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High-Energy Observations of the Binary Millisecond Pulsar PSR J0218+4232
L. Kuiper, W. Hermsen, F. Verbunt +2
We report the detection of pulsed X-ray emission () from the binary millisecond pulsar PSR J0218+4232 in a 100 ks ROSAT HRI observation. The pulse profile shows a sharp main…
Observations of accretion disks in X-ray binaries
Frank Verbunt
A brief overview is given of the observations of accretion disks in X-ray binaries, discussing their geometry, their effect on the rotation period of the accreting object, their op…
X rays from old open clusters: M 67 and NGC 188
T. Belloni, F. Verbunt, R. D. Mathieu
We have observed the old open clusters M 67 and NGC 188 with the ROSAT PSPC. In M 67 we detect a variety of X-ray sources. The X-ray emission by a cataclysmic variable, a single ho…
Nine X ray sources in the globular cluster 47 Tucanae
F. Verbunt, G. Hasinger
We analyze ROSAT HRI observations obtained from 1992 to 1996 of the globular cluster 47 Tuc. Identifications of two X-ray sources with HD 2072 and with a galaxy, respectively, are…