Gf. Benedict et al., Precise masses for Wolf 1062 AB from Hubble Space Telescope interferometric astrometry and McDonald Observatory radial velocities, ASTRONOM J, 121(3), 2001, pp. 1607-1613
We present an analysis of astrometric data from Fine Guidance Sensor 3 (FGS
3), a white-light interferometer on HST, and of radial velocity data from
two ground-based campaigns. We model the astrometric and radial velocity me
asurements simultaneously to obtain parallax, proper motion, and component
masses for Wolf 1062 (G1 748; M3.5 V). To derive the mass fraction, we rela
te FGS 3 fringe scanning observations of the science target to a reference
frame provided by fringe tracking observations of a surrounding star field.
We obtain an absolute parallax (pi (abs) = 98.0 +/- 0.4 mas) yielding M (A
) = 0.379 +/- 0.005 M. and M (B) = 0.192 +/- 0.003 M ., high-quality comone
nt masses with errors of only 1.5%.