Proposal code

v115

Proposal title

gamma-ray loud and quiet AGN with VSOP and SHEVE at 5 GHz

The

Investigators and their

Affiliations

P.I. S. Tingay Mount Stromlo Observatory
D. Jauncey, J. Reynolds, A. Tzioumis, E. King ATNF
J. Lovell, P. McCulloch, M. Costa University of Tasmania
P. Dewney, W. Cannon DRAO, ISTS
G. Nicolson Hartebeesthoek RAO
R. Preston, D. Murphy, D. Jones, D. Meier Jet Propulsion Laboratory
P. Edwards, H. Hirabayashi ISAS
E. Valtaoja, M. Tornikoski Metsahovi Radio Observatory
T. Venturi IRA-CNR

Proposal Abstract

We propose to image, using VSOP in conjunction with the SHEVE ground array, all of the EGRET identified (gamma-ray loud) AGN south of delta=-40. In addition we propose to image a sample of gamma-ray quiet AGN which have been selected on the basis that their radio and optical properties are matched to the gamma-ray loud AGN. Using Doppler factors estimated from VSOP measured radio brightness temperatures to derive limits on the jet speeds and angles to our line-of-sight we can obtain an excellent indication of the importance of relativistic beaming to the gamma-ray properties of AGN. We are currently engaged in monitoring these gamma-ray quiet and loud AGN with Earth based VLBI observations, since the best constraints on beaming models come from a combination of the brightness temperature and superluminal motion constraints.

The full Cover Sheets (compressed post-script, typically 50kbytes) can be retrieved. Note that many proposals were reduced in extent by the Scientific Review Committee (e.g. by reducing the number of experiments), however the Cover Sheets contain the full proposal as submitted. Also note that AO1 proposals were submitted in November 1995, and information such as affiliations and contact details has changed for some proposers since that time. The Cover Sheets (and the details on this page, which were derived from the Cover Sheets) may therefore have changed.