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Table 1.

Position of the eRASS1 J050129.5−073309 components.

Component Telescope α(2000.0) err α δ(2000.0) err δ Δα err Δα Δδ err Δδ
[deg] [mas] [deg] [mas] [″] [mas] [″] [mas]
Image A Gaia 75.372574 0.05 −7.551979 0.04
Image B Gaia 75.373176 0.06 −7.551526 0.05 2.17 0.08 1.63 0.06
Lensing galaxy DECals DR10 75.3727 11.89 −7.5516 11.11 0.38 11.89 1.49 11.11
Foreground star Gaia 75.373665 1.58 −7.551639 1.11 3.93 1.58 1.22 1.11

Notes. The quasar images and the foreground star are detected by both Gaia and LS DR10, while the lensing galaxy is only detected by LS DR10. We also list the relative position (Δα, Δδ) of the sources in the field of view with respect to the Gaia position of image A.

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