Search Results - "Joachimi, B."

KiDS-450: cosmological parameter constraints from tomographic weak gravitational lensing by Hildebrandt, H, Viola, M, Heymans, C, Joudaki, S, Kuijken, K, Blake, C, Erben, T, Joachimi, B, Klaes, D, Miller, L, Morrison, C B, Nakajima, R, Kleijn, G Verdoes, Amon, A, Choi, A, Covone, G, deJong, J T A, Dvornik, A, Conti, I Fenech, Grado, A, Harnois-Deraps, J, Herbonnet, R, Hoekstra, H, Kohlinger, F, McFarland, J, Mead, A, Merten, J, Napolitano, N, Peacock, J A, Radovich, M, Schneider, P, Simon, P, Valentijn, E A, van den Busch, J L, van Uitert, E, Van Waerbeke, L

“…We present cosmological parameter constraints from a tomographic weak gravitational lensing analysis of ~450 deg^sup 2^ of imaging data from the Kilo Degree…”
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KiDS + GAMA: constraints on horndeski gravity from combined large-scale structure probes by Spurio Mancini, A, Köhlinger, F, Joachimi, B, Pettorino, V, Schäfer, B M, Reischke, R, van Uitert, E, Brieden, S, Archidiacono, M, Lesgourgues, J

“…ABSTRACT We present constraints on Horndeski gravity from a combined analysis of cosmic shear, galaxy–galaxy lensing and galaxy clustering from $450\,…”
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On the probability distributions of ellipticity by Viola, M., Kitching, T. D., Joachimi, B.

“…In this paper we derive an exact full expression for the 2D probability distribution of the ellipticity of an object measured from data, only assuming Gaussian…”
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KiDS-450: the tomographic weak lensing power spectrum and constraints on cosmological parameters by Köhlinger, F., Viola, M., Joachimi, B., Hoekstra, H., van Uitert, E., Hildebrandt, H., Choi, A., Erben, T., Heymans, C., Joudaki, S., Klaes, D., Kuijken, K., Merten, J., Miller, L., Schneider, P., Valentijn, E. A.

“…Abstract We present measurements of the weak gravitational lensing shear power spectrum based on $450 \deg ^2$ of imaging data from the Kilo Degree Survey. We…”
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Dark matter halo properties of GAMA galaxy groups from 100 square degrees of KiDS weak lensing data by Viola, M., Cacciato, M., Brouwer, M., Kuijken, K., Hoekstra, H., Norberg, P., Robotham, A. S. G., van Uitert, E., Alpaslan, M., Baldry, I. K., Choi, A., de Jong, J. T. A., Driver, S. P., Erben, T., Grado, A., Graham, Alister W., Heymans, C., Hildebrandt, H., Hopkins, A. M., Irisarri, N., Joachimi, B., Loveday, J., Miller, L., Nakajima, R., Schneider, P., Sifón, C., Verdoes Kleijn, G.

“…The Kilo-Degree Survey is an optical wide-field survey designed to map the matter distribution in the Universe using weak gravitational lensing. In this paper,…”
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A direct measurement of tomographic lensing power spectra from CFHTLenS by Köhlinger, F., Viola, M., Valkenburg, W., Joachimi, B., Hoekstra, H., Kuijken, K.

“…We measure the weak gravitational lensing shear power spectra and their cross-power in two photometric redshift bins from the Canada–France–Hawaii Telescope…”
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The PAU Survey: early demonstration of photometric redshift performance in the COSMOS field by Eriksen, M, Alarcon, A, Gaztanaga, E, Amara, A, Cabayol, L, Carretero, J, Castander, F J, Crocce, M, Delfino, M, De Vicente, J, Fernandez, E, Fosalba, P, Garcia-Bellido, J, Hildebrandt, H, Hoekstra, H, Joachimi, B, Norberg, P, Miquel, R, Padilla, C, Refregier, A, Sanchez, E, Serrano, S, Sevilla-Noarbe, I, Tallada, P, Tonello, N, Tortorelli, L

“…Abstract The Physics of the Accelerating Universe Survey (PAUS) is an innovative photometric survey with 40 narrow-bands at the William Herschel Telescope…”
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RCSLenS: The Red Cluster Sequence Lensing Survey by Hildebrandt, H., Choi, A., Heymans, C., Blake, C., Erben, T., Miller, L., Nakajima, R., van Waerbeke, L., Viola, M., Buddendiek, A., Harnois-Déraps, J., Hojjati, A., Joachimi, B., Joudaki, S., Kitching, T. D., Wolf, C., Gwyn, S., Johnson, N., Kuijken, K., Sheikhbahaee, Z., Tudorica, A., Yee, H. K. C.

“…We present the Red Cluster Sequence Lensing Survey (RCSLenS), an application of the methods developed for the Canada–France–Hawaii Telescope Lensing Survey…”
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Intrinsic galaxy shapes and alignments - II. Modelling the intrinsic alignment contamination of weak lensing surveys by Joachimi, B., Semboloni, E., Hilbert, S., Bett, P. E., Hartlap, J., Hoekstra, H., Schneider, P.

“…Intrinsic galaxy alignments constitute the major astrophysical systematic of forthcoming weak gravitational lensing surveys but also yield unique insights into…”
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KiDS+2dFLenS+GAMA: testing the cosmological model with the EG statistic by Amon, A, Blake, C, Heymans, C, Leonard, C D, Asgari, M, Bilicki, M, Choi, A, Erben, T, Glazebrook, K, Harnois-Déraps, J, Hildebrandt, H, Hoekstra, H, Joachimi, B, Joudaki, S, Kuijken, K, Lidman, C, Loveday, J, Parkinson, D, Valentijn, E A, Wolf, C

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The PAU Survey: Photometric redshifts using transfer learning from simulations by Eriksen, M, Alarcon, A, Cabayol, L, Carretero, J, Casas, R, Castander, F J, De Vicente, J, Fernandez, E, Garcia-Bellido, J, Gaztanaga, E, Hildebrandt, H, Hoekstra, H, Joachimi, B, Miquel, R, Padilla, C, Sanchez, E, Sevilla-Noarbe, I, Tallada, P

“…ABSTRACT In this paper, we introduce the deepz deep learning photometric redshift (photo-z) code. As a test case, we apply the code to the PAU survey (PAUS)…”
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Intrinsic galaxy shapes and alignments - I. Measuring and modelling COSMOS intrinsic galaxy ellipticities by Joachimi, B., Semboloni, E., Bett, P. E., Hartlap, J., Hilbert, S., Hoekstra, H., Schneider, P., Schrabback, T.

“…The statistical properties of the ellipticities of galaxy images depend on how galaxies form and evolve, and therefore constrain models of galaxy morphology,…”
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Towards fast machine-learning-assisted Bayesian posterior inference of microseismic event location and source mechanism by Piras, D, Spurio Mancini, A, Ferreira, A M G, Joachimi, B, Hobson, M P

“…SUMMARY Bayesian inference applied to microseismic activity monitoring allows the accurate location of microseismic events from recorded seismograms and the…”
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Estimating cosmological parameter covariance by Taylor, A., Joachimi, B.

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Forecasts of non-Gaussian parameter spaces using Box-Cox transformations by Joachimi, B., Taylor, A. N.

“…Forecasts of statistical constraints on model parameters using the Fisher matrix abound in many fields of astrophysics. The Fisher matrix formalism involves…”
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Cosmological information in Gaussianized weak lensing signals by Joachimi, B., Taylor, A. N., Kiessling, A.

“…Gaussianizing the one-point distribution of the weak gravitational lensing convergence has recently been shown to increase the signal-to-noise ratio contained…”
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The PAU survey: photometric calibration of narrow band images by Castander, F J, Serrano, S, Eriksen, M, Gaztañaga, E, Casas, R, Alarcon, A, Bauer, A H, Fernández, E, Navarro-Gironés, D, Tonello, N, Cabayol, L, Carretero, J, De Vicente, J, Garcia-Bellido, J, Hildebrandt, H, Hoekstra, H, Joachimi, B, Miquel, R, Padilla, C, Renard, P, Sanchez, E, Sevilla-Noarre, I, Tallada-Crespí, P

“…ABSTRACT The physics of the accelerating Universe (PAU) camera is an optical narrow band and broad band imaging instrument mounted at the prime focus of the…”
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The Physics of the Accelerating Universe Survey: narrow-band image photometry by Serrano, S, Gaztañaga, E, Castander, F J, Eriksen, M, Casas, R, Navarro-Gironés, D, Alarcon, A, Bauer, A, Cabayol, L, Carretero, J, Fernandez, E, Neissner, C, Renard, P, Tallada-Crespí, P, Tonello, N, Sevilla-Noarbe, I, Crocce, M, García-Bellido, J, Hildebrandt, H, Hoekstra, H, Joachimi, B, Miquel, R, Padilla, C, Sánchez, E, de Vicente, J

“…ABSTRACT PAUCam is an innovative optical narrow-band imager mounted at the William Herschel Telescope built for the Physics of the Accelerating Universe Survey…”
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On the shear estimation bias induced by the spatial variation of colour across galaxy profiles by Semboloni, E., Hoekstra, H., Huang, Z., Cardone, V. F., Cropper, M., Joachimi, B., Kitching, T., Kuijken, K., Lombardi, M., Maoli, R., Mellier, Y., Miller, L., Rhodes, J., Scaramella, R., Schrabback, T., Velander, M.

“…The spatial variation of the colour of a galaxy may introduce a bias in the measurement of its shape if the point spread function (PSF) profile depends on…”
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sunglass: a new weak-lensing simulation pipeline by Kiessling, A., Heavens, A. F., Taylor, A. N., Joachimi, B.

“…A new cosmic shear analysis pipeline sunglass (Simulated UNiverses for Gravitational Lensing Analysis and Shear Surveys) is introduced. sunglass is a pipeline…”
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