ROSAT OBSERVATIONS OF 9 GLOBULAR-CLUSTERS

Citation
S. Rappaport et al., ROSAT OBSERVATIONS OF 9 GLOBULAR-CLUSTERS, The Astrophysical journal, 423(2), 1994, pp. 633-639
Citations number
46
Categorie Soggetti
Astronomy & Astrophysics
Journal title
ISSN journal
0004637X
Volume
423
Issue
2
Year of publication
1994
Part
1
Pages
633 - 639
Database
ISI
SICI code
0004-637X(1994)423:2<633:ROO9G>2.0.ZU;2-0
Abstract
The ROSAT HRI was used to image fields around nine Galactic globular c lusters that ave central densities in the range of 10(4)-10(5) M. pc-3 and that had not previously been observed with the Einstein Observato ry. We detected X-ray sources associated with Pal 2 and NGC 6304 with luminosities of 1.1 X 10(34) ergs s-1 and 1.2 x 10(33) ergs s-1, respe ctively. 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 cont ext of low-luminosity cluster X-ray sources, in general.