Zobrazeno 1 - 10
of 275
pro vyhledávání: '"Galaxy Shape Measurement"'
Autor:
Rivi, Marzia, Miller, Lance
Publikováno v:
Astronomy & Computing vol.39(2022) 100574
The new generation radio telescopes, such as the Square Kilometre Array (SKA), are expected to reach sufficient sensitivity and resolution to provide large number densities of resolved faint sources, and therefore to open weak gravitational lensing o
Externí odkaz:
http://arxiv.org/abs/2203.14071
We present our results from training and evaluating a convolutional neural network (CNN) to predict galaxy shapes from wide-field survey images of the first data release of the Dark Energy Survey (DES DR1). We use conventional shape measurements as g
Externí odkaz:
http://arxiv.org/abs/1902.08161
We demonstrate that a joint analysis of LSST-like ground-based imaging with Euclid-like space-based imaging leads to increased precision and accuracy in galaxy shape measurements. At galaxy magnitudes of $i \sim 24.5$, a combined survey analysis incr
Externí odkaz:
http://arxiv.org/abs/1901.08586
Publikováno v:
MNRAS 2019, 482(1): 1096-1109
Radio weak lensing, while a highly promising complementary probe to optical weak lensing, will require incredible precision in the measurement of galaxy shape parameters. In this paper, we extend the Bayesian Inference for Radio Observations model fi
Externí odkaz:
http://arxiv.org/abs/1805.06799
It is anticipated that the large sky areas covered by planned wide-field weak lensing surveys will reduce statistical errors to such an extent that systematic errors will instead become the dominant source of uncertainty. It is therefore crucial to d
Externí odkaz:
http://arxiv.org/abs/1211.4847
Autor:
Miller, L., Heymans, C., Kitching, T. D., Van Waerbeke, L., Erben, T., Hildebrandt, H., Hoekstra, H., Mellier, Y., Rowe, B. T. P., Coupon, J., Dietrich, J. P., Fu, L., Harnois-Deraps, J., Hudson, M. J., Kilbinger, M., Kuijken, K., Schrabback, T., Semboloni, E., Vafaei, S., Velander, M.
Publikováno v:
MNRAS (2013), 429, 2858
A likelihood-based method for measuring weak gravitational lensing shear in deep galaxy surveys is described and applied to the Canada-France-Hawaii Telescope (CFHT) Lensing Survey (CFHTLenS). CFHTLenS comprises 154 sq deg of multicolour optical data
Externí odkaz:
http://arxiv.org/abs/1210.8201
We extend the Bayesian model fitting shape measurement method presented in Miller et al. (2007) and use the method to estimate the shear from the Shear TEsting Programme simulations (STEP). The method uses a fast model fitting algorithm which uses re
Externí odkaz:
http://arxiv.org/abs/0802.1528
The principles of measuring the shapes of galaxies by a model-fitting approach are discussed in the context of shape-measurement for surveys of weak gravitational lensing. It is argued that such an approach should be optimal, allowing measurement wit
Externí odkaz:
http://arxiv.org/abs/0708.2340
Akademický článek
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Publikováno v:
Astronomy and Computing. 39:100574
The new generation radio telescopes, such as the Square Kilometre Array (SKA), are expected to reach sufficient sensitivity and resolution to provide large number densities of resolved faint sources, and therefore to open weak gravitational lensing o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::72b28badecd6b1fd215b2574bd0d8b47
https://doi.org/10.1016/j.ascom.2022.100574
https://doi.org/10.1016/j.ascom.2022.100574
