activity
19972004
most citedUltraluminous X-Ray Sources in External Galaxies

736 citations · 2.7k across the 32 of their papers we have counts for

collaborators

32 papers

astro-ph2004★ 180 cited

High Resolution Imaging of the HeII lambda 4686 Emission Line Nebula Associated with the Ultraluminous X-Ray Source in Holmberg II

P. Kaaret, M. J. Ward, A. Zezas

We present Hubble Space Telescope images of the He{\sc iii} region surrounding the bright X-ray source in the dwarf irregular galaxy Holmberg II. Using {\it Chandra}, we find a pos…

astro-ph2004★ 92 cited

A very low luminosity X-ray flash: XMM-Newton observations of GRB 031203

D. Watson, J. Hjorth, A. Levan +9

GRB031203 was observed by XMM-Newton twice, first with an observation beginning 6 hours after the burst, and again after 3 days. The afterglow had average 0.2-10.0keV fluxes for th…

astro-ph2003★ 23 cited

The X-ray, optical and radio evolution of the GRB030329 afterglow and the associated SN2003dh

R. Willingale, J. P. Osborne, P. T. O'Brien +3

Extensive X-ray, optical and radio observations of the bright afterglow of the Gamma Ray Burst GRB 030329 are used to construct the multi-frequency evolution of the event. The data…

astro-ph2003★ 86 cited

The unusual supernova remnant surrounding the ultraluminous X-ray source IC 342 X-1

T. P. Roberts, M. R. Goad, M. J. Ward +1

We report the results of an observation of a large diameter (110 pc) supernova remnant (SNR) found to encircle the position of the ultraluminous X-ray source (ULX) IC 342 X-1. The…

astro-ph2003★ 29 cited

The Collimated Wind in NGC 253

H. Sugai, R. I. Davies, M. J. Ward

Near-infrared Fabry-Perot imaging has revealed H2 emission extended to about 130 pc from the disk of NGC 253. It is closely related to the hot plasma observed in soft X-rays: filam…

astro-ph2003★ 15 cited

XMM-Newton observation of the Seyfert 1 ESO 198-G24

D. Porquet, J. S. Kaastra, K. L. Page +3

We present the results from an XMM-Newton observation (January 24, 2001) of the bright Seyfert 1 galaxy ESO 198-G24 (z=0.045). We found that this Seyfert has an intrinsic 2-10 keV…