Astronomy and Astrophysics – Astronomy
Scientific paper
May 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....98..205g&link_type=abstract
Astronomy and Astrophysics, vol. 98, no. 1, May 1981, p. 205, 206.
Astronomy and Astrophysics
Astronomy
5
Radio Astronomy, Radio Stars, Stellar Radiation, Superhigh Frequencies, Very Long Base Interferometry, Diffraction Patterns, High Resolution, Radiant Flux Density
Scientific paper
Observations of SS433 made on June 12, 1979, from West Germany, Massachusetts, and West Virginia are discussed. It is noted that SS433 did not show fringes on any baseline although all the calibration sources were seen at their expected strengths. The measured total flux density of SS433 was found to be approximately 0.5 Jy, consistent with previous observations. The source was observed by on-offs at each telescope, which indicates that they were all pointed properly during the observations. The absence of fringes is not attributed to poor observing conditions or instrumental difficulties. It is concluded that if all the 10.65 GHz radiation emanates from a single component, then that component is at least 0.005 arcsec (approximately 10 to the 14th cm) in size. The measurements made on more sensitive intercontinental baselines indicate that there is no component of SS433 smaller than 0.001 arcsec emitting 10.65 GHz radiation above a level of 50 mJy.
Downes J. B. A.
Geldzahler Barry J.
Shaffer David B.
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