2004/08/31 by Gary Walker, G. Walker, R. Atkins +1 · 1 citation
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Dark Matter and Cosmic Phenomena #Particle physics theoretical and experimental studies #astro-ph
paper · pdf · doi:10.1086/425863
published as Astrophys.J. 614 (2004) L93-L96 · 12 pages, 2 figures, 3 tables. Submitted to Astrophysical Journal Letters
arxiv created 2004/08/31 · openalex publication_date 2004/09/28 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/31
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°.