ROSAT observations of ten globular clusters with large core radii.

Astronomy and Astrophysics – Astrophysics

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Globular Clusters: General, X-Rays: Stars

Scientific paper

We present X-ray observations of ten globular clusters observed with the Rosat PSPC. The clusters were chosen to have large core radii and to be nearby. Three clusters contain X-ray sources which are probably associated with the cluster. One is the previously discovered X-ray transient H1825-331 in NGC 6652. The other two, in NGC 6366 and NGC 6809, are new members of the class of low-luminosity sources, with luminosities in the region of 10^32^erg/s. Upper limits can be placed on the source temperatures of both sources, making them similar to sources found in other globular clusters by Rosat .

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