Publications (61)
Discovery of 1RXS J171824.2-402934 as an X-ray burster
R. G. Kaptein, J. J. M. in 't Zand, E. Kuulkers +3
We report the first-time detection of a type-I X-ray burst from a position that is consistent with that of 1RXS J171824.2-402934. The detection was made on Sep 23, 1996, with the W…
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…
Chandra and Hubble Space Telescope Study of the Globular Cluster NGC 288
A. K. H. Kong, C. Bassa, D. Pooley +5
We report on the Chandra X-ray Observatory observations of the globular cluster NGC 288. We detect four X-ray sources within the core radius and seven additional sources within the…
Creating ultra-compact binaries in globular clusters through stable mass transfer
M. V. van der Sluys, F. Verbunt, O. R. Pols
A binary in which a slightly evolved star starts mass transfer to a neutron star can evolve towards ultra-short orbital periods under the influence of magnetic braking. This is cal…
Photometric variability in the old open cluster M 67. II. General Survey
K. G. Stassun, M. van den Berg, R. D. Mathieu +1
We use differential CCD photometry to search for variability in BVI among 990 stars projected in and around the old open cluster M 67. In a previous paper we reported results for 2…
Detection of X-ray bursts in the globular cluster NGC 6652
J. J. M. in 't Zand, F. Verbunt, J. Heise +5
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 suggesti…