TY  - JOUR
A1  - Wisotzki, Lutz
A1  - Schechter, P. L.
A1  - Chen, H. W.
A1  - Richstone, D.
A1  - Jahnke, Knud
A1  - Sanchez, Sebastian F.
A1  - Reimers, Dieter
T1  - HE 0047-1756 : a new gravitationally lensed double QSO
N2  - The quasar HE 0047-1756, at z = 1.67, is found to be split into two images 1."144 apart by an intervening galaxy acting as a gravitational lens. The flux ratio for the two components is roughly 3.5:1, depending slightly upon wavelength. The lensing galaxy is seen on images obtained in the i (800 nm) and K-s bands (2.1 mum); there is also a nearby faint object which may be responsible for some shear. The spectra of the two quasar images are nearly identical, but the emission line ratio between the two components scale differently from the continuum. Moreover, the fainter component has a bluer continuum slope than the brighter one. We argue that these small differences are probably due to microlensing. There is evidence for a partial Einstein ring emanating from the brighter image toward the fainter one
Y1  - 2004
SN  - 0004-6361
ER  - 
TY  - JOUR
A1  - Schechter, P. L.
A1  - Wambsganss, Joachim
A1  - Lewis, G. F.
T1  - Qualitative aspects of quasar microlensing with two mass components : Magnification patterns and probability distributions
N2  - It has been conjectured that the distribution of magnifications of a point source microlensed by a randomly distributed population of intervening point masses is independent of its mass spectrum. We present gedanken experiments that cast doubt on this conjecture and numerical simulations that show it to be false
Y1  - 2004
SN  - 0004-637X
ER  -