80 citations · 805 across the 33 of their papers we have counts for
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Combined Chandra, XMM-Newton and Hubble Space Telescope observations of the Galactic globular cluster NGC 2808
M. Servillat, A. Dieball, N. A. Webb +6
Using new Chandra X-ray observations and existing XMM-Newton X-ray and Hubble far ultraviolet observations, we aim to detect and identify the faint X-ray sources belonging to the G…
Stellar Exotica in 47 Tucanae
Christian Knigge, Andrea Dieball, Jesus Maiz Apellaniz +3
We present far-UV spectroscopy obtained with HST for 48 blue objects in the core of 47 Tuc. Based on their position in a FUV-optical colour-magnitude diagram, these were expected t…
Unveiling the core of the Globular Cluster M15 in the Ultraviolet
A. Dieball, C. Knigge, D. R. Zurek +4
We have obtained deep far- (FUV) and near-ultraviolet (NUV) images of the inner region of the dense globular cluster M15 with the Advanced Camera for Surveys on board the Hubble Sp…
A Blue Straggler Binary System with at least Three Progenitors in the Core of a Globular Cluster?
C. Knigge, R. L. Gilliland, A. Dieball +3
We show that the X-ray source W31 in the core of the globular cluster 47 Tucanae is physically associated with the bright blue straggler BSS-7. The two sources are astrometrically…
An ultracompact X-ray binary in the globular cluster M15 (NGC7078)
A. Dieball, C. Knigge, D. R. Zurek +5
We have used the Advanced Camera for Surveys on board the Hubble Space Telescope to image the core of the globular cluster M15 in the far-ultraviolet (FUV) waveband. Based on these…
Far-Ultraviolet Observations of the Globular Cluster NGC 2808 Revisited: Blue Stragglers, White Dwarfs and Cataclysmic Variables
A. Dieball, C. Knigge, D. R. Zurek +2
We present a reanalysis of far-ultraviolet (FUV) observations of the globular cluster NGC 2808 obtained with the Hubble Space Telescope. These data were first analyzed by Brown and…