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The XXL Survey: I. Scientific motivations - XMM-Newton observing plan - Follow-up observations and simulation programme

Pierre, M and Pacaud, F and Adami, C and Alis, S and Altieri, B and Baran, B and Benoist, C and Birkinshaw, M and Bongiorno, A and Bremer, MN and Brusa, M and Butler, A and Ciliegi, P and Chiappetti, L and Clerc, N and Corasaniti, PS and Coupon, J and Breuck, CD and Democles, J and Desai, S and Delhaize, J and Devriendt, J and Dubois, Y and Eckert, D and Elyiv, A and Ettori, S and Evrard, A and Faccioli, L and Farahi, A and Ferrari, C and Finet, F and Fotopoulou, S and Fourmanoit, N and Gandhi, P and Gastaldello, F and Gastaud, R and Georgantopoulos, I and Giles, P and Guennou, L and Guglielmo, V and Horellou, C and Husband, K and Huynh, M and Iovino, A and Kilbinger, M and Koulouridis, E and Lavoie, S and Brun, AMCL and Fevre, JPL and Lidman, C and Lieu, M and Lin, CA and Mantz, A and Maughan, BJ and Maurogordato, S and McCarthy, IG and McGee, S and Melin, JB and Melnyk, O and Menanteau, F and Novak, M and Paltani, S and Plionis, M and Poggianti, BM and Pomarede, D and Pompei, E and Ponman, TJ and Ramos-Ceja, ME and Ranalli, P and Rapetti, D and Raychaudury, S and Reiprich, TH and Rottgering, H and Rozo, E and Rykoff, E and Sadibekova, T and Santos, J and Sauvageot, JL and Schimd, C and Sereno, M and Smith, GP and Smolčić, V and Snowden, S and Spergel, D and Stanford, S and Surdej, J and Valageas, P and Valotti, A and Valtchanov, I and Vignali, C and Willis, J and Ziparo, F (2015) The XXL Survey: I. Scientific motivations - XMM-Newton observing plan - Follow-up observations and simulation programme. Astronomy and Astrophysics. ISSN 0004-6361

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Abstract

We present the XXL Survey, the largest XMM programme totaling some 6.9 Ms to date and involving an international consortium of roughly 100 members. The XXL Survey covers two extragalactic areas of 25 deg2 each at a point-source sensitivity of ~ 5E-15 erg/sec/cm2 in the [0.5-2] keV band (completeness limit). The survey's main goals are to provide constraints on the dark energy equation of state from the space-time distribution of clusters of galaxies and to serve as a pathfinder for future, wide-area X-ray missions. We review science objectives, including cluster studies, AGN evolution, and large-scale structure, that are being conducted with the support of approximately 30 follow-up programmes. We describe the 542 XMM observations along with the associated multi-lambda and numerical simulation programmes. We give a detailed account of the X-ray processing steps and describe innovative tools being developed for the cosmological analysis. The paper provides a thorough evaluation of the X-ray data, including quality controls, photon statistics, exposure and background maps, and sky coverage. Source catalogue construction and multi-lambda associations are briefly described. This material will be the basis for the calculation of the cluster and AGN selection functions, critical elements of the cosmological and science analyses. The XXL multi-lambda data set will have a unique lasting legacy value for cosmological and extragalactic studies and will serve as a calibration resource for future dark energy studies with clusters and other X-ray selected sources. With the present article, we release the XMM XXL photon and smoothed images along with the corresponding exposure maps. The XMM XXL observation list (Table B.1) is available in electronic form at the CDS. The present paper is the first in a series reporting results of the XXL-XMM survey.

Item Type: Article
Uncontrolled Keywords: astro-ph.CO; astro-ph.CO; astro-ph.HE
Subjects: Q Science > QB Astronomy
Divisions: Astrophysics Research Institute
Publisher: EDP Sciences
Related URLs:
Date Deposited: 07 Jan 2016 12:58
Last Modified: 31 Mar 2016 09:19
URI: http://researchonline.ljmu.ac.uk/id/eprint/2528

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