Accurate and precise mass modelling of strong lensing systems is essential for extracting insights into cosmology, galaxy environments, and the nature of dark matter. The Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP), which has mapped ∼1000 square degrees of the sky, discovered over 1000 definite or probable galaxy-scale gravitational lens candidates. As the resolution of ground-based imaging poses challenges for accurate lens modelling, high-resolution imaging is traditionally sought after for detailed analyses of these systems. In this work, we instead propose applying the STARRED algorithm, which leverages starlet wavelet regularisation, as a preprocessing step before lens modelling to maximise the scientific output of the large HSC-SSP sample. We test this approach on seven HSC-like mock lensing systems with different lensing configurations. Our results show that the resolution boost from ∼0.6″ to ∼0.15″ enables improves accuracy and sub-3% precision measurements of key lensing parameters such as the Einstein radius, θE, and the mass axis ratio, qm, for ground-based images. These results pave the way for accurate measurements of key strong lensing quantities from a large sample of ground-based observations.
We present the weak gravitational lensing dataset from the Super-pressure Balloon-Borne Imaging Telescope (SuperBIT), which imaged 30 galaxy clusters during its 45 night flight in 2023 April–May. SuperBIT is a first-of-its-kind balloon-borne imaging telescope that achieved near-diffraction-limited observations in near-...
Sayan Saha, J. McCleary, Spencer W. Everett et al.· Astrophysical Journal· 0 citations
The Super-Pressure Balloon-borne Imaging Telescope (SuperBIT) completed its science flight in April 2023, obtaining imaging data for 30 galaxy clusters. In this work, we present the first weak-lensing convergence maps from these observations, using six clusters selected from the 30 targets. We construct background-gala...
Sayan Saha, Maya Amit, J. McCleary et al.· 0 citations
The matter power spectrum is one of the primary statistical descriptors of the large-scale distribution of matter in the Universe and provides a powerful probe of cosmic structure formation. Measurements of cosmic microwave background (CMB) lensing offer an integrated view of the matter distribution over a wide range o...
Ajoy Dawn, Jun-Qian Jiang, D. K. Hazra et al.· 0 citations
Galaxy clusters are the most powerful strong lenses; they greatly magnify the flux of distant and faint sources. Strong lensing also allows for the reconstruction of their mass distribution with sim1% accuracy and enables the investigation of cosmological parameters. The number of known systems of this type is bound to...
L. Leuzzi, M. Meneghetti, A. Adam et al.· Astronomy & Astrophysics· 0 citations
The start of the Legacy Survey of Space and Time marks a new era for strong lensing science, where the number of strong lenses identified is expected to increase to ∼100 000. In this paper we use a neural network to determine the precision with which lens parameters can be determined, using realistic simulated LSST l...
Philip Holloway, Aprajita Verma, Philip J. Marshall et al.· Monthly notices of the Royal...· 0 citations
Due to the diffraction limit of conventional telescopes, the angular resolution of single-aperture instruments in the visible band is typically restricted to ~0.02 arcseconds, which hampers the effective resolution and imaging of close binary systems and stellar surface features. To overcome this limitation, optical in...
