5σ mass sensitivity to companions in the HD 135344B system achieved by the ASDI/IFS reduction. As in Fig. 3, AMES-DUSTY initial conditions are assumed for the perturber’s luminosity, and the 2D map was deprojected based on the disk parameters listed in Table 1. Disk residuals caused by the spiral pattern are clearly seen. The black dashed circumference shows the location of the cavity in scattered light as observed by SPHERE/PDI (Stolker et al. 2016). The inner red thick circumference shows the proposed location of a perturber in the middle of the cavity, very close to the coronagraphic mask, and the outer circumference represents the proposed location of a 5–10 M_Jup companion creating the spirals (Dong & Fung 2017a).