" T PEAK NATIONAL OBSERVATORY OPERATED BY THE ASSOCIATION OE UNIVERSITIES "FOR RESEARCH IN ASTRONOMY, INC. UNDER COOPERATIVE AGREEMENT WITH NATIONAL SCJEUQEIOUNOATION: "NEWER?"UNTVERSITIESE"5 7 7 MASSACHUSETTS INSTITUTE or TECHNOLOGY UNIVERSITY OF TEXAS AT AUSTIN CALIFORNIA INSTITUTE OF TECHNOQEt UNIVERSITY OF CALIFORNIA OHIO STATE UNIVERSITY UNIVERSITY OF CHICAGO HARVARD UNIVERSITY UNIVERSITY OF MICHIGAN INDIANA UNIVERSITY UNIVERSITY"OECOLORAUO ' .PRINCETON UNIVERSITY UNIVERSITY or NIsCONSIN YALE UNIVERSITY UNIVERSITY or ARIZONA UNIVERSITY OF UA-NAII UNIVERSITY OF ILLINOIS JOHNS HOPKINS UNIVERSITY UNIVERSITY OF MARYLAND UNIVERSITY OF WASHINGTON UNIVERSITY OF NEW YORK AT STONY BROOK UIIII'ERsITY 0F NORTNTCAROLINA IOWA sTATE UNIVERSITY PENNSYLVANIA STATE UNIVERSITY BOSTON UNIVERSITY MICHIGAN STATE UNIVERSITY