Gaia GraL: Gaia DR2 Gravitational Lens Systems. VII. XMM-Newton Observations of Lensed Quasars

Connor, Thomas, Stern, Daniel, Krone-Martins, Alberto, Djorgovski, S. G., Graham, Matthew J., Walton, Dominic J., Delchambre, Ludovic, Ducourant, Christine, Teixeira, Ramachrisna, Campion, Jean-François Le, Brok, Jakob Sebastian den, Dobie, Dougal, Galluccio, Laurent, Jalan, Priyanka, Klioner, Sergei A., Klüter, Jonas, Mahabal, Ashish A., Negi, Vibhore, Nierenberg, Anna, Petit, Quentin, Jr, Sergio Scarano, Slezak, Eric, Sluse, Dominique, Spíndola-Duarte, Carolina, Surdej, Jean and Wambsganss, Joachim (2022) Gaia GraL: Gaia DR2 Gravitational Lens Systems. VII. XMM-Newton Observations of Lensed Quasars. The Astrophysical Journal, 927 (1): 45. ISSN 0004-637X

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We present XMM-Newton X-ray observations of nine confirmed lensed quasars at 1 ≲ z ≲ 3 identified by the Gaia Gravitational Lens program. Eight systems are strongly detected, with 0.3-8.0 keV fluxes F 0.3-8.0 ≳ 5 ×10-14 erg cm-2 s-1. Modeling the X-ray spectra with an absorbed power law, we derive power-law photon indices and 2-10 keV luminosities for the eight detected quasars. In addition to presenting sample properties for larger quasar population studies and for use in planning for future caustic-crossing events, we also identify three quasars of interest: a quasar that shows evidence of flux variability from previous ROSAT observations, the most closely separated individual lensed sources resolved by XMM-Newton, and one of the X-ray brightest quasars known at z > 3. These sources represent the tip of the discoveries that will be enabled by SRG/eROSITA.

Item Type	Article
Additional information	© 2022. The Author(s). Published by the American Astronomical Society. This is the accepted manuscript version of an article which has been published in final form at https://doi.org/10.3847/1538-4357/ac4476
Keywords	astro-ph.ga, astro-ph.he, astronomy and astrophysics, space and planetary science
Date Deposited	15 May 2025 14:53
Last Modified	31 May 2025 00:34