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Information × Registration Number 0309U003110, 0107U000673 , R & D reports Title Investigation of the gravitationally lensed systems and the analysis of the quasars structure popup.stage_title Інтерпретація результатів спостережень гравітаційно лінзованих квазарів; теоретичні дослідження та комп'ютерне моделювання явищ мікролінзувань Head Dudinov Volodimir Mikolayovich, Registration Date 04-02-2009 Organization Kharkov Natuional university named after V.N.Karazin popup.description2 Photometric processing of CCD images of some gravitational lens system (GLS) taken with the AZT-22 1.5-m telescope on Maidanak mountain in 2000-2006 was accomplished this year. The photometry of GLS PG 1115+080 allowed to substantially extend the existing R lightcurves. Noticeable variations of the components colours are argued to take place in the system. The second set of observing campaign of Q0957+561 was fulfilled this year in the framework of the international "QuOC Round-the-Clock" monitoring campaign, launched with the aim to obtain more precise estimate of the Hubble constant. A rather low photometric activity was found to be inherent in the newly discovered double quasar SBS 1520+530. However, a 0.25m decrease of the component B brightness was detected in 2001. The lensing galaxy was also discovered, for the first time in the R and I spectral bands. Speckle interferometric observations of close binary systems with the late-type components were carried out with the 6-meter BTA telescope. Product Description popup.authors popup.nrat_date 2020-04-02 Close