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Discovery of a Fifth Image of the Large Separation Gravitationally Lensed Quasar SDSS J1004+4112

Castander, Francisco J.; Hennawi, Joseph F.; Hall, Patrick B. +11 more

We report on the discovery of a fifth lensed image in the large separation lensed quasar system SDSS J1004 + 4112. A faint point source located 0.''2 from the center of the brightest galaxy in the lensing cluster was detected in images taken with the Advanced Camera for Surveys (ACS) and the Near Infrared Camera and Multi-Object Spectrometer (NICM…

Discovery of a Strongly Lensed Galaxy at z=3.9 behind a z=0.83 Galaxy Cluster

Kodama, Tadayuki; Tanaka, Ichi; Umetsu, Keiichi +4 more

We report on the discovery and spectroscopic confirmation of three gravitationally-lensed images of a galaxy at z=3.9 in the background of a distant, rich cluster of galaxies at z=0.83, on the basis of observations with Faint Object Camera And Spectrograph on the Subaru telescope. We construct a simple lens model of the cluster mass distribution b…

On I Line Emission in the Quasar PG 1116+215

Oyabu, Shinki; Matsuoka, Yoshiki; Yoshii, Yuzuru +2 more

By observing the near-infrared spectrum of the quasar PG 1116+215 at z = 0.176 and combining with the HST/FOS spectrum, we obtained the relative strengths of three permitted O I lines (λ1304, λ8446, and λ11287) in a quasar for the first time. The photon flux ratios of the O I lines of the quasar were compared with those previously measured in a Se…