3 papers
astro-ph.IM2021
Measuring time delays: II. Using observations of the unresolved flux and astrometry
Ofer M. Springer, Eran O. Ofek
Lensed quasars and supernovae can be used to study galaxies' gravitational potential and measure cosmological parameters. The typical image separation of objects lensed by galaxies…
astro-ph.IM2021
Measuring time delays: I. Using a flux time series that is a linear combination of time-shifted light curves
Ofer M. Springer, Eran O. Ofek
(Abridged) Several phenomena in astrophysics generate light curves with time delays. Among these are reverberation mapping, and lensed quasars. In some systems, the measurement of…
astro-ph.CO2018
Weak lensing shear estimation beyond the shape-noise limit: a machine learning approach
Ofer M. Springer, Eran O. Ofek, Yair Weiss +1
Weak lensing shear estimation typically results in per galaxy statistical errors significantly larger than the sought after gravitational signal of only a few percent. These statis…