IAU01732
Presentation type requested: EITHER
THE VSOP SURVEY PROGRAM OF 402 ACTIVE GALACTIC NUCLEI
Philip G Edwards
Institute of Space and Astronautical Science
The VLBI Space Observatory Programme (VSOP) is imaging radio sources at 1.6 and 5 GHz with a linear resolution three-times greater than with ground arrays at these frequencies. A major component of the mission is the VSOP Survey Program, a mission-led survey at 5 GHz of a complete sample of 402 bright, compact, extra-galactic radio sources. Based on pre-launch observations, 294 sources have been selected for VSOP observations with the HALCA satellite and an array of typically three ground telescopes. Space VLBI offers unique sensitivity to the brightness temperature of radio sources, and thus allows the importance of Doppler boosting in active galactic nuclei to be probed. The major goals of the VSOP Survey Program are statistical in nature: to determine the brightness temperature and approximate structure of sources; to provide a source list for future VLBI and space VLBI observations; and to compare radio properties with data from other wavelengths, such as matched resolution images from the VLBA 2cm survey. This paper will describe the current status of the Survey and present results from observations to date.
Hirabayashi Hisashi , Murata Yasuhiro , Dodson Richard G, Fomalont Edward B, Moellenbrock George A, Lovell James E, Scott William K, Horiuchi Shinji
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