Earth-space VLBI of the quasar pair 1038+52A,B Original Research Article

We present recent results from 1.6 GHz space-ground VLBI observations of the quasar pair 1038+52A and B using the HALCA orbiting antenna, and a ground array consisting of the VLBA and the DSN antennas at Robledo and Goldstone. The two sources are separated by only 33 arcsec on the sky, and could thus be observed simultaneously with all VLBI elements. Separate correlations were made with the VLBA correlator for the two quasars, which allows us to image both sources separately, and also provides a unique opportunity to investigate both phase-referencing and relative astrometry on Earth-Space baselines.