Tomographic studies of exoplanet atmospheres

We review the current state of models for the optical and near-infrared reflection spectra of exoplanetary atmospheres, with particular reference to the close-orbiting giant planets that offer the best prospects for high-resolution spectroscopic detection. We describe the main steps in the tomographic procedures that have been used in recent attempts to separate these faint signals from the direct spectra of the parent stars. We compare recent, deep upper limits on planetary albedos with model predictions, and discuss prospects for future attempts to detect and characterise the reflection, transmission and thermal emission spectra of these planets at optical and infrared wavelengths.