Evidence of Rapid Optical Variability In Selected Narrow-Line Seyfert 1   Galaxies
  We present the first results of a search for the presence of rapid optical variability in a sample of five Narrow-Line Seyfert 1 galaxies. We find clear evidence of rapid variability for IRAS 13224-3809 with variations occurring on time scales of an hour. However, the results are less conclusive for the other four sources in our sample, Markarian 766, PG 1244+026, PG 1404+226 and Arakelian 564. While there are several instances among these latter objects where there is a hint that variability may be present, IRAS 13224-3809 provides the only conclusive evidence of rapid optical variability detected to date. 
H.R. Miller (1), E.C. Ferrara (1), J.P. McFarland (1), J.W. Wilson   (1), A.B. Daya(1) and R.E. Fried(2) ((1) Georgia State ...