![]() ![]() Open Access funding provided by Max Planck Society. Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License ( ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Together with the catalogues of primary and secondary counterparts to the main and hard samples of the eFEDS survey, this paper releases their multi-wavelength properties and redshifts. This paper accompanies the eROSITA early data release of all the observations performed during the performance and verification phase. The photometric redshifts are most reliable within the KiDS/VIKING area, where deep near-infrared data are also available.Ĭonclusions. Inspection of the distributions of the X-ray sources in various optical/IR colour-magnitude spaces reveal a rich variety of diverse classes of objects. For about 340 of the extragalactic sources, we cannot rule out the possibility that they are unresolved clusters or belong to clusters. By means of reliable spectra, Gaia parallaxes, and/or multi-wavelength properties, we have classified the reliable counterparts in both samples into Galactic (2695) and extragalactic sources (22 079). Of the eFEDS sources, 24 774 of 27 369 have reliable counterparts (90.5%) in the main sample and 231 of 246 sourcess (93.9%) have counterparts in the hard sample, including 2514 (3) sources for which a second counterpart is equally likely. Then spectroscopic redshifts and photometry from ancillary surveys were collated to compute photometric redshifts. To identifyy the counterparts, we combined the results from two independent methods ( NWAY and ASTROMATCH), trained on the multi-wavelength properties of a sample of 23k XMM-Newton sources detected in the DESI Legacy Imaging Survey DR8. This paper presents the identification of the counterparts to the point sources detected in eFEDS in the main and hard samples and their multi-wavelength properties, including redshift. During the SRG performance verification phase, eROSITA observed a contiguous 140 deg 2 area of the sky down to the final depth of the eROSITA all-sky survey (eROSITA Final Equatorial-Depth Survey eFEDS), with the goal of obtaining a census of the X-ray emitting populations (stars, compact objects, galaxies, clusters of galaxies, and active galactic nuclei) that will be discovered over the entire sky.Īims. After the four-year survey program, it will reach a flux limit that is about 25 times deeper than ROSAT. In November 2019, eROSITA on board of the Spektrum-Roentgen-Gamma (SRG) observatory started to map the entire sky in X-rays. Instituto de Astronomia Ensenada, Universidad Nacional Autónoma de Mexico,įrontier Research Institute for Interdisciplinary Sciences, Tohoku University,Īstronomical Institute, Tohoku University,ĭepartment of Physics and Astronomy, University of Utah,Ĭentro de Investigación en Astronomia, Universidad Bernardo O’Higgins,Īpache Point Observatory and New Mexico State University,Ĭentro de Astronomia (CITEVA), Universidad de Antofagasta,Ĭontext. Institute for Gravitation and the Cosmos, The Pennsylvania State University,ĭepartment of Physics, 104 Davey Laboratory, The Pennsylvania State University,ĭepartment of Physics and Yale Center for Astronomy and Astrophysics, Yale University, Institute for Advanced Research, Nagoya University Furocho, Chikusa-ku,įaculty of Physics, Ludwig-Maximilians-Universität,ĭepartment of Astronomy, University of Washington,ĭepartment of Astronomy, University of Illinois at Urbana-Champaign,ĭepartment of Physics, University of Connecticut,ĭepartment of Astronomy and Astrophysics, 525 Davey Lab, The Pennsylvania State University, Universität Hamburg, Hamburger Sternwarte, Leibniz-Institut für Astrophysik Potsdam (AIP)., Research Center for Space and Cosmic Evolution, Ehime University, 2–5 Bunkyo-cho, Matsuyama, INAF – Osservatorio di Astrofisica e Scienza dello Spazio di Bologna,ĭepartment of Astronomy, Kyoto University, Kitashirakawa-Oiwake-cho,Īcademia Sinica Institute of Astronomy and Astrophysics, Institute for Astronomy and Astrophysics, National Observatory of Athens,ĭipartimento di Fisica e Astronomia “Augusto Righi”, Università di Bologna, Max-Planck-Institut für extraterrestrische Physik, Astronomical objects: linking to databases.Including author names using non-Roman alphabets.Suggested resources for more tips on language editing in the sciences Punctuation and style concerns regarding equations, figures, tables, and footnotes
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