Search Results - "Refregier, A"

Shapelets — I. A method for image analysis by Refregier, Alexandre

“…We present a new method for the analysis of images, a fundamental task in observational astronomy. It is based on the linear decomposition of each object in…”
Get full text

Towards a full wCDM map-based analysis for weak lensing surveys by Zürcher, D, Fluri, J, Ajani, V, Fischbacher, S, Refregier, A, Kacprzak, T

“…ABSTRACT The next generation of weak lensing surveys will measure the matter distribution of the local universe with unprecedented precision, allowing the…”
Get full text

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…”
Get full text

FAst STatistics for weak Lensing (FASTLens): fast method for weak lensing statistics and map making by Pires, S., Starck, J.-L., Amara, A., Teyssier, R., Réfrégier, A., Fadili, J.

“…With increasingly large data sets, weak lensing measurements are able to measure cosmological parameters with ever-greater precision. However, this increased…”
Get full text

Cosmic shear requirements on the wavelength dependence of telescope point spread functions by Cypriano, E. S., Amara, A., Voigt, L. M., Bridle, S. L., Abdalla, F. B., Réfrégier, A., Seiffert, M., Rhodes, J.

“…Cosmic shear requires high precision measurement of galaxy shapes in the presence of the observational point spread function (PSF) that smears out the image…”
Get full text

Measurement and calibration of noise bias in weak lensing galaxy shape estimation by Kacprzak, Tomasz, Zuntz, Joe, Rowe, Barnaby, Bridle, Sarah, Refregier, Alexandre, Amara, Adam, Voigt, Lisa, Hirsch, Michael

“…Abstract Weak gravitational lensing has the potential to constrain cosmological parameters to high precision. However, as shown by the Shear Testing Programmes…”
Get full text

The PAU Survey: spectral features and galaxy clustering using simulated narrow-band photometry by Stothert, L, Norberg, P, Baugh, C M, Alarcon, A, Amara, A, Carretero, J, Castander, F J, Eriksen, M, Fernandez, E, Fosalba, P, Garcia-Bellido, J, Gaztanaga, E, Hoekstra, H, Padilla, C, Refregier, A, Sanchez, E, Tortorelli, L

Get full text

The Dark UNiverse Explorer (DUNE): proposal to ESA’s cosmic vision by Refregier, A.

“…The Dark UNiverse Explorer (DUNE) is a wide-field space imager whose primary goal is the study of dark energy and dark matter with unprecedented precision. For…”
Get full text

Cross-correlation of gravitational lensing from DES Science Verification data with SPT and Planck lensing by Kirk, D., Omori, Y., Benoit-Lévy, A., Cawthon, R., Chang, C., Larsen, P., Amara, A., Bacon, D., Crawford, T. M., Dodelson, S., Fosalba, P., Giannantonio, T., Holder, G., Jain, B., Kacprzak, T., Lahav, O., MacCrann, N., Nicola, A., Refregier, A., Sheldon, E., Story, K. T., Troxel, M. A., Vieira, J. D., Vikram, V., Zuntz, J., Abbott, T. M. C., Abdalla, F. B., Becker, M. R., Benson, B. A., Bernstein, G. M., Bernstein, R. A., Bleem, L. E., Bonnett, C., Bridle, S. L., Brooks, D., Buckley-Geer, E., Burke, D. L., Capozzi, D., Carlstrom, J. E., Rosell, A. Carnero, Kind, M. Carrasco, Carretero, J., Crocce, M., Cunha, C. E., D'Andrea, C. B., da Costa, L. N., Desai, S., Diehl, H. T., Dietrich, J. P., Doel, P., Eifler, T. F., Evrard, A. E., Flaugher, B., Frieman, J., Gerdes, D. W., Goldstein, D. A., Gruen, D., Gruendl, R. A., Honscheid, K., James, D. J., Jarvis, M., Kent, S., Kuehn, K., Kuropatkin, N., Lima, M., March, M., Martini, P., Melchior, P., Miller, C. J., Miquel, R., Nichol, R. C., Ogando, R., Plazas, A. A., Reichardt, C. L., Roodman, A., Rozo, E., Rykoff, E. S., Sako, M., Sanchez, E., Scarpine, V., Schubnell, M., Sevilla-Noarbe, I., Simard, G., Smith, R. C., Soares-Santos, M., Sobreira, F., Suchyta, E., Swanson, M. E. C., Tarle, G., Thomas, D., Wechsler, R. H., Weller, J.

“…We measure the cross-correlation between weak lensing of galaxy images and of the cosmic microwave background (CMB). The effects of gravitational lensing on…”
Get full text

MODELING THE TRANSFER FUNCTION FOR THE DARK ENERGY SURVEY by Chang, C, Busha, M T, Wechsler, R H, Refregier, A, Amara, A, Rykoff, E, Becker, M R, Bruderer, C, Gamper, L, Leistedt, B

“…We present a forward-modeling simulation framework designed to model the data products from the Dark Energy Survey (DES). This forward-model process can be…”
Get full text

A catalogue of structural and morphological measurements for DES Y1 by Tarsitano, F, Hartley, W G, Amara, A, Bluck, A, Bruderer, C, Carollo, M, Conselice, C, Melchior, P, Moraes, B, Refregier, A, Sevilla-Noarbe, I, Woo, J, Abbott, T M C, Allam, S, Annis, J, Avila, S, Banerji, M, Bertin, E, Brooks, D, Burke, D L, Carnero Rosell, A, Carrasco Kind, M, Carretero, J, Cunha, C E, D’Andrea, C B, da Costa, L N, Davis, C, De Vicente, J, Desai, S, Doel, P, Estrada, J, Frieman, J, García-Bellido, J, Gruen, D, Gruendl, R A, Gutierrez, G, Hollowood, D, Honscheid, K, James, D J, Jeltema, T, Krause, E, Kuehn, K, Kuropatkin, N, Lahav, O, Maia, M A G, Menanteau, F, Miquel, R, Plazas, A A, Romer, A K, Roodman, A, Sanchez, E, Santiago, B, Schindler, R, Smith, M, Smith, R C, Soares-Santos, M, Sobreira, F, Suchyta, E, Swanson, M E C, Tarle, G, Thomas, D, Vikram, V, Walker, A R

“…We present a structural and morphological catalogue for 45 million objects selected from the first year data of the Dark Energy Survey (DES). Single Sérsic…”
Get full text

Weak Gravitational Lensing with COSMOS: Galaxy Selection and Shape Measurements by Leauthaud, A., Massey, R., Kneib, J.P., Rhodes, J., Johnston, David E., Capak, P., Heymans, C., Ellis, Richard S., Koekemoer, Anton M., Fevre O., Le, Mellier, Y., Refregier, A., Robin, Annie C., Scoville, N., Tasca, L., Taylor, James E., Waerbeke, Ludovic Van

Get full text

Intrinsic correlation of galaxy shapes: implications for weak lensing measurements by Heavens, Alan, Refregier, Alexandre, Heymans, Catherine

“…Weak gravitational lensing is now established as a powerful method to measure mass fluctuations in the universe. It relies on the measurement of small coherent…”
Get full text

Shapelets — II. A method for weak lensing measurements by Refregier, Alexandre, Bacon, David

“…Weak gravitational lensing provides a unique method to directly measure the distribution of mass in the Universe. Because the distortions induced by lensing in…”
Get full text

Inference from the small scales of cosmic shear with current and future Dark Energy Survey data by MacCrann, N, Aleksic, J, Amara, A, Bridle, S L, Bruderer, C, Chang, C, Dodelson, S, Eifler, T F, Huff, E M, Huterer, D, Kacprzak, T, Refregier, A, Suchyta, E, Wechsler, R H, Zuntz, J, C Abbott, T M, Allam, S, Annis, J, Armstrong, R, Benoit-Levy, A, Brooks, D, Burke, D L, Rosell, A Carnero, Kind, M Carrasco, Carretero, J, Castander, F J, Crocce, M, Cunha, C E, da Costa, L N, Desai, S, Diehl, H T, Dietrich, J P, Doel, P, Evrard, A E, Flaugher, B, Fosalba, P, Gerdes, D W, Goldstein, D A, Gruen, D, Gruendl, R A, Gutierrez, G, Honscheid, K, James, D J, Jarvis, M, Krause, E, Kuehn, K, Kuropatkin, N, Lima, M, Marshall, J L, Melchior, P, et. al

“…Cosmic shear is sensitive to fluctuations in the cosmological matter density field, including on small physical scales, where matter clustering is affected by…”
Get full text

Cosmic shear systematics: software–hardware balance by Amara, A., Réfrégier, A., Paulin-Henriksson, S.

“…Cosmic shear measurements rely on our ability to measure and correct the point spread function (PSF) of the observations. This PSF is measured using stars in…”
Get full text

The XMM Large-Scale Structure survey: the X-ray pipeline and survey selection function by Pacaud, F., Pierre, M., Refregier, A., Gueguen, A., Starck, J.-L., Valtchanov, I., Read, A. M., Altieri, B., Chiappetti, L., Gandhi, P., Garcet, O., Gosset, E., Ponman, T. J., Surdej, J.

“…We present the X-ray pipeline developed for the purpose of the cluster search in the XMM Large-Scale Structure (XMM-LSS) survey. It is based on a two-stage…”
Get full text

Cosmological systematics beyond nuisance parameters: form-filling functions by Kitching, T. D., Amara, A., Abdalla, F. B., Joachimi, B., Refregier, A.

“…In the absence of any compelling physical model, cosmological systematics are often misrepresented as statistical effects and the approach of marginalizing…”
Get full text

The XMM-Large Scale Structure catalogue: X-ray sources and associated optical data. Version I by Pierre, M., Chiappetti, L., Pacaud, F., Gueguen, A., Libbrecht, C., Altieri, B., Aussel, H., Gandhi, P., Garcet, O., Gosset, E., Paioro, L., Ponman, T. J., Read, A. M., Refregier, A., Starck, J.-L., Surdej, J., Valtchanov, I., Adami, C., Alloin, D., Alshino, A., Andreon, S., Birkinshaw, M., Bremer, M., Detal, A., Duc, P.-A., Galaz, G., Jones, L., Le Fèvre, J.-P., Le Fèvre, O., Maccagni, D., Mazure, A., Quintana, H., Röttgering, H. J. A., Sprimont, P.-G., Tasse, C., Trinchieri, G., Willis, J. P.

“…Following the presentation of the XMM-Large Scale Structure (XMM-LSS) survey X-ray source detection package by Pacaud et al., we provide the source lists for…”
Get full text

SPOKES: An end-to-end simulation facility for spectroscopic cosmological surveys by Nord, B., Amara, A., Réfrégier, A., Gamper, La, Gamper, Lu, Hambrecht, B., Chang, C., Forero-Romero, J.E., Serrano, S., Cunha, C., Coles, O., Nicola, A., Busha, M., Bauer, A., Saunders, W., Jouvel, S., Kirk, D., Wechsler, R.

“…The nature of dark matter, dark energy and large-scale gravity pose some of the most pressing questions in cosmology today. These fundamental questions require…”
Get full text