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2022ApJ...927...45C - Astrophys. J., 927, 45-45 (2022/March-1)

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

CONNOR T., STERN D., KRONE-MARTINS A., DJORGOVSKI S.G., GRAHAM M.J., WALTON D.J., DELCHAMBRE L., DUCOURANT C., TEIXEIRA R., LE CAMPION J.-F., DEN BROK J.S., DOBIE D., GALLUCCIO L., JALAN P., KLIONER S.A., KLUTER J., MAHABAL A.A., NEGI V., NIERENBERG A., PETIT Q., SCARANO S.Jr, SLEZAK E., SLUSE D., SPINDOLA-DUARTE C., SURDEJ J. and WAMBSGANSS J.

Abstract (from CDS):

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 x10–14 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.

Abstract Copyright: © 2022. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Quasars - Strong gravitational lensing - X-ray astronomy - X-ray quasars - Scaling relations

Simbad objects: 12

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