SDSS J1004+4112 AGN

Type
AGN
Status
Confirmed
Lensing
Multiply imaged
Lensing cluster
SDSS J1004+4112 (z = 0.68)
Redshift
1.734

Quasar at z = 1.734 lensed into four images up to 14.6 arcsec apart, the first quasar known to be lensed by a cluster (Inada et al. 2003); a faint fifth image lies near the brightest cluster galaxy (Inada et al. 2005). All the time delays are measured, the longest from a 14.5-year campaign (Muñoz et al. 2022), and are used for H0 measurements and to constrain the cluster's substructure. Microlensing of the images probes the quasar's accretion disc and broad-line region.

Papers

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