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Chandra monitoring observations of the ultraluminous X-ray source NGC 5204 X-1. (2006)
Journal Article
Roberts, T., Kilgard, R., Warwick, R., Goad, M., & Ward, M. (2006). Chandra monitoring observations of the ultraluminous X-ray source NGC 5204 X-1. Monthly Notices of the Royal Astronomical Society, 371(4), 1877-1890. https://doi.org/10.1111/j.1365-2966.2006.10821.x

We report the results of a two-month campaign conducted with the Chandra X-ray observatory to monitor the ultraluminous X-ray source (ULX) NGC 5204 X-1. This was composed of a 50-ks observation, followed by ten 5-ks follow-ups spaced initially at ∼3,... Read More about Chandra monitoring observations of the ultraluminous X-ray source NGC 5204 X-1..

Discovery of the two “wings” of the Kookaburra complex in VHE γ-rays with HESS (2006)
Journal Article
Aharonian, F., Akhperjanian, A., Bazer-Bachi, A., Beilicke, M., Benbow, W., Berge, D., …Ward, M. (2006). Discovery of the two “wings” of the Kookaburra complex in VHE γ-rays with HESS. Astronomy & Astrophysics, 456(1), 245-251. https://doi.org/10.1051/0004-6361%3A20065511

Aims.Search for Very High Energy $\gamma$-ray emission in the Kookaburra complex through observations with the HESS array. Methods.Stereoscopic imaging of Cherenkov light emission of the $\gamma$-ray showers in the atmosphere is used for the reconstr... Read More about Discovery of the two “wings” of the Kookaburra complex in VHE γ-rays with HESS.

Discovery of very high energy γ-ray emission from the BL Lacertae object H 2356-309 with the HESS Cherenkov telescopes (2006)
Journal Article
Aharonian, F., Akhperjanian, A., Bazer-Bachi, A., Beilicke, M., Benbow, W., Berge, D., …Ward, M. (2006). Discovery of very high energy γ-ray emission from the BL Lacertae object H 2356-309 with the HESS Cherenkov telescopes. Astronomy & Astrophysics, 455(2), 461-466. https://doi.org/10.1051/0004-6361%3A20054732

The extreme synchrotron BL Lac object H 2356-309, located at a redshift of z = 0.165, was observed from June to December 2004 with a total exposure of $\approx$40 h live-time with the HESS (High Energy Stereoscopic System) array of atmospheric-Cheren... Read More about Discovery of very high energy γ-ray emission from the BL Lacertae object H 2356-309 with the HESS Cherenkov telescopes.

First detection of a VHE gamma-ray spectral maximum from a cosmicsource: HESS discovery of the Vela X nebula (2006)
Journal Article
Aharonian, F., Akhperjanian, A., Bazer-Bachi, A., Beilicke, M., Benbow, W., Berge, D., …Ward, M. (2006). First detection of a VHE gamma-ray spectral maximum from a cosmicsource: HESS discovery of the Vela X nebula. Astronomy & Astrophysics, 448(2), L43-L47. https://doi.org/10.1051/0004-6361%3A200600014

The Vela supernova remnant (SNR) is a complex region containing a number of sources of non-thermal radiation. The inner section of this SNR, within 2 degrees of the pulsar PSR B0833-45 , has been observed by the HESS $\gamma$-ray atmospheric Cherenko... Read More about First detection of a VHE gamma-ray spectral maximum from a cosmicsource: HESS discovery of the Vela X nebula.

An XMM-Newton view of M101 - II. Global X-ray source properties. (2005)
Journal Article
Jenkins, L., Roberts, T., Warwick, R., Kilgard, R., & Ward, M. (2005). An XMM-Newton view of M101 - II. Global X-ray source properties. Monthly Notices of the Royal Astronomical Society, 357(2), 401-419. https://doi.org/10.1111/j.1365-2966.2005.08645.x

We present the global X-ray properties of the point source population in the grand-design spiral galaxy M101, as seen with XMM–Newton. 108 X-ray sources are detected within the D25 ellipse of M101, of which ∼24 are estimated to be background galaxies... Read More about An XMM-Newton view of M101 - II. Global X-ray source properties..

A new description of the X-ray spectra of ULXs (2004)
Journal Article
Roberts, T., Warwick, R., Stobbart, A., Goad, M., Ward, M., Kilgard, R., & Jenkins, L. (2004). A new description of the X-ray spectra of ULXs. Bulletin of the American Astronomical Society, 8,