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HST Observations and Models of The Gravitational Lens System MG 0414+0534
Emilio E. Falco, Joseph Lehar, Irwin I. Shapiro
Quadruple gravitational lens systems offer the possibility of measuring time delays for image pairs, microlensing effects, and extinction in distant galaxies. Observations of these…
SBS 0909+532: A New Double Gravitational Lens or Binary Quasar?
C. S. Kochanek, E. E. Falco, R. Schild +3
The z=1.377, B=17.0 mag quasar SBS 0909+532 A, B is a double with two images separated by 1.107 +/- 0.006 arcsec. Because the faint image has an emission line at the same wavelengt…
The Quadruple Gravitational Lens PG1115+080: Time Delays and Models
P. L. Schechter, C. D. Bailyn, R. Barr +24
Optical photometry is presented for the quadruple gravitational lens PG1115+080. A preliminary reduction of data taken from November 1995 to June 1996 gives component ``C'' leading…