Left: three colour MSX (Price et al. 2001) IR image of the radio arc bubble (bands C, D, and E). Red contours overlaid show the confidence-level contours at 68%, 95%, and 99% on the best fit position of the new detected source HESS J1746−285 derived from the TS map of the fitted position; white contours show the radio arc emission at 90 cm. TheQuintuplet cluster is the bright source on the top left part of the bubble. Right: Chandra 2−10 keV mosaic image of the field surrounding G0.13−0.11 using all available public data. The image is exposure-corrected and smoothed with a Gaussian with a width of σ = 2.5^″ to highlight the filamentary emission. Green contours show the HCN emission of the molecular cloud G0.11−0.11 integrated inthe range 10−30 km s⁻¹ (following Tsuboi et al. 2011).