Moving average profile of GC late-type stars along Galactic longitude, centred on Sgr A^★. Red lines denote the average over the entire FOV, and blue dashed lines for stars at b<1 pc, meaning without stars located in the northern region of the FOV. The average is computed on 200 stars, uncertainties are Poisson errors. Top panel: Observed K_S band photometry; Second panel: Extinction-corrected K_S,0 photometry; Third panel: Extinction in the K_S band A_K; Bottom panel: Observed colour H − K_S . Vertical dashed lines denote the NSC R_e =5 pc, and the centre at 0 pc.