HQM is an optical broad-band photometric monitoring program carried out since Sept.~1988. Our main intention is to search for indications of microlensing in a sample of $\sim$\,100 selected quasars;...
Borgeest, U., Kühl, D., Linde, J. V., Linnert, M. D.
HQM is an optical broad-band photometric monitoring program carried out since Sept.~1988. We use a CCD camera equipped to the MPIA 1.2$\,$m telescope. Fully automatic photometric reduction relative...
ESO key programme, gravitational lensing: quasars and radio galaxies; a status report (1992)
Surdej, Jean, Angonin, M C, Arnaud, J, Bauer, T, Borgeest, U, Hainaut, O, ...
Distribution of Matter in the Universe, 2nd DAEC mtg
Profiles of a Key Programme: Gravitational Lensing (1989)
Surdej, Jean, Arnaud, J, Borgeest, U, Djorgovski, S, Fleischmann, F, Hammer, F, ...
Prior to Professor van der Laan's enquiry, in the March 1988 issue of the Messenger, on the general interest among astronomers from the European community to possibly participate in Key Programmes...
Observations of the new gravitational lens system UM 673 = Q 0142-100 (1988)
Surdej, Jean, Magain, Pierre, Swings, J-P, Borgeest, U, Courvoisier, T J-L, Kayer, R, ...
The authors have recently initiated a high resolution direct imaging survey of a selected sample of highly luminous quasars (HLQs). The observations are carried out with the 2.2 m telescope at ESO,...
Search for Gravitational Lensing from a Survey of Highly Luminous Quasars (1988)
Surdej, Jean, Swings, J-P, Magain, Pierre, Borgeest, U, Kayser, R, Refsdal, S, ...
Optical Surveys for Quasars, ASP Conference Series
Surdej, Jean, Magain, Pierre, Swings, Jean-Pierre, Remy, M, Borgeest, U, Kayser, R, ...
First D.A.E.C. workshop on "Large Scale Structures"