The XXL survey: First results and future

M. Pierre*, C. Adami, M. Birkinshaw, L. Chiappetti, S. Ettori, A. Evrard, L. Faccioli, F. Gastaldello, P. Giles, C. Horellou, A. Iovino, E. Koulouridis, C. Lidman, A. Le Brun, B. Maughan, S. Maurogordato, I. McCarthy, S. Miyazaki, F. Pacaud, S. PaltaniM. Plionis, T. Reiprich, T. Sadibekova, V. Smolcic, S. Snowden, J. Surdej, M. Tsirou, C. Vignali, J. Willis, S. Alis, B. Altieri, N. Baran, C. Benoist, A. Bongiorno, M. Bremer, A. Cappi, C. Caretta, P. Ciliegi, N. Clerc, P. S. Corasaniti, J. Coupon, J. Delhaize, I. Delvecchio, J. Democles, Sh Desai, J. Devriendt, Y. Dubois, D. Eckert, A. Elyiv, A. Farahi, C. Ferrari, S. Fotopoulou, W. Forman, I. Georgantopoulos, V. Guglielmo, M. Huynh, N. Jerlin, Ch Jones, S. Lavoie, J. -P. Le Fevre, M. Lieu, M. Kilbinger, F. Marulli, A. Mantz, S. McGee, J. -B. Melin, O. Melnyk, L. Moscardini, M. Novak, E. Piconcelli, B. Poggianti, D. Pomarede, E. Pompei, T. Ponman, M. E. Ramos Ceja, P. Ranalli, D. Rapetti, S. Raychaudhury, M. Ricci, H. Rottgering, M. Sahlén, J. -L. Sauvageot, C. Schimd, M. Sereno, G. P. Smith, K. Umetsu, P. Valageas, A. Valotti, I. Valtchanov, A. Veropalumbo, B. Ascaso, D. Barnes, M. De Petris, F. Durret, M. Donahue, M. Ithana, M. Jarvis, M. Johnston-Hollitt, E. Kalfountzou, S. Kay, F. La Franca, N. Okabe, A. Muzzin, A. Rettura, F. Ricci, J. Ridl, G. Risaliti, M. Takizawa, P. Thomas, N. Truong

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

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The XXL survey currently covers two 25deg2 patches with XMM observations of ∼10ks. We summarize the scientific results associated with the first release of the XXL dataset, which occurred in mid-2016. We review several arguments for increasing the survey depth to 40ks during the next decade of XMM operations. X-ray (z<2) cluster, (z<4) active galactic nuclei (AGN), and cosmic background survey science will then benefit from an extraordinary data reservoir. This, combined with deep multi-λ observations, will lead to solid standalone cosmological constraints and provide a wealth of information on the formation and evolution of AGN, clusters, and the X-ray background. In particular, it will offer a unique opportunity to pinpoint the z>1 cluster density. It will eventually constitute a reference study and an ideal calibration field for the upcoming eROSITA and Euclid missions.

Original languageEnglish
Pages (from-to)334–341
Number of pages8
JournalAstronomische Nachrichten
Issue number2-3
Early online date29 Mar 2017
Publication statusPublished - Mar 2017

Bibliographical note

Proceedings of the XMM Next Decade Workshop held at ESAC, 9-11 May 2016.


  • Cosmological parameters
  • Galaxies: active
  • Galaxies: clusters: general
  • X-ray: general


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