The graph below shows the attempt to detect rapid fluctuations for V455 And.  10 sec integration times were used, and the images were binned (2x2) on chip.  This resulted in about a 13 sec cycle time.  The photometry apertures were correspondingly made smaller.  Notice that V455 And (bottom curve) is doing some rapid fluctions that aren't seen in the comparison stars.

Below is an expanded time axis for the same data.  Notice that there is some semblance of a rapid period fluctuation in the data for V455 And on  the order of 1 cycle/min.  I tried Peranso for the first time and could see frequency components at about 1/minute and 2/minute.  The data for 2.5 hours is linked here.  Donald F. Collins

V455 And Sept. 18-19 (JD 2454362.56)

20 cm telescope, 20 sec integrations; un-filtered.  Clouds at the large error bars.  Don Collins