Proposal code

w085

Proposal title

The Second Epoch Observation of Active CSS 3C 380

The

Investigators and their

Affiliations

P.I. Seiji Kameno VSOP project, NAO Japan
Makoto Inoue VSOP project, NAO Japan
Hiroto Tabara Utsunomiya University, Japan
Kenta Fujisawa VSOP project, NAO Japan
Kiyoaki Wajima VSOP project, ISAS Japan

Proposal Abstract

We propose the second epoch VSOP observations towards a CSS source 3C 380 at L and C band. This object is unique among CSSs, in which superluminal jet motion and flare at mm-wavelength were reported, and is a good probe for CSS environment. Comparing with the AO1 observations scheduled on 4 and 5 July 1998, we can measure spectral change at the knot component A, which is considered to be interacting with ambient gas shown by our J-net 22 GHz observation. We also measure the change of spectral index from the core to end along the jet, to illustrate synchrotron loss. Furthermore, two epoch observation allow us to detect apparent motion of knot components. We expect to detect a new compont ejected at the flare in 1990, and measure its speed. Comparison of the speed with knot A is important to investigate acceleration region in the jet.

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.