Koen, Chris2013-11-032013-11-032008Koen, C. (2008). Multicolour time series photometry of 2MASS 1207−3932. Monthly Notices of the Royal Astronomical Society, 389: 949–9540035-8711http://hdl.handle.net/10566/795Time series photometry in VRI of the young brown dwarf Two-Micron All-Sky Survey (2MASS) J1207334−393254 is presented. Variability in I is insignificant, but amplitudes up to ∼0.2 mag in R, and ∼0.55 mag in V, are seen within a single night. There is also microvariability on time-scales of an hour or so, which appears to be present in data from all the three filters. There may be a non-sinusoidal periodicity of about half a day in the V and R data. A likely explanation for the variability is the presence of accretion hot spots.en© 2008 copyright Oxford University Press. This file may be freely used for educational purposes, as long as it is not altered in any way. Acknowledgement of the authors and the source is required.Stars: individual: 2MASS J1207334−393254Stars: low-mass, brown dwarfsStars: spotsStars: variables: otherArticle