Measuring the bar length from photometric analysis. Left panel: Contours of constant surface brightness at t = 1.95 Gyr. The blue and the maroon circles denote the extents of a_ε and L_bar, respectively. Middle panel: Radial profiles of the ellipticity (ε = 1 − b/a), where a and b are semi-major and semi-minor axes. The vertical blue dashed line denotes the radial location of a_ε. Right panel: Radial profiles of the position angle (PA). The vertical maroon dashed line denotes the radial location of L_bar. Here, 1 arcsec = 1 kpc. The radial profile of ellipticity shows a clear peak, and the PA remains almost constant within the bar extent.