  The BRITE constellation of nanosatellites observes very bright stars to
perform seismology. We have set up a spectropolarimetric survey of all BRITE
targets, i.e. all ~600 stars brighter than V=4, with Narval at TBL, ESPaDOnS at
CFHT and HarpsPol at ESO. We plan to reach a magnetic detection threshold of
Bpol = 50 G for stars hotter than F5 and Bpol = 5 G for cooler stars. This
program will allow us to combine magnetic information with the BRITE seismic
information and obtain a better interpretation and modelling of the internal
structure of the stars. It will also lead to new discoveries of very bright
magnetic stars, which are unique targets for follow-up and multi-technique
studies.
