UBVr photometry of 2345+007 A, B, and the gravitational lens hypothesis

Details UBVr photometry of 2345+007 A, B, and the gravitational lens hypothesis UBVr photometry of 2345+007 A, B, and the gravitational lens hypothesis

Mar 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...132..105s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 132, no. 1, March 1984, p. 105-109.

Astronomy and Astrophysics

Astrophysics

16

Astronomical Photometry, Gravitational Lenses, Quasars, Ubv Spectra, Astronomical Models, Galactic Clusters, Image Analysis

Scientific paper

UBVr measurements of 2345+007 A, B are found to be compatible with the gravitational lens hypothesis. If so, the main deflecting galaxy could not be brighter than V ≈ 22.2, r ≈ 21.5. Such a galaxy could belong to a group at z > 0.5 which would help to the lensing and increase the separation of the 2 detected images. The four faint galaxies around 2345+007 would be the brightest members of this group. Small variations (≈ 0.2 mag) of both components are observed between December 1981 and November 1982.

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