The brighter-fatter effect is an important systematic arising in CCD sensors, and its characterisation and mitigation have become quite routine in recent years, generally by means either of measuring the correlations in flat fields, or by directly measuring the signal dependent width of the point spread function in projected spots.
In this contribution we describe an investigation into...
Weak lensing science relies crucially on high fidelity PSF estimation (using unresolved field stars) in order to estimate underlying shears in large numbers of faint background galaxies. The response of pixel boundary distortions induced (during image integration) - by the building accumulation of conversions at the channel - is referred to as the brighter-fatter effect (BFE) and its...
In the pursuit of observing fainter astronomical sources and phenomena, a significant challenge in detector development lies in ensuring these devices can detect each individual photon they receive.
By amplifying each incoming photon by several orders of magnitude, Electron-Multiplying CCDs (EMCCDs), offer a promising solution to meet this challenge.
While these powerful detectors boast...
Photon counting detectors with Microchannel Plates (MCPs) provide unique capabilities in astronomy applications where detection of photons with very low dark count rate, large dynamic range, high spatial and timing resolution is required. Over the years development of this type of sensor has substantially improved giving enhanced counting rate capabilities, lifetime, spatial and temporal...
