20 citations · 36 across the 4 of their papers we have counts for
3 papers · 1 filter
Time delay between images of the lensed quasar UM673
E. Koptelova, W. P. Chen, T. Chiueh +11
We study brightness variations in the double lensed quasar UM673 (Q0142-100) with the aim of measuring the time delay between its two images. In the paper we combine our previously…
PG 1115+080: variations of the A2/A1 flux ratio and new values of the time delays
V. S. Tsvetkova, V. G. Vakulik, V. M. Shulga +15
We report the results of our multicolor observations of PG 1115+080 with the 1.5-m telescope of the Maidanak Observatory (Uzbekistan, Central Asia) in 2001-2006. Monitoring data in…
Time delays in PG1115+080: new estimates
V. G. Vakulik, V. M. Shulga, R. E. Schild +13
We report new estimates of the time delays in the quadruple gravitationally lensed quasar PG1115+080, obtained from the monitoring data in filter R with the 1.5-m telescope at the…