title: The Warsaw - Carnegie - Princeton Optical Gravitational Lens Experiment.
authors.affiliation: Warsaw University Observatory Al. Ujazdowskie 4, 00-478 Warszawa, PolandCarnegie Observatories 813 Santa Barbara St., Pasadena, CA 91101-1292Princeton University Observatory Princeton, NJ 08544-1001.
authors.forename: A
authors.initials: A
authors.lastname: Udalski
authors.affiliation: Warsaw University Observatory Al. Ujazdowskie 4, 00-478 Warszawa, PolandCarnegie Observatories 813 Santa Barbara St., Pasadena, CA 91101-1292Princeton University Observatory Princeton, NJ 08544-1001.
authors.forename: M
authors.initials: M
authors.lastname: Szymański
authors.affiliation: Warsaw University Observatory Al. Ujazdowskie 4, 00-478 Warszawa, PolandCarnegie Observatories 813 Santa Barbara St., Pasadena, CA 91101-1292Princeton University Observatory Princeton, NJ 08544-1001.
authors.forename: J
authors.initials: J
authors.lastname: Kaluzny
authors.affiliation: Warsaw University Observatory Al. Ujazdowskie 4, 00-478 Warszawa, PolandCarnegie Observatories 813 Santa Barbara St., Pasadena, CA 91101-1292Princeton University Observatory Princeton, NJ 08544-1001.
authors.forename: M
authors.initials: M
authors.lastname: Kubiak
authors.affiliation: Warsaw University Observatory Al. Ujazdowskie 4, 00-478 Warszawa, PolandCarnegie Observatories 813 Santa Barbara St., Pasadena, CA 91101-1292Princeton University Observatory Princeton, NJ 08544-1001.
authors.forename: M
authors.initials: M
authors.lastname: Mateo
authors.affiliation: Warsaw University Observatory Al. Ujazdowskie 4, 00-478 Warszawa, PolandCarnegie Observatories 813 Santa Barbara St., Pasadena, CA 91101-1292Princeton University Observatory Princeton, NJ 08544-1001.
authors.forename: G W
authors.initials: GW
authors.lastname: Preston
authors.affiliation: Warsaw University Observatory Al. Ujazdowskie 4, 00-478 Warszawa, PolandCarnegie Observatories 813 Santa Barbara St., Pasadena, CA 91101-1292Princeton University Observatory Princeton, NJ 08544-1001.
authors.forename: W
authors.initials: W
authors.lastname: Krzemiński
authors.affiliation: Warsaw University Observatory Al. Ujazdowskie 4, 00-478 Warszawa, PolandCarnegie Observatories 813 Santa Barbara St., Pasadena, CA 91101-1292Princeton University Observatory Princeton, NJ 08544-1001.
authors.forename: K Z
authors.initials: KZ
authors.lastname: Stanek
authors.affiliation: Warsaw University Observatory Al. Ujazdowskie 4, 00-478 Warszawa, PolandCarnegie Observatories 813 Santa Barbara St., Pasadena, CA 91101-1292Princeton University Observatory Princeton, NJ 08544-1001.
authors.forename: B
authors.initials: B
authors.lastname: Paczyński