Proposal code

w402

Proposal title

High Ecliptic Latitude Monitoring (HELM) Program

The

Investigators and their

Affiliations

P.I. David W. Murphy JPL, USA
M. Lister, R. Preston JPL, USA
H. Hirabayashi, P. Edwards ISAS, Japan
S. Tingay ATNF, Australia

Proposal Abstract

We propose to monitor the only flat-spectrum AGNs (1642+690, 1749+701, 1807+698 and 1823+568) in the Pearson-Readhead survey which lie within 10 degrees of the north ecliptic pole. The ecliptic poles are the only region of the sky in which VSOP can perform monitoring observations given the new spacecraft constraints. Since we already have approved multiple epoch VSOP observations of an additional source in this region (1928+738), our sample is comprised of five of the best sources VSOP can continue to monitor. We plan to examine the time evolution of component brightness temperatures as components leave the core region, and see if there are any differences between the 3 BL Lacs and 2 quasars in the sample. In addition, all of these sources have shown IDV characteristics, and we will further investigate our previously detected link between the highest brightness temperature sources and the IDV phenomena.

The full Cover Sheets (compressed post-script, typically 50kbytes) can be retrieved. Note that some 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 AO4 proposals were submitted in October 2000, and information such as affiliations and contact details has changed for some proposers since that time.