324 citations · 4.9k across the 84 of their papers we have counts for
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astro-ph2000★ 164 cited
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…
astro-ph2000★ 1 cited
X-ray and optical follow-up observations of the August 1998 X-ray transient in NGC6440
F. Verbunt, M. H. van Kerkwijk, J. J. M. in 't Zand +1
The BeppoSAX Wide Field Cameras detected a transient in NGC6440 on 1998 Aug 22. ROSAT did not detect this source on 1998 Sep 8, indicating that the X-ray flux had decreased by a fa…