The XMM-LSS catalogue: X-ray sources and associated optical data. Version I

• Published in: Monthly notices of the Royal Astronomical Society 2007, Vol.tmp
• Main Authors: Pierre, M., Chiappetti, L., Pacaud, F., Gueguen, A., Libbrecht, C., Altieri, B., Aussel, H., Gandhi, P., Garcet, O., Gosset, E., Paioro, L., Ponman, T. J., Read, A. M., Refregier, A., Starck, Jean-Luc, Surdej, J., Valtchanov, I., Adami, C., Alloin, D., Alshino, A., Andreon, S., Birkinshaw, M., Bremer, M., Detal, A., Duc, P. -A., Galaz, G., Jones, L., Fèvre, J. -P. Le, Fèvre, O. Le, Maccagni, D., Mazure, A., Quintana, H., Röttgering, H. J. A., Sprimont, P. -G., Tasse, C., Trinchieri, G., Willis, J. P.
• Format: Article
• Language: English
• Subjects: Astrophysics; Cosmology and Extra-Galactic Astrophysics; Physics
• ISSN: 0035-8711; 1365-2966

Following the presentation of the XMM-LSS X-ray source detection package by Pacaud et al., we provide the source lists for the first 5.5 surveyed square degrees. The catalogues pertain to the [0.5-2] and [2-10] keV bands and contain in total 3385 point-like or extended sources above a detection likelihood of 15 in either band. The agreement with deep logN-logS is excellent. The main parameters considered are position, countrate, source extent with associated likelihood values. A set of additional quantities such as astrometric corrections and fluxes are further calculated while errors on the position and countrate are deduced from simulations. We describe the construction of the band-merged catalogue allowing rapid sub-sample selection and easy cross-correlation with external multi-wavelength catalogues. A small optical CFHTLS multi-band subset of objects is associated wich each source along with an X-ray/optical overlay. We make the full X-ray images available in FITS format. The data are available at CDS and, in a more extended form, at the Milan XMM-LSS database.