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All Outputs (6)

Laser guide stars as comparison stars: correcting scintillation noise (2025)
Journal Article
Hartley, K. E., Calia, D. B., Bustos, F. P., Centrone, M., Jenkins, D., Wilson, R. W., & Osborn, J. (2025). Laser guide stars as comparison stars: correcting scintillation noise. Monthly Notices of the Royal Astronomical Society, 539(3), 1955-1963. https://doi.org/10.1093/mnras/staf614

The Earth’s atmosphere severely limits ground-based high precision photometry. Whilst adaptive optics can be used to improve image resolution, intensity fluctuations due to scintillation and atmospheric transparency variations remain. Scintillation n... Read More about Laser guide stars as comparison stars: correcting scintillation noise.

Demonstration of 24-hour continuous optical turbulence monitoring in a city (2025)
Journal Article
Beesley, L. F., Griffiths, R., Hartley, K., Farley, O. J., Quatresooz, F., Rodríguez-Gómez, A., Comerón, A., Townson, M., Alaluf, D., & Osborn, J. (2025). Demonstration of 24-hour continuous optical turbulence monitoring in a city. Optics Express, 33(5), 10140-10149. https://doi.org/10.1364/OE.543144

Atmospheric optical turbulence limits the performance of free-space optical communication links between the ground and space. The bandwidth provided by optical links enables the realization of ubiquitous, high-bandwidth and secure communications anyw... Read More about Demonstration of 24-hour continuous optical turbulence monitoring in a city.

Optimized temporal binning of comparison star measurements for differential photometry (2023)
Journal Article
Hartley, K. E., & Wilson, R. W. (2023). Optimized temporal binning of comparison star measurements for differential photometry. Monthly Notices of the Royal Astronomical Society, 526(3), 3482-3494. https://doi.org/10.1093/mnras/stad2964

Ground-based, high precision observations of the light curves of objects such as transiting exoplanets rely on the application of differential photometry. The flux of the target object is measured relative to a comparison star in the same field, allo... Read More about Optimized temporal binning of comparison star measurements for differential photometry.

Optical sparse telescope arrays and scintillation noise (2023)
Journal Article
Hartley, K. E., Farley, O. J. D., Townson, M. J., Osborn, J., & Wilson, R. W. (2023). Optical sparse telescope arrays and scintillation noise. Monthly Notices of the Royal Astronomical Society, 526(1), 1235-1245. https://doi.org/10.1093/mnras/stad2835

Fresnel propagation of starlight after it passes through high altitude turbulence in the Earth’s atmosphere results in random fluctuations of the intensity at ground level, known as scintillation. This effect adds random noise to photometric measurem... Read More about Optical sparse telescope arrays and scintillation noise.

First On-Sky Demonstration of a Scintillation Correction technique using Tomographic Wavefront Sensing (2023)
Journal Article
Hartley, K. E., Farley, O. J., Townson, M. J., Osborn, J., & Wilson, R. (2023). First On-Sky Demonstration of a Scintillation Correction technique using Tomographic Wavefront Sensing. Monthly Notices of the Royal Astronomical Society, 520(3), 4134-4146. https://doi.org/10.1093/mnras/stad420

Scintillation noise significantly limits high precision ground-based photometry of bright stars. In this paper we present the first ever on-sky demonstration of scintillation correction. The technique uses tomographic wavefront sensing to estimate th... Read More about First On-Sky Demonstration of a Scintillation Correction technique using Tomographic Wavefront Sensing.