Top: central region of the ¹³CO 6–5 map covering IRAS 4A. The broad component has been removed from the entire map. The red lines indicate the envelope model emission. Middle: integrated intensity map of the narrow ¹³CO 6–5 emission, obtained by removing the broad component. The white square box indicates the region covered in the top figure. This map shows both the envelope and UV-heated gas. Bottom: ¹³CO map obtained after subtracting the model ¹³CO 6–5 envelope emission convolved to the APEX beam from the above map. White circles show the limits of the 10 K radius envelope and white cones show the direction of the outflows. This map represents the UV-heated gas only.