short term variability

Forums General Discussion Whatever happened to Megrez? short term variability

Robin Leadbeater

B,V Ic correspond to the band in which the brightness was measured. (The survey instrument uses a CCD camera and wide field lens).  V corresponds roughly to what the eye sees Ic is the near infrared. There are small long term average trends from season to season but the  variation from day to day/week to week of up to 0.5 magnitudes seen in the V data would be  obvious by eye if real. The very tight error bars on the points would suggest they are real but I am somewhat sceptical.