
and Simulated profile.
1000 cts/s/SC, widths=[0.1,0.1], SIM_XY=[31,31]
Note that the Chisquare statistic (dotted) has multiple extrema,
displaced from the Cash statistic minimum. This is typical behavior
for count rates of this order. The 0.5,0.5 arcsec displacement of the
Cash statistic minimum from (0,0) may be due to pixelization in the
source simulation (hsi_image), although one of the signs appears to be
wrong.
