Phase-Reference Observations with VSOP

Details Phase-Reference Observations with VSOP Phase-Reference Observations with VSOP

Apr 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aprs.conf..245p&link_type=abstract

Astrophysical Phenomena Revealed by Space VLBI, Proceedings of the VSOP Symposium, held at the Institute of Space and astronauti

Astronomy and Astrophysics

Astrophysics

8

Scientific paper

We discuss problems associated with VLBI phase-referencing observations made with an orbiting antenna in space. Although HALCA cannot switch rapidly between sources, relative phase measurements between two close sources are possible if both are within the primary beam. We review VLBI Space Observatory Program (VSOP) observations of such pairs, and present a preliminary analysis for the source pair 1308+326 and 1308+328. For these observations the HALCA orbit was sufficiently well determined that it was possible to make a phase-reference map of 1308+326 and to perform the first ever Ground-Space VLBI relative astrometry between physically unrelated sources.

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