164 citations · 339 across the 8 of their papers we have counts for
8 papers
High-speed, multi-colour optical photometry of the anomalous X-ray pulsar 4U 0142+61 with ULTRACAM
V. S. Dhillon, T. R. Marsh, F. Hulleman +5
We present high-speed, multi-colour optical photometry of the anomalous X-ray pulsar 4U 0142+61, obtained with ULTRACAM on the 4.2-m William Herschel Telescope. We detect 4U 0142+6…
Optical and Infrared Observations of Anomalous X-ray Pulsars
Martin Durant, Marten H. van Kerkwijk, Ferdi Hulleman
The detection of optical/infrared counterparts to Anomalous X-ray Pulsars (AXPs) has greatly increased our understanding of these systems. Models for the AXP phenomenon were based…
Bursts, eclipses, dips and a refined position for the luminous low-mass X-ray binary in the globular cluster Terzan 6
J. J. M. in 't Zand, F. Hulleman, C. B. Markwardt +6
GRS 1747-312 is a bright transient X-ray source in the globular cluster Terzan 6 with quasi-periodic outbursts approximately every 4.5 months. We carried out 2-60 keV target-of-opp…
Optical and near-infrared observations of Anomalous X-ray pulsars
Ferdi Hulleman
We present recent results of our program of deep optical and near-infrared observations of AXPs. We find that the counterpart to AXP 4U 0142+61 has a peculiar spectral energy distr…
A possible faint near-infrared counterpart to the AXP 1E~2259+58.6
F. Hulleman, A. F. Tennant, M. H. van Kerkwijk +3
We present near-infrared and optical observations of the field of the Anomalous X-ray Pulsar 1E 2259+58.6 taken with the Keck telescope. We derive a subarcsecond Chandra position a…
An Optical Counterpart to the Anomalous X-ray Pulsar 4U 0142+61
F. Hulleman, M. H. van Kerkwijk, S. R. Kulkarni
The energy source of the anomalous X-ray pulsars is not well understood, hence their designation as anomalous. Unlike binary X-ray pulsars, no companions are seen, so the energy ca…