Frédéric Courbin, Georges Meylan, Malte Tewes, François Henri Ambroise Rérat
We present the first case of strong gravitational lensing by a QSO: SDSS J0013 + 1523 at z = 0.120. The discovery is the result of a systematic search for emission lines redshifted behind QSOs, among 22 298 spectra of the SDSS data release 7. Apart from th ...
2010