70 citations · 313 across the 13 of their papers we have counts for
13 papers
Simulating quasar microlensing light curves: High magnification events
Favio Neira, Timo Anguita, Georgios Vernardos
Quasar microlensing can be used to constrain important astrophysical properties, such as the accretion disk size and the amount of stars in the lensing galaxy. The associated brigh…
Autoencoder Reconstruction of Cosmological Microlensing Magnification Maps
Somayeh Khakpash, Federica Bianco, Georgios Vernardos +2
Enhanced modeling of microlensing variations in light curves of strongly lensed quasars improves measurements of cosmological time delays, the Hubble Constant, and quasar structure…
The Very Knotty Lenser: exploring the role of regularization in source and potential reconstructions using Gaussian Process Regression
Georgios Vernardos, Leon V. E. Koopmans
Reconstructing lens potentials and lensed sources can easily become an underconstrained problem, even when the degrees of freedom are low, due to degeneracies, particularly when po…
Microlensing flux ratio predictions for Euclid
Georgios Vernardos
Quasar microlensing flux ratios are used to unveil properties of the lenses in large collections of lensed quasars, like the ones expected to be produced by the Euclid survey. This…
A joint microlensing analysis of lensing mass and accretion disc models
Georgios Vernardos
Microlensing of multiply imaged quasars is a unique probe of quasar structure, down to the size of the accretion disc and the central black hole. Flux ratios between close pairs of…
HST imaging of four gravitationally lensed quasars
Nicholas F. Bate, Georgios Vernardos, Matthew J. O'Dowd +7
We present new HST WFPC3 imaging of four gravitationally lensed quasars: MG 0414+0534; RXJ 0911+0551; B 1422+231; WFI J2026-4536. In three of these systems we detect wavelength-dep…
The Impact of Microlensing on the Standardisation of Strongly Lensed Type Ia Supernovae
Max Foxley-Marrable, Thomas E. Collett, Georgios Vernardos +2
We investigate the effect of microlensing on the standardisation of strongly lensed Type Ia supernovae (GLSNe Ia). We present predictions for the amount of scatter induced by micro…
Data Compression in the Petascale Astronomy Era: a GERLUMPH case study
Dany Vohl, Christopher J. Fluke, Georgios Vernardos
As the volume of data grows, astronomers are increasingly faced with choices on what data to keep -- and what to throw away. Recent work evaluating the JPEG2000 (ISO/IEC 15444) sta…
GERLUMPH Data Release 2: 2.5 billion simulated microlensing light curves
Georgios Vernardos, Christopher J. Fluke, Nicholas F. Bate +2
In the upcoming synoptic all--sky survey era of astronomy, thousands of new multiply imaged quasars are expected to be discovered and monitored regularly. Light curves from the ima…
The effect of macromodel uncertainties on microlensing modelling of lensed quasars
Georgios Vernardos, Christopher J. Fluke
Cosmological gravitational microlensing has been proven to be a powerful tool to constrain the structure of multiply imaged quasars, especially the accretion disc and central super…
Adventures in the microlensing cloud: large datasets, eResearch tools, and GPUs
Georgios Vernardos, Christopher J Fluke
As astronomy enters the petascale data era, astronomers are faced with new challenges relating to storage, access and management of data. A shift from the traditional approach of c…
GERLUMPH Data Release 1: High-resolution cosmological microlensing magnification maps and eResearch tools
Georgios Vernardos, Christopher J Fluke, Nicholas F Bate +1
As synoptic all-sky surveys begin to discover new multiply lensed quasars, the flow of data will enable statistical cosmological microlensing studies of sufficient size to constrai…
A new parameter space study of cosmological microlensing
Georgios Vernardos, Christopher J. Fluke
Cosmological gravitational microlensing is a useful technique for understanding the structure of the inner parts of a quasar, especially the accretion disk and the central supermas…