Microwave Imaging in Support of the SERTS'97 Flight

Details Microwave Imaging in Support of the SERTS'97 Flight Microwave Imaging in Support of the SERTS'97 Flight

Jan 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...191.7317g&link_type=abstract

American Astronomical Society, 191st AAS Meeting, #73.17; Bulletin of the American Astronomical Society, Vol. 29, p.1323

Astronomy and Astrophysics

Astronomy

Scientific paper

The Solar Extreme-ultraviolet Rocket Telescope and Spectrograph flown successfully on 1997 November 18 at 19:35 UT and an observing campaign was conducted to support the flight. Coordinated observations were obtained by SOHO and YOHKOH and many ground based instruments. Radio observations were obtained by the Very Large Array (VLA) and the Nobeyama Radioheliograph in microwaves. The SERTS target was the trailing portion of a large active region (NOAA AR 8108) close to the disk center (N19E17 at 19:40 UT on 1997 November 18). The VLA obtained microwave images at 20, 6 and 3.6 cm wavelengths with a spatial resolution of about 40", 12" and 7" respectively. The Nobeyama images (spatial resolution 10") were obtained a few hours later at 1.7 cm. The microwave images (in total intensity and circular polarization) provide information on the physical conditions (temperature, density and magnetic field) in the active region corona and in sunspots at various heights above the solar surface. The AR was relatively quiet during the SERTS flight, so we can determine its quiescent properties. We present preliminary radio images of AR 8108 and the physical conditions derived from them. We thank T. Bastian for help in obtaining VLA observing time. This research was supported by NASA grant NAG-5-6139.

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