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Jean Surdej

Researcher at University of Liège

Publications -  436
Citations -  32465

Jean Surdej is an academic researcher from University of Liège. The author has contributed to research in topics: Light curve & Gravitational microlensing. The author has an hindex of 60, co-authored 422 publications receiving 27563 citations. Previous affiliations of Jean Surdej include Chinese Academy of Sciences & University of Göttingen.

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Gaia Data Release 2. Summary of the contents and survey properties

Anthony G. A. Brown, +452 more
TL;DR: The second Gaia data release, Gaia DR2 as mentioned in this paper, is a major advance with respect to Gaia DR1 in terms of completeness, performance, and richness of the data products.
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The Gaia mission

T. Prusti, +624 more
TL;DR: Gaia as discussed by the authors is a cornerstone mission in the science programme of the European Space Agency (ESA). The spacecraft construction was approved in 2006, following a study in which the original interferometric concept was changed to a direct-imaging approach.
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Gaia Data Release 1 Summary of the astrometric, photometric, and survey properties

Anthony G. A. Brown, +590 more
TL;DR: The first Gaia data release, Gaia DR1 as discussed by the authors, consists of three components: a primary astrometric data set which contains the positions, parallaxes, and mean proper motions for about 2 million of the brightest stars in common with the Hipparcos and Tycho-2 catalogues.
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Spectral Energy Distributions of Hard X-ray selected AGNs in the XMDS Survey

TL;DR: In this article, the spectral energy distributions (SEDs) of a hard X-ray selected sample were derived based on a SED fitting technique, and the authors identified AGN signatures in 83% of the objects.