4 papers · 1 filter
The time-delay of the gravitationally lensed double quasar UM 673
T. A. Akhunov, R. W. Schmidt, O. Burkhonov +11
The paper has been withdrawn because double checking and comparison with other data sets after the original submission showed that a broken R-band filter at the Maidanak telescope…
Observational determination of the time delays in gravitational lens system Q2237+030
V. Vakulik, R. Schild, V. Dudinov +4
We present new brightness monitoring observations of the 4 components of gravitationally lensed system Q2237+0305, which show detection of an intrinsic quasar brightness fluctuatio…
Color Effects Associated with the 1999 Microlensing Brightness Peaks in Gravitationally Lensed Quasar Q2237+0305
V. G. Vakulik, R. E. Schild, V. N. Dudinov +9
Photometry of the Q2237+0305gravitational lens in VRI spectral bands with the 1.5-m telescope of the high-altitude Maidanak observatory in 1995-2000 is presented. Monitoring of Q22…
Finding out the velocity anisotropy parameter for some globular clusters: the case of stationary model
Abdikul E. Ashurov, Salakhutdin N. Nuritdinov
The problem of determination of the velocity anisotropy parameter (A) from star density profiles in globular clusters is considered. The calculations are performed for following cl…