Proposal code

w011

Proposal title

Two-Epoch Mapping of Three Variable CGRO Blazars

The

Investigators and their

Affiliations

P.I. W. T. Vestrand Univ. New Hampshire, USA
J. S. Ulvestad NRAO, USA
J. G. Stacy LSU \& Southern Univ., USA
J. A. Biretta STScI, USA

Proposal Abstract

We propose the second epoch of 5-GHz VSOP observations of three active gamma-ray blazars with known or probable superluminal properties. First-epoch observations are already scheduled between mid-1998 and January 1999. The three blazars proposed, 0208-512, 0804+499, and 1633+382, have been monitored by multiwavelength campaigns that span the entire spectrum from GeV gamma-rays to cm radio wavelengths. Two of the three have been imaged by us previously in our 8-GHz VLBA program. The most popular gamma-ray blazar models predict the emergence of a new VLBI jet component a period of months to years after a gamma-ray flare with an apparent transverse speed that is predictable from the multiwavelength properties of the outburst. The high resolution of VSOP measurements is clearly important for these sources, both to test the models for gamma-ray blazars and to better delineate the VLBI structure.

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.