6533b825fe1ef96bd128205a

RESEARCH PRODUCT

Space-VLBI phase-reference mapping and astrometry

Eduardo RosJ. M. MarcaideDayton L. JonesRobert A. PrestonJean-francois LestradeMiguel A. Pérez-torresJ. C. Guirado

subject

B1342+662B1342+663InterferometricFOS: Physical sciencesAstrophysicsUNESCO::ASTRONOMÍA Y ASTROFÍSICAAstrophysicsVery-long-baseline interferometryQuasarsPhysicsSpacecraftbusiness.industryAstrophysics (astro-ph)Astrophysics::Instrumentation and Methods for AstrophysicsAstronomy and AstrophysicsQuasarAstrometryAstrometryGeodesy:ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia [UNESCO]Astrometry ; Interferometric ; Quasars ; B1342+662 ; B1342+663Space and Planetary ScienceMagnitude (astronomy)Orbit (dynamics)SatelliteAntenna (radio)UNESCO::ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogoniabusiness:ASTRONOMÍA Y ASTROFÍSICA [UNESCO]

description

We present 5 GHz space-VLBI observations of the quasar pair B1342+662/B1342+663 that demonstrate the feasibility of phase-reference techniques using an antenna in space. The space-based data were taken by the satellite HALCA, of the space-VLBI mission VSOP. From residual (referenced) phases we derive an upper bound of 10 meters to the uncertainty of the spacecraft orbit reconstruction. An analysis of the phase-reference maps of the sources additionally suggests that the above mentioned uncertaintyis likely not larger than 3 meters. With errors of this magnitude, HALCA is a useful tool for astrometric studies of close pairs of radio sources.

yearjournalcountryeditionlanguage
2001-04-23
10.1051/0004-6361:20010370http://arxiv.org/abs/astro-ph/0104365