Top panel: map of excess TS in the inner region of the ROI centered on PKS 1258−321, after removing the unidentified catalog source 3FGL J1259.5−3231 from the model. Bottom panel: residual excess TS map after modeling and localizing the new source PS J1259.7−3223. Both panels: The cyan cross represents the radio position of PKS 1258−321. The yellow cross represents the position of NVSS J125949−322329. The yellow ellipses represent the 68% and 95% positional uncertainties from the catalog for 3FGL J1259.5−3231. The cyan circles represent the 68% and 95% positional uncertainties for the new source PS J1259.7−3223. The map radius is 0.8°. Each pixel corresponds to 0.1°.