Accueil > Séminaires d’Astrophysique > The Population of Variable X-ray Sources in the Second XMM-Newton Serendipitous Source Catalogue (2XMM)

 

The Population of Variable X-ray Sources in the Second XMM-Newton Serendipitous Source Catalogue (2XMM)

Sean Farrell (Université de Leicester, Angleterre)

Par Stephane Charpinet - 26/02/2009

 

Séminaires d’Astrophysique

de l’Observatoire Midi-Pyrénées


Séminaire de

Sean FARRELL

(Université de Leicester, Angleterre)

Jeudi 5 Mars 2009 à 11h

CESR


The Population of Variable X-ray Sources in the Second XMM-Newton Serendipitous Source Catalogue (2XMM)

The Second XMM-Newton Serendipitous Source Catalogue ­ 2XMM ­ is the largest X-ray source catalogue ever produced, containing 221 012 discrete sources. The latest version of 2XMM contains 2 267 unique variable sources. We have examined the images, light curves and spectra and performed a search of the literature in order to identify the nature of each of these sources. Using these source identifications we have performed population studies of the major source categories ­ X-ray emitting stars, AGN, X-ray binaries and cataclysmic variables. I will present the results of each of these studies, and will show how these results allow for the identification and sub-classification of new sources based on the spectral hardness information contained in the catalogue. A major result is the identification of a distinct delineation between neutron star and black hole X-ray binaries on the hardness ratio plots, which allows us to speculatively identify four globular cluster X-ray sources in M31as black hole X-ray binaries.

 

 

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Laboratoire Astrophysique de Toulouse - Tarbes (UMR5572)

CNRS (Midi-Pyrénées)

Univ. Paul Sabatier

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