Potential bias from detecting coronal rotation from white light streamer structures. Panel a depicts the azimuthally averaged rotation profile versus latitude at the source surface (R_ss = 2.5 R_⊙) throughout the timeseries of magnetograms. Panel b charts the average brightness of scattered white light from streamers at three solar radii observed by LASCO-C2 onboard Solar and Heliospheric Observatory. Streamers are confined to the equator near minimum activity and spread to all latitude during maximum. Given that the apparent motion of white light streamers is used to measure coronal rotation, this technique may be biased towards recovering the Carrington rotation rate at most available latitudes.