Flux maps for HESS J1809−193, above a γ-ray energy of 0.27 TeV. (a) View of the entire emission of HESS J1809−193. (b) Zoom-in on core region. In both panels, light blue circles show the positions of known SNRs, the black triangle marker denotes the position of PSR J1809−1917, and the grey dashed line marks the Galactic plane. The position and extent of component A and component B of the two-component model are displayed in green and purple, respectively. The multi-wavelength data in panel (b) are from the JCMT (Castelletti et al. 2016), the FUGIN survey (Umemoto et al. 2017), the Mopra telescope (Voisin et al. 2019), and the Suzaku X-ray telescope (Anada et al. 2010). The velocity interval for the FUGIN data has been adopted from Castelletti et al. (2016). We computed the flux maps assuming a power law-type spectrum with index −2.2, and have employed a Gaussian kernel with 0.07° radius for smoothing.