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Finding Gravitational Lenses With X-rays

J. A. Munoz·C. S. Kochanek·E. E. Falco
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Abstract

There are $\sim 1$, 0.1 and 0.01 gravitationally lensed X-ray sources per square degree with soft X-ray fluxes exceeding $10^{-15}, 10^{-14}$ and $10^{-13} ergs/s cm^{-2}$ respectively. These sources will be detected serendipitously with the Chandra X-ray Observatory at a rate of 1--3 lenses per year of high resolution imaging. The low detection rate is due to the small area over which the HRC and ACIS cameras have the $<1\farcs5$ FWHM resolution necessary to find gravitational lenses produced by galaxies. Deep images of rich clusters at intermediate redshifts should yield one wide separation ($Δθ\gtorder 5\farcs0$) multiply-imaged background X-ray source for every $\sim 10$, 30 and 300 clusters imaged to the same flux limits.

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J. A. Munoz, C. S. Kochanek, E. E. Falco. 1999-05-22. Finding Gravitational Lenses With X-rays. https://doi.org/10.1086/312184

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