Fermi-LAT deviation probability map, or PS map, of the W44 surroundings with the best model obtained from the likelihood analysis. The white contours represent the W 44 radio template adopted in the analysis, derived from the template reported in Fig. 1e). The red crosses and circles show the new point-like and extended sources we added and fit in this analysis, and the black crosses and circles correspond to sources in the 4FGL-DR2 Fermi-LAT catalog for which the morphology was not changed. The radii of the circles represent the r₆₈ of the extended sources that were modeled with a disk shape.