Test statistic (TS) maps in the 0.75–3 MeV (a) and 3–30 MeV (b) energy bands. The significance, expressed in Gaussian sigma, corresponds to $\sqrt{\mathrm{T}\mathrm{S}}$, where negative TS values correspond to model fits that resulted in negative source flux. The contours indicate the pre-trial detection significance in Gaussian sigma, with contours spaced by 1σ and the first contour starting at 3σ. The filled circles in the lower-left corners of the maps indicate the 68% containment region of the COMPTEL point spread function.