TROY project. I.

We used archival radial velocity data of 46 close-in (P<5-days) transiting planets (without detected companions) with information from high-precision radial velocity instruments. We took advantage of the time of mid-transit and secondary eclipses (when available) to constrain the possible presence of additional objects co-orbiting the star along with the planet. This, together with a good phase coverage, breaks the degeneracy between a trojan planet signature and signals coming from additional planets or underestimated eccentricity.

We identify nine systems for which the archival data provide >1-sigma evidence for a mass imbalance between L4 and L5. Two of these systems provide >2{sigma} detection, but no significant detection is found among our sample. We also report upper limits to the masses at L4/L5 in all studied systems and discuss the results in the context of previous findings.