- Differential Astrometry over 15o,
M.A. Pérez-Torres, J. M. Marcaide, J. C. Guirado, & E. Ros,
4th EVN/JIVE Symposium, eds. M.A. Garrett, R.M. Campbell, L.I. Gurvits,
New Astronomy Reviews, in press (1999)
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- Abstract
We observed the pair of radio sources 1150+812 and 1803+784 in
November 1993 with a VLBI array,
simultaneously recording at 8.4 and 2.3 GHz.
We determined the angular separation between the two sources
with submilliarcsecond accuracy
by using differential techniques.
This result demonstrates the feasibility of high precision
differential astrometry for radio sources separated
in the sky by almost 15o, and opens the avenue
to its application to larger samples of radio sources.
Eduardo Ros
