Contours of ¹²CO emission overplotted on the light echo image from HST (obtained in Sep. 2006, filter F814W). The blue contours show the ¹²CO(1–0) emission integrated in the velocity range of 52–54.5 km s^-1 (0.99, 1.35, 2.01, 3.26, and 5.66 K km s^-1), while cyan contours correspond to ¹²CO emission integrated in the range 47–51 km s^-1 (1.19, 1.34, 1.57, 1.75, 2.07, 2.40, and 2.87 K km s^-1). The red contours show emission in the ¹²CO(3–2) line integrated over 52–54.5 km s^-1 (0.31, 0.51, 1.07, 2.10, and 3.88 K km s^-1). The position of V838 Mon is indicated by the star. The green “+” symbols mark positions with detected emission in the ¹²CO(2–1) line in the IRAM single position observations (Off3, Off7, and Off8, as in Kamiński 2008). The “ × ” symbols mark positions with the strongest emission from the ¹²CO(1–0) line (blue, P10) and ¹²CO(3–2) line (red, P32) integrated in the 52–54.5 km s^-1 range.