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Two more, bright, z > 6 quasars from VST ATLAS and WISE

Autor: Chehade, B., Carnall, A. C., Shanks, T., Diener, C., Fumagalli, M., Findlay, J. R., Metcalfe, N., Hennawi, J., Leibler, C., Murphy, D. N. A., Prochaska, J. X., Irwin, M. J., Gonzalez-Solares, E.

Recently, Carnall et al. discovered two bright high redshift quasars using the combination of the VST ATLAS and WISE surveys. The technique involved using the 3-D colour plane i-z:z-W1:W1-W2 with the WISE W1 (3.4 micron) and W2 (4.5 micron) bands tak

Externí odkaz: http://arxiv.org/abs/1803.01424

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Quasar lenses and pairs in the VST-ATLAS and Gaia

Autor: Agnello, A., Schechter, P. L., Morgan, N. D., Treu, T., Grillo, C., Malesani, D., Anguita, T., Apostolovski, Y., Rusu, C. E., Motta, V., Rojas, K., Chehade, B., Shanks, T.

We report on discovery results from a quasar lens search in the ATLAS public footprint, extending quasar lens searches to a regime without $u-$band or fiber-spectroscopic information, using a combination of data mining techniques on multi-band catalo

Externí odkaz: http://arxiv.org/abs/1711.07492

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First lensed quasar systems from the VST-ATLAS survey: one quad, two doubles and two pairs of lensless twins

Autor: Schechter, Paul L., Morgan, Nicholas D., Chehade, B., Metcalfe, N., Shanks, T., McDonald, Michael

We have analyzed images from the VST ATLAS survey to identify candidate gravitationally lensed quasar systems in a sample of WISE sources with W1 - W2 > 0.7. Results from followup spectroscopy with the Baade 6.5 m telescope are presented for eight sy

Externí odkaz: http://arxiv.org/abs/1607.07476

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Two bright z > 6 quasars from VST ATLAS and a new method of optical plus mid-infra-red colour selection

Autor: Carnall, A. C., Shanks, T., Chehade, B., Fumagalli, M., Rauch, M., Irwin, M. J., Gonzalez-Solares, E., Findlay, J. R., Metcalfe, N.

We present the discovery of two z > 6 quasars, selected as i band dropouts in the VST ATLAS survey. Our first quasar has redshift, z = 6.31 \pm 0.03, z band magnitude, z_AB = 19.63 \pm 0.08 and rest frame 1450A absolute magnitude, M_1450 = -27.8 \pm

Externí odkaz: http://arxiv.org/abs/1502.07748

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The VLT Survey Telescope ATLAS

Autor: Shanks, T., Metcalfe, N., Chehade, B., Findlay, J. R., Irwin, M. J., Gonzalez-Solares, E., Lewis, J. R., Yoldas, A. Kupcu, Mann, R. G., Read, M. A., Sutorius, E. T. W., Voutsinas, S.

The VLT Survey Telescope (VST) ATLAS is an optical ugriz survey aiming to cover ~4700deg^2 of the Southern sky to similar depths as the Sloan Digital Sky Survey (SDSS). From reduced images and object catalogues provided by the Cambridge Astronomical

Externí odkaz: http://arxiv.org/abs/1502.05432

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Akademický článek

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Tropical forest biomass retrieval using P-band PolTomSAR data

Autor: Chehade, B. E. H., Ferro-Famil, L., Dinh, H. T. M., Le Toan, T., STEFANO TEBALDINI

Publikováno v: Proceedings of EUSAR 2016: 11th European Conference on Synthetic Aperture Radar
Proceedings of EUSAR 2016: 11th European Conference on Synthetic Aperture Radar, 2016, Hamburg, Germany. pp.1-4
Proceedings of the POLinSAR 2015 Workshop
POLinSAR 2015 Workshop
POLinSAR 2015 Workshop, Jan 2015, Frascati, Italy
Scopus-Elsevier

International audience; This paper investigates the ability of Polarimetric SAR Tomography (PolTomSAR), performed at P-band, to retrieve Above-Ground-Biomass (AGB) over dense tropical forests. PolTomSAR techniques allow an accurate estimation of the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::c64bd54bdef31f7113230ad479ddcf54
https://hal.archives-ouvertes.fr/hal-01403177

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