SED of the tail-like PWN of J1740, including the X-ray points derived in this work and the LHAASO-KM2A spectrum along with the LHAASO-WCDA extrapolation of LHAASO Collaboration (2025). The electron distribution is modelled as an ECPL with fixed p = 1.6, β = 2, E₀ = 1 TeV and free E_cut and normalisation. We included ICS, considering all the photon fields obtained from Popescu et al. (2017), and Synchrotron, where the magnetic field value was left free to vary. We also report the VERITAS upper limit of Benbow et al. (2021) obtained for an extraction region of 0.1°. The model residuals, obtained as (data - model)∕error, are shown in the bottom panel.