Multiwavelength view of SNR G15.4+0.1. a) A color composite image showing the new radio image at 624 MHz of G15.4+0.1 (in blue) and FIR emission as observed by Herschel at 70 μm (in red), and 250 μm (in green); b) comparison of the radio continuum emission at 624 MHz of the SNR (in blue) and the X-ray emission (in yellow) as observed by XMM-Newton in the 1−8 keV energy range. The dashed white circle indicates the size and location of the TeV source HESS J1818−154. In both panels, the yellow contours delineate the ¹³CO line emission in the 46−50.3 km s^-1 range (C13).