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VLBI observations of the gravitational lens system 0957+561 - Structure and relative magnification of the A and B imagesGravitationally lensed images of the quasar 0957+561 have been observed at 13 cm wavelength using a six-antenna VLBI array with nearly milliarcsecond resolution. Models of the observed surface brightness distribution of each of the A and B images provide support of the gravitational lens hypothesis. A value of the magnitude of the relative image magnification A/B of 0.64 + or - 0.03 is obtained.
Document ID
19890028060
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
doi:10.1086/166816
Authors
Gorenstein, M. V. (Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Shapiro, I. I. (Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Bonometti, R. J. (Harvard-Smithsonian Center for Astrophysics; MIT Cambridge, MA, United States)
Cohen, N. L. (Harvard-Smithsonian Center for Astrophysics; MIT, Cambridge, MA; Cornell University Ithaca, NY, United States)
Rogers, A. E. E. (Haystack Observatory Westford, MA, United States)
Date Acquired
August 14, 2013
Publication Date
November 1, 1988
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 334
ISSN: 0004-637X
Subject Category
Astronomy
Accession Number
89A15431
Funding Number(s)
CONTRACT_GRANT: NSF PHY-82-43330
CONTRACT_GRANT: NAS7-100
CONTRACT_GRANT: NSF AST-85-19763
CONTRACT_GRANT: NSF PHY-84-09671
CONTRACT_GRANT: NSF AST-83-00796
Distribution Limits
Public
Copyright
Other

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