Jansky Very Large Array continuum map of the W51 region at 14.5 GHz (image taken from Ginsburg et al. 2016; synthesized beam size: 0.″). W51d is associated with the northwestern hotspot, W51-IRS2, while the more extended bright region to the southeast is W51-IRS1. Our Effelsberg beam size of ≈40″ (the inner circle) encompasses the entire IRS2 region, but is small enough to exclude IRS1. The slightly larger circle, corresponding to 55″, refers to the beam size of the Tian Ma Radio telescope near Shanghai.