Browsing by Subject "Stars: spots"

Now showing items 1-2 of 2

    • Fitting sinusoids to observations of rotating spotted stars 

      Koen, Chris (Oxford University Press, 2007)
      It is assumed that K blocks (e.g. seasons) of observations are available, and the parameters characterizing a fixed-frequency sinusoidal variability (mean light level, amplitude, phase) are constant within each of the ...

    • Multicolour time series photometry of 2MASS 1207−3932 

      Koen, Chris (Oxford University Press, 2008)
      Time 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 ...