A program of international cooperative investigation of gravitational lens systems

Details A program of international cooperative investigation of gravitational lens systems A program of international cooperative investigation of gravitational lens systems

Sep 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000kfnts...3..170d&link_type=abstract

Kinematika i Fizika Nebesnykh Tel, Suppl, no. 3, p. 170-173

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Since 1997, a program of observations of gravitational lens systems (GLS) with the 1.5-m telescope of the high-altitude Maidanak Observatory has been carried out by joint efforts of seven institutions from five countries. The Q2237+0305, Q0957+561, SBS 1520+530, and other GLS were observed in VRI spectral bands using the TI 800×800, Pictor 416 and ST-7 CCD cameras with the aim to obtain the high-precise estimates of magnitudes and colours of the lensed quasar components at different epochs. The results of photometric image processing are presented. This work was made possible in part by Award No.UP2-302 of the U.S. Civilian Research and Development Foundation for the Independent States of the former Soviet Union (CRDF), and with the kind support of the Maidanak Foundation established in 1998 in Norway. Funding from the Uzbek-Ukrainian program of developing the Maidanak Observatory was also very important, as well as the 98--02--17490 and 1.2.5.5 grants from the Russian Basic Research Foundation. The Maidanak Observatory also participated in the successful Qouc-around-the-Clock program monitoring the Q0957+561 quasar continuously with 8 telescopes around the globe for 10 nights in January 2000.

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