XXL is an international project based around an XMM Very Large Programme surveying two 25 deg2 extragalactic fields at a depth of ~6 x 10-15 erg cm-2 s-1 in the [0.5-2] keV band for point-like sources.
The XXL website is Multi-band information and spectroscopic follow-up of the X-ray sources are obtained through a number of survey programmes, summarised at

*** Append here any specific observatory acknowledgements (XMM, ESO, CFHT, etc.) pertaining to the data used in the paper in question, as well as acknowledgements to the relevant funding agencies. ***







#3289 - Last update : 10/04 2021


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