20071218

Very bad weather conditions. Moon and high altitude clouds make this night very poor. So I try to follow bright GR Tau again to catch some B-I data. Since the source and comparisons are very bright I can perform quite high speed (ha ha) photometry (5sI,10sB exps.) which can be interesting at secondary minimum phase where some asymmetry is observed. Asymmetry profile is wave length dependent so blue and infra filters here...