Infrared images of the surrounding environment of VVV-WIT-13 (located in the centre and marked by the green circle in all frames). Left:Spitzer IRAC three-colour image (1 × 1 deg, blue: [4.5], green: [5.8], red: [8.0]), taken in 2004 during the pre-outburst stage, with Galactic longitude (l) and latitude (b). Sources belonging to the G342.1+0.2 YSO group, selected by SPICY, are marked by magenta circles. Upper right: Zoomed-in 5′ × 5′ Spitzer IRAC three-colour image, with the equatorial north-up orientation. Middle and bottom right: 1.2′ × 1.2′ W2-band images from unWISE (Lang 2014; Meisner et al. 2017), taken in 2017 and 2020.