STUDY OF MUONS FROM THE DIRECTION OF CYGNUS-X-3 USING AN UNDERGROUND PROPORTIONAL-TUBE ARRAY by Kochocki, J, Allison, W, Alner, G, Ambats, I, Ayres, D, Balka, L, Barr, G, Barrett, W, Benjamin, D, Border, P, Brooks, C, Cobb, J, Cockerill, D, Coover, K, Courant, H, Dahlin, B, Dasgupta, U, Dawson, J, Edwards, V, Fields, T, Kirbygallagher, L, Garciagarcia, C, Giles, R, Goodman, M, Heller, K