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The milli-arcsecond images of Q0957 + 561VLBI observations at 13 cm have detected similar compact radio sources in the A and B images of the quasar QO957 + 561, and the images are noted to contain core components with flux densities of 22 + or - 1 and 18 + or - 1 mJy, respectively. Data from the short Effelsberg-Madrid baseline suggest that additional correlated flux density, distributed over an angular scale of about 20 milliarcsec accompanies both cores. The observed brightness distributions of these cores are related by a linear magnification matrix, consistent with observation of surface brightness, as would be expected for images produced by a transparent gravitational lens. A search was conducted for evidence of additional compact radio structure within a region encompassing the positions of the galaxy G1 and the B image.
Document ID
19850041332
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Gorenstein, M. V.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Shapiro, I. I.
(Harvard-Smithsonian Center for Astrophysics; MIT Cambridge, MA, United States)
Rogers, A. E. E.
(Haystack Observatory Westford, MA, United States)
Cohen, N. L.
(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA; Cornell University Ithaca, NY, United States)
Corey, B. E.
(MIT, Cambridge; Haystack Observatory, Westford MA, United States)
Porcas, R. W.
(Max-Planck-Institut fuer Radioastronomie Bonn, Germany)
Falco, E. E.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Bonometti, R. J.
(MIT Cambridge, MA, United States)
Preston, R. A.
(California Institute of Technology, Jet Propulsion Laboratory, Pasadena CA, United States)
Rius, A.
(NASA Instituto Nacional de Tecnica Aeroespacial Madrid, Spain)
Date Acquired
August 12, 2013
Publication Date
December 15, 1984
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 287
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
85A23483
Funding Number(s)
CONTRACT_GRANT: NSF PHY-78-07769
CONTRACT_GRANT: NAS7-100
CONTRACT_GRANT: NGR-22-099-839
CONTRACT_GRANT: NSF AST-80-22229
Distribution Limits
Public
Copyright
Other

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