Kashyap, V. (Univ. of Chicago, Chicago, IL United States)
Rosner, R. (Univ. of Chicago, Chicago, IL United States)
Harnden, F. R., Jr. (Harvard-Smithsonian Center for Astrophysics, Cambridge, MA United States)
Maggio, A. (Osservatorio Astronomico Palermo, Italy)
Micela, G. (Osservatorio Astronomico Palermo, Italy)
Sciortino, S. (Osservatorio Astronomico Palermo, Italy)