Proposal code

v040

Proposal title

Multi-frequency Observations of the BL Lac Object 0235+164

The

Investigators and their

Affiliations

P.I. S. Frey FÖMI SGO, Hungary
L.I. Gurvits JIVE, The Netherlands
D.R. Altschuler, M.M. Davis NAIC, Arecibo Observatory, Puerto Rico
H. Hirabayashi ISAS, Japan

Proposal Abstract

We propose to observe the BL Lac object AO 0235+164 at all 3 VSOP frequencies (1.6, 5 and 22 GHz). The source is one of the most violently variable extragalactic objects at optical as well as radio wavelengths. The time scale of variability at centimeter wavelengts is some weeks. We propose monitoring of this source within the time interval permitted by the VSOP observing constraints. The multi-frequency imaging experiment will reveal whether there is any frequency dependence in the presumably time variable mas and sub-mas structures. The experiment would provide a critical test for alternative theoretical models of this peculiar BL Lac object. Its very compact core and the flat spectrum qualify 0235+164 as an ideal target for Space VLBI observations at all available frequencies.

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.