Photometric identification and location of candidate blue high-mass stars within 100 pc of MCSNR J0527−7104. Left panel: B − V, V colour–magnitude diagram of stars within 100 pc of MCSNR J0527−7104, taken from the Magellanic Cloud Photometric Survey (Zaritsky et al. 2004). Also shown are stellar evolutionary tracks from Lejeune & Schaerer (2001) with, from bottom to top, the long dashed red lines showing the 5 M_⊙, 15 M_⊙, 25 M_⊙, and 60 M_⊙ tracks, and the short dashed red lines showing the 10 M_⊙, 20 M_⊙, and 40 M_⊙ tracks. The selection criteria for identification of blue high-mass stars is indicated by the dashed blue lines. Right panel: location of the candidate blue high-mass stars in relation to MCSNR J0527−7104 marked on the MCELS Hα image.