  I calculate the physical properties of 32 transiting extrasolar planet and
brown dwarf systems from existing photometric observations and measured
spectroscopic parameters. The systems studied include fifteen observed by
CoRoT, ten by Kepler and five by the Deep Impact spacecraft. Inclusion of the
objects studied in previous papers leads to a sample of 58 transiting systems
with homogeneously measured properties. The Kepler data include observations
from Quarter 2, and my analyses of several of the systems are the first to be
based on short-cadence data from this satellite. The light curves are modelled
using the JKTEBOP code, with attention paid to the treatment of limb darkening,
contaminating light, eccentricity, correlated noise, and numerical integration
over long exposure times. The physical properties are derived using constraints
from five sets of theoretical stellar model predictions. An alternative
approach using a calibration from eclipsing binary star systems is explored and
found to give comparable numbers. My results are in good agreement with
published properties for most of the transiting systems, but discrepancies are
identified for CoRoT-5, CoRoT-8, CoRoT-13, Kepler-5 and Kepler-7. Many of the
errorbars quoted in the literature are underestimated. Refined orbital
ephemerides are given for CoRoT-8 and for the Kepler planets. Asteroseismic
constraints on the density of the host stars are in good agreement with the
photometric equivalents for HD 17156 and TrES-2, but not for HAT-P-7 and
HAT-P-11. Complete error budgets are generated for each transiting system.
Whilst most would benefit from further photometry and spectroscopy, HD 17156,
HD 80606, HAT-P-7 and TrES-2 are now extremely well characterised. HAT-P-11 is
an exceptional candidate for studying starspots. The orbital ephemerides of
some transiting systems are becoming uncertain and they should be re-observed.
