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Context. Inhomogeneities alongside the line of sight in sturdy gravitational lensing distort the images produced, in an effect called shear. If measurable, this shear could present impartial constraints on cosmological parameters, complementary to conventional cosmic shear. Aims. We mannequin 50 strong gravitational lenses from the Sloan Lens ACS (SLACS) catalogue with the purpose of measuring the line-of-sight (LOS) shear for the primary time. We use the ‘minimal model’ for the LOS shear, which has been shown to be theoretically secure from degeneracies with lens model parameters, a finding which has been confirmed using mock information. Methods. We use the dolphin automated modelling pipeline, which uses the lenstronomy software as a modelling engine, to mannequin our chosen lenses. We model the principle deflector with an elliptical power legislation profile, the lens gentle with elliptical Sérsic profiles and the supply with a foundation set of shapelets and an elliptical Sérsic profile. Results. We efficiently obtain a line-of-sight shear measurement from 18 of the 50 lenses.
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