ASTRO
In the literature: open
Radio detection of the predicted bulge millisecond pulsar population
In plain words
If pulsars make the excess, deep radio surveys toward the bulge should find many of them.
Precise statement
The pulsar explanation requires a bulge population whose gamma-ray luminosity function matches the excess, implying a definite number of millisecond pulsars above the flux limits of MeerKAT, FAST and SKA-Mid bulge surveys (down to $\sim 1e-5\ \mathrm{Jy}$ at 1.4 GHz). Determine the number detected and whether it agrees within a factor of 2 with the population required. Answer: yes or no with the count.
What would settle it
A completed deep radio pulsar survey of the inner bulge with modeled sensitivity, compared with the required population.