Dust extinction map of the B59 region at a spatial resolution of 20″ (Román-Zúñiga et al. 2010). The solid white line contours represent levels of visual extinction at A_V = [5, 7, 10, 15, 20, 25, 30, 35, 40, 50, 60, 70, 80, 90] mag. The yellow square marks the filament studied in this work. Two yellow stars indicate the approximate length of the filament. The scale bar is at the bottom right side of the panel.