For those who are going to detect short-term variablilty, it may be useful to use short integration times, as short as 10 sec when possible. Our previous analysis of the VSNET collaboration data (of earlier moments) has yielded "white-noise-like" variation to the limit of our time resolution. Regards, Taichi Kato, Makoto Uemura, on behalf of the VSNET XTE J1118+480 collaboration team