E. Koptelova

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About

E. Koptelova is an astrophysicist whose research has made significant contributions to the study of gravitationally lensed quasars, a field at the intersection of observational astronomy and cosmology. Her work focuses on monitoring the photometric behavior of lensed quasar systems to disentangle intrinsic variability from microlensing effects — a challenging but crucial distinction for using these systems as cosmological probes. Among her most recognized contributions is the first robotic monitoring campaign of the lensed quasar SBS 0909+532, which garnered 31 citations and demonstrated the power of automated telescopes in time-domain astronomy. Her multi-year photometric study of Q0957+561, cited 25 times, extended the temporal baseline of observations in two color bands, enabling more precise time-delay measurements and new insights into the mechanisms driving quasar variability. Her analysis of FBQ 0951+2635, with 15 citations, further probed the subtle signatures of microlensing over multi-year baselines using the Maidanak Observatory in Uzbekistan. Koptelova's sustained observational campaigns have provided the astronomical community with high-quality light curves essential for constraining the Hubble constant and understanding quasar physics through gravitational lensing.