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- W52568478 abstract "We report the detection of several arclets, a small arc, and a coherent gravitational shear field centered on the vicinity of two bright galaxies, ≃ 45″ away from the double quasar 2345+007. In addition we discovered a new QSO at z = 2.653 and at ≃ 2' from the center indicated by the shear. The shear is found from weak distortion of background galaxies and is representative of a cluster-like mass. This suggests a possibility that 2345+007 A, B are two images of the same source, split by a cluster-like mass. The two galaxies have redshift z = 0.28, and the field is too poor in bright galaxies to indicate a rich cluster at this redshift. In addition, if there were a cluster-like (dark) mass at z = 0.25 with a critical line passing between the A and B QSO images, the shear field would be significantly stronger than what we observe" @default.
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- W52568478 date "1993-12-01" @default.
- W52568478 modified "2023-10-18" @default.
- W52568478 title "Detection of weak lensing by a massive dark halo in Q 2345+007" @default.
- W52568478 hasPublicationYear "1993" @default.
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