ROSAT Observations of Nine Globular Clusters

Details ROSAT Observations of Nine Globular Clusters ROSAT Observations of Nine Globular Clusters

Mar 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...423..633r&link_type=abstract

Astrophysical Journal v.423, p.633

Astronomy and Astrophysics

Astronomy

14

Galaxy: Globular Clusters: General, Stars: Binaries: General, X-Rays: General

Scientific paper

The ROSAT HRI was used to image fields around nine Galactic globular clusters that have central densities in the range of 104-105 Msun pc-3 and that had not previously been observed with the Einstein Observatory. We detected X-ray sources associated with Pal 2 and NGC 6304 with luminosities of 1.1 × 1034 ergs s-1 and 1.2 × 1033 ergs s-1, respectively. No X-ray emission was detected from the source in Ter 6, thus confirming its transient nature. In all, there were 23 serendipitous sources found in the nine fields; none was apparently associated with any of the other seven clusters. The results are discussed in the context of low-luminosity cluster X-ray sources, in general.

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