Liverpool Quasar Lens Monitoring

This collection includes optical monitorings of gravitationally lensed quasars. The frames can be used to make light curves of quasar images and field objects. From quasar light curves, one may measure time delays and flux ratios, analyse variability and chromaticity, etc. These direct analyses/measurements are basic tools for different astrophysical studies, e.g., expansion rate of the Universe, mechanism of intrinsic variability in quasars, accretion disk structure, supermassive black holes, dark halos of galaxies (dust, collapsed dark matter, smoothly distributed dark matter,...)
No selection matches all, multiple values legal.
Object observed, Simbad resolvable identifier
Epoch at midpoint of observation
Exposure time
Air mass at center of observation
Background in counts
Estimate for seeing at observation time



Freeform name of the bandpass used
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