Left: difference between speckle magnitude difference and Gaia magnitude difference as function of seeing times separation. This difference between the speckle and Gaia magnitude differences should be ∼0 for small values of seeing times separation, and should increase as seeing times separation increases. This is the trend we see in our data. Right: Gaia magnitude difference vs. speckle magnitude difference for the observations where seeing times separation is <0.6 arcsec². The correlation is fairly good, although it does appear that there is a systematic offset from an equivalent relation (dashed orange line).