Constraints on the mass and semimajor axis of the external companion to TOI-1238 based on photometric, astrometric,and spectroscopic observables. Colored areas represent regions excluded by the various observations (see legend and text). Possible masses and orbital separations of this companion are contained within the white area. The limits of theordinate axis are given by the possible minimum mass of the companion (in a circular orbit) and the stellar mass, while the limits of the abscissa axis are determined by the minimum and maximum orbital separations.