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| Fältnamn | Indikatorer | Metadata |
|---|---|---|
| 000 | 10689naa a2201177 4500 | |
| 001 | oai:research.chalmers.se:7c5fc2c9-c7f4-4e93-ad19-745cab561e4c | |
| 003 | SwePub | |
| 008 | 171008s2016 | |||||||||||000 ||eng| | |
| 009 | oai:lup.lub.lu.se:a158e5f5-1416-42c0-b822-abb379ffbc13 | |
| 024 | 7 | a https://research.chalmers.se/publication/2456322 URI |
| 024 | 7 | a https://doi.org/10.1051/0004-6361/2015274022 DOI |
| 024 | 7 | a https://lup.lub.lu.se/record/a158e5f5-1416-42c0-b822-abb379ffbc132 URI |
| 040 | a (SwePub)cthd (SwePub)lu | |
| 041 | a engb eng | |
| 042 | 9 SwePub | |
| 072 | 7 | a for2 swepub-publicationtype |
| 072 | 7 | a ref2 swepub-contenttype |
| 100 | 1 | a Fotopoulou, S.u Université de Genève,University of Geneva4 aut |
| 245 | 1 0 | a The XXL Survey VI. The 1000 brightest X-ray point sources |
| 264 | c 2016-06-15 | |
| 264 | 1 | b EDP Sciences,c 2016 |
| 338 | a electronic2 rdacarrier | |
| 520 | a Context. X-ray extragalactic surveys are ideal laboratories for the study of the evolution and clustering of active galactic nuclei (AGN). Usually, a combination of deep and wide surveys is necessary to create a complete picture of the population. Deep X-ray surveys provide the faint population at high redshift, while wide surveys provide the rare bright sources. Nevertheless, very wide area surveys often lack the ancillary information available for modern deep surveys. The XXL survey spans two fields of a combined 50 deg(2) observed for more than 6Ms with XMM-Newton, occupying the parameter space that lies between deep surveys and very wide area surveys; at the same time it benefits from a wealth of ancillary data. Aims. This paper marks the first release of the XXL point source catalogue including four optical photometry bands and redshift estimates. Our sample is selected in the 2-10 keV energy band with the goal of providing a sizable sample useful for AGN studies. The limiting flux is F2-10 keV = 4.8 x 10(14) erg s(-1) cm(-2). Methods. We use both public and proprietary data sets to identify the counterparts of the X-ray point-like sources by means of a likelihood ratio test. We improve upon the photometric redshift determination for AGN by applying a Random Forest classification trained to identify for each object the optimal photometric redshift category (passive, star forming, starburst, AGN, quasi-stellar objects (QSO)). Additionally, we assign a probability to each source that indicates whether it might be a star or an outlier. We apply Bayesian analysis to model the X-ray spectra assuming a power-law model with the presence of an absorbing medium. Results. We find that the average unabsorbed photon index is = 1.85 +/- 0.40 while the average hydrogen column density is log i = 21.07 +/- 1.2 cm(-2). We find no trend of Gamma or N-H with redshift and a fraction of 26% absorbed sources (log N-H > 22) consistent with the literature on bright sources (log L-x > 44). The counterpart identification rate reaches 96.7% for sources in the northern field, 97.7% for the southern field, and 97.2% in total. The photometric redshift accuracy is 0.095 for the full XMM-XXL with 28% catastrophic outliers estimated on a sample of 339 sources. Conclusions. We show that the XXL-1000-AGN sample number counts extended the number counts of the COSMOS survey to higher fluxes and are fully consistent with the Euclidean expectation. We constrain the intrinsic luminosity function of AGN in the 2-10 keV energy band where the unabsorbed X-ray flux is estimated from the X-ray spectral fit up to z = 3. Finally, we demonstrate the presence of a supercluster size structure at redshift 0.14, identified by means of percolation analysis of the XXL-1000-AGN sample. The XXL survey, reaching a medium flux limit and covering a wide area, is a stepping stone between current deep fields and planned wide area surveys. | |
| 650 | 7 | a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe |
| 650 | 7 | a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng |
| 653 | a Astronomy & Astrophysics | |
| 653 | a V740 | |
| 653 | a P409 | |
| 653 | a MEDIUM-SENSITIVITY SURVEY | |
| 653 | a WIDE-FIELD SURVEY | |
| 653 | a RUCTURE | |
| 653 | a ASTRONOMY & ASTROPHYSICS | |
| 653 | a QUASAR | |
| 653 | a SUPERMASSIVE BLACK-HOLES | |
| 653 | a ACTIVE GALACTIC NUCLEI | |
| 653 | a STRUCTURE | |
| 653 | a LARGE-AREA SURVEY | |
| 653 | a X-rays: general | |
| 653 | a 1984 | |
| 653 | a galaxies: active | |
| 653 | a surveys | |
| 653 | a EVOT ML | |
| 653 | a SURVEY | |
| 653 | a P389 | |
| 653 | a catalogs | |
| 653 | a NEWTON SERENDIPITOUS SURVEY | |
| 653 | a LARGE-SCALE | |
| 653 | a LUMINOSITY FUNCTION | |
| 653 | a GALAXY REDSHIFT | |
| 653 | a V132 | |
| 653 | a GIS CATALOG PROJECT | |
| 653 | a Catalogs | |
| 653 | a Galaxies: active | |
| 653 | a Surveys | |
| 653 | a X-rays: general | |
| 700 | 1 | a Pacaud, F.u Universität Bonn,University of Bonn4 aut |
| 700 | 1 | a Paltani, S.u Université de Genève,University of Geneva4 aut |
| 700 | 1 | a Ranalli, P.u Lund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science,National Observatory of Athens4 aut0 (Swepub:lu)astr-pri |
| 700 | 1 | a Ramos-Ceja, M. E.u Universität Bonn,University of Bonn4 aut |
| 700 | 1 | a Faccioli, L.u Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA),The French Alternative Energies and Atomic Energy Commission (CEA),Saclay Nuclear Research Centre (CEA Saclay)4 aut |
| 700 | 1 | a Plionis, M.u National Observatory of Athens,Aristotelio Panepistimio Thessalonikis,Aristotle University of Thessaloniki,Instituto Nacional de Astrofísica, Óptica y Electrońica (INAOE),National Institute of Astrophysics, Optics and Electronics (INAOE)4 aut |
| 700 | 1 | a Adami, C.u Laboratoire d'Astrophysique de Marseille,Aix-Marseille University4 aut |
| 700 | 1 | a Bongiorno, A.u Osservatorio Astronomico di Roma,INAF-Osservatorio Astronomico di Roma4 aut |
| 700 | 1 | a Brusa, M.u Osservatorio Astronomico Di Bologna,Universita di Bologna,University of Bologna,INAF Osservatorio Astronomico di Bologna4 aut |
| 700 | 1 | a Chiappetti, L.u Istituto nazionale di astrofisica (INAF),INAF Institute of Space Astrophysics and Cosmic Physics of Milano4 aut |
| 700 | 1 | a Desai, S.u Ludwig-Maximilians-Universität München,Ludwig Maximilian University of Munich,Ludwig-Maximilian University of Munich4 aut |
| 700 | 1 | a Elyiv, A.u Universita di Bologna,University of Bologna,Main Astronomical Observatory Nasu,National Academy of Sciences of Ukraine4 aut |
| 700 | 1 | a Lidman, C.u Australian Astronomical Observatory4 aut |
| 700 | 1 | a Melnyk, O.u Taras Shevchenko National University of Kyiv,Sveučilište u Zagrebu,University of Zagreb,Macquarie University, Sydney4 aut |
| 700 | 1 | a Pierre, M.u Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA),The French Alternative Energies and Atomic Energy Commission (CEA),Saclay Nuclear Research Centre (CEA Saclay)4 aut |
| 700 | 1 | a Piconcelli, E.u Osservatorio Astronomico di Roma,INAF-Osservatorio Astronomico di Roma4 aut |
| 700 | 1 | a Vignali, C.u Universita di Bologna,University of Bologna,Osservatorio Astronomico Di Bologna,INAF Osservatorio Astronomico di Bologna4 aut |
| 700 | 1 | a Alis, S.u Istanbul Universitesi,Istanbul University,University of California, Davis4 aut |
| 700 | 1 | a Ardila, F.u University of Florida4 aut |
| 700 | 1 | a Arnouts, S.u Laboratoire d'Astrophysique de Marseille,Laboratoire d'Astrophysique de Marseille (LAM)4 aut |
| 700 | 1 | a Baldry, I.u Liverpool John Moores University4 aut |
| 700 | 1 | a Bremer, M.u University of Bristol4 aut |
| 700 | 1 | a Eckert, D.u Université de Genève,University of Geneva4 aut |
| 700 | 1 | a Guennou, L.u University of KwaZulu-Natal4 aut |
| 700 | 1 | a Horellou, Cathy,d 1967u Chalmers University of Technology4 aut0 (Swepub:cth)horellou |
| 700 | 1 | a Iovino, A.u Istituto nazionale di astrofisica (INAF),INAF Osservatorio Astronomico di Brera4 aut |
| 700 | 1 | a Koulouridis, E.u Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA),The French Alternative Energies and Atomic Energy Commission (CEA),National Observatory of Athens,Saclay Nuclear Research Centre (CEA Saclay)4 aut |
| 700 | 1 | a Liske, J.u Universität Hamburg,University of Hamburg4 aut |
| 700 | 1 | a Maurogordato, S.u Université Nice Sophia Antipolis (UNS),Université Nice Sophia Antipolis4 aut |
| 700 | 1 | a Menanteau, F.u University of Illinois,University of Illinois at Urbana-Champaign4 aut |
| 700 | 1 | a Mohr, J. J.u Ludwig-Maximilians-Universität München,Ludwig Maximilian University of Munich,Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Max Planck Institute for Extraterrestrial Physics,Ludwig-Maximilian University of Munich4 aut |
| 700 | 1 | a Owers, M.u Australian Astronomical Observatory,Macquarie University4 aut |
| 700 | 1 | a Poggianti, B.u Istituto nazionale di astrofisica (INAF),INAF - Osservatorio Astronomico di Padova4 aut |
| 700 | 1 | a Pompei, E.u European Southern Observatory Santiago4 aut |
| 700 | 1 | a Sadibekova, T.u Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA),The French Alternative Energies and Atomic Energy Commission (CEA),Saclay Nuclear Research Centre (CEA Saclay)4 aut |
| 700 | 1 | a Stanford, A.u University of California4 aut |
| 700 | 1 | a Tuffs, R.u Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Max Planck Institute for Nuclear Physics4 aut |
| 700 | 1 | a Willis, J.u University of Victoria4 aut |
| 710 | 2 | a Université de Genèveb University of Geneva4 org |
| 773 | 0 | t Astronomy and Astrophysicsd : EDP Sciencesg 592:A5q 592:A5x 0004-6361x 1432-0746 |
| 856 | 4 | u http://publications.lib.chalmers.se/records/fulltext/245632/local_245632.pdfx primaryx freey FULLTEXT |
| 856 | 4 | u https://www.aanda.org/articles/aa/pdf/2016/08/aa27402-15.pdf |
| 856 | 4 | u http://dx.doi.org/10.1051/0004-6361/201527402x freey FULLTEXT |
| 856 | 4 8 | u https://research.chalmers.se/publication/245632 |
| 856 | 4 8 | u https://doi.org/10.1051/0004-6361/201527402 |
| 856 | 4 8 | u https://lup.lub.lu.se/record/a158e5f5-1416-42c0-b822-abb379ffbc13 |
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