Figure 1: from Hinton & Aharonian's invited article:
of the Galactic Centre region derived from the 2004 dataset of
H.E.S.S.. White crosses show the tracking positions used. G 0.9+0.1
is shown as a triangle and Sgr A* as a star. The two circles
show the integration radius used in the calculation of significance.
Galactic coordinates are used.
(See Article by J. Hinton & F. Aharonian).