Detection of X-ray bursts in the globular cluster NGC 6652
Abstract
Two type I X-ray bursts were detected from a position consistent with the transient X-ray source in NGC 6652 with the Wide Field Camera of the BeppoSAX satellite, strongly suggesting that this transient is a neutron star. Our detection brings to ten the number of X-ray sources in globular clusters in which a type I X-ray burst has been seen, out of twelve known bright sources. The statistical evidence that the fraction of low-mass X-ray binaries which contain a black hole accretor is smaller in globular clusters than in the galactic disk is suggestive, but as yet not compelling.
- Publication:
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Astronomy and Astrophysics
- Pub Date:
- January 1998
- DOI:
- arXiv:
- arXiv:astro-ph/9712272
- Bibcode:
- 1998A&A...329L..37I
- Keywords:
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- X-RAYS: BURSTS;
- GLOBULAR CLUSTERS: NGC 6652;
- Astrophysics
- E-Print:
- Published in A&