7 2009 Fermi Symposium, Washington, D.C., Nov. 2-5 Figure 5: Upper panel: Full-sky maps at energies 0.1 GeV and 32 GeV in the left and right, respectively. The maps were smoothed with a Gaussian beam with a FWHM of 5 $^{◦}$. At a single energy, a full-sky map is very smooth, nearby structures are only minimally visible. Lower panel: Ratio of the maps in the upper panel (left) and a partial map containing only nearby structures within 68 Mpc for an observed energy of 0.1 GeV (right). Creating difference maps (“color” maps) using different energy channels greatly enhances the signal of nearby structures. exception of a couple of prominent structures. The sky map in the lower left panel is the ratio of the two maps; it clearly enhances the signal of nearby structures. Convincing supporting evidence for this enhancement comes from the nearest partial map at z = 0 for E$_{γ,}$$_{0}$ = 0 . 1 GeV shown in the lower right corner of Fig. 5. Most of the prominent dark matter structures that can be seen in this map are also clearly present in the map with the energy ratio. We conclude that the γ -ray sky maps that the FERMI satellite will obtain at different energies could be used to construct difference maps which may then show enhanced cor- relations with nearby cosmic large-scale structure. eConf C091122 References E. A. Baltz and J. Edsj¨ o, PRD 59 , 023511 (1999). V. Berezinsky et al., Astroparticle Physics 5 , 333 (1996). G. Bertone and D. Merritt, Modern Physics Letters A 20 , 1021 (2005). A. Jacholkowska et al., PRD 74 , 023518 (2006). M. Wood et al., ApJ 678 , 594 (2008). F. Stoehr et al., MNRAS 345 , 1313 (2003). S. Ando et al., PRD 75 , 063519 (2007b). J. F. Navarro, C. S. Frenk, and S. D. M. White, ApJ 490 , 493 (1997). D. N´ u˜ nez et al., JCAP 5 , 3 (2008). A. Heister et al., Physics Letters B 583 , 247 (2004). T. Bringmann, L. Bergstr¨ om, and J. Edsj¨ o, Journal of High Energy Physics 1 , 49 (2008). P. Gondolo et al., New Astronomy Review 49 , 149 (2005). P. Gondolo et al., JCAP 7 , 8 (2004). M. Battaglia et al., European Physical Journal C 33 , 273 (2004). J. L. Feng, Annals of Physics 315 , 2 (2005). M. Boylan-Kolchin et al., MNRAS 398 , 1150 (2009). J. Zavala, V. Springel, and M. Boylan-Kolchin, ArXiv e-prints (2009), arXiv:0908.2428. J. M. Siegal-Gaskins and V. Pavlidou, Physical Re- view Letters 102 , 241301 (2009). S. Ando and E. Komatsu, PRD 73 , 023521 (2006). M. Jubelgas et al., A&A 481 , 33 (2008). S. Ando et al., MNRAS 376 , 1635 (2007a). W. B. Atwood et al., ApJ 697 , 1071 (2009). A. W. Strong, I. V. Moskalenko, and O. Reimer, ApJ 613 , 956 (2004). V. Springel et al., Nature 456 , 73 (2008).