Appendix A: Overview of observations

Table A.1 presents an overview of all measurements of the relative astrometry in T Tauri binary systems that form the database for the present study. In Fig. A.1 these measurements are plotted as a function of epoch for the individual systems in cartesian and polar coordinates.

Figure A.1: Relative astrometry of the components in T Tauri binary systems in cartesian coordinates (first and second column) and polar coordinates (third and fourth column). The solid lines indicate the results of weighted linear fits to this data. Triangles denote our new data presented in this paper. Asterisks refer to measurements of "first epoch'' that coincide with the detection of the companions. They have already been published (Leinert et al. 1993; Köhler & Leinert 1998). Squares indicate data points taken from literature, in most cases from G95 (see Table A.1 for reference)

Figure A.1: continued

Figure A.1: continued

Figure A.1: continued