2004ApJ...614L..93W

We have examined the directional cross-correlation of statistical ``hot spots'' between a northern sky TeV γ-ray survey by the Milagro observatory and a similar survey by the Tibet array. We find that the directions of these hot spots are angularly uncorrelated between the two surveys for large angular separations (Δθ>4°), but there appears to be a statistically significant correlation between hot spot directions for Δθ<1°.5. Independent simulations indicate that the chance probability for the occurrence of this correlation is approximately 10^–4, implying the existence of one or more previously unobserved TeV γ-ray sources in these directions. The data sets are consistent with both pointlike sources or diffuse sources with an angular extent of 1°-2°.