Grid pattern used to re-detect SPs from J2028+28 within its HTRU-North detection beam (the centre yellow circle). One SP was observed in the grey encircled scan. The dotted blue lines represent the semi-major and minor axes of CHIME/FRB’s tied-array beam, which is larger than the plotted area, centred on their reported position of J2028+28. The black cross marks the updated position for J2028+28 with an error radius of 0.07^◦. Note that the lower scans seem to be spaced farther apart compared to the uppermost scan. This is a projection effect and is incorporated in the given error radius.