Gatuzz, Efrain (Max-Planck-Inst. fuer Astrophysik Garching, Germany)
Garcia, Javier (Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Kallman, Timothy R. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Mendoza, Claudio (Instituto Venezolano de Investigaciones Cientificas Caracas, Venezuela)