Morphological substructures in PLCKG287 from filtered Chandra images. Left panel: residual Chandra image of the central cluster region obtained by subtracting the best-fit elliptical β-model (see Table 2). As is indicated by the color bar, the positive and negative residuals are shown in red and blue, respectively. Right panel: unsharp masked image obtained by subtracting a 40″-smoothed image from a 5″-smoothed one. The dashed green ellipses show the possible X-ray depressions discussed in Sect. 5.4, whereas the red arc indicates the position of the identified shock front (see Sect. 4). Overlaid are the GMRT radio contours at 330 MHz (same as in Fig. 2). In both panels, the black and magenta crosses indicate the location of the X-ray peak (RA 11:50:49.4, Dec −28:04:44.3) and main BCG (RA 11:50:50.2, Dec −28:04:55.7), respectively.