Proposal code

w030

Proposal title

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

The

Investigators and their

Affiliations

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

Proposal Abstract

We propose to image, using VSOP in conjunction with the SHEVE array and the VLBA, all of the EGRET-identified (gamma-ray loud) AGN south of delta=-10^{\circ}. 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 well matched to the gamma-ray loud AGN. This is the second half of a proposal that was successfully initiated for VSOP AO1 (V115). Using Doppler factors estimated from VSOP-measured radio brightness temperatures to derive limits on jet speeds and angles to our line of sight, we can obtain an excellent indication of the importance relativistic beaming has for the gamma-ray properties of AGN. We are also continuing to monitor these gamma-ray loud and quiet sources with ground-based VLBI, to obtain additional constraints on beaming models from superluminal motion measurements.

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 AO2 proposals were submitted in May 1998, 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.