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Professor Paula Chadwick's Outputs (210)

3.9 day orbital modulation in the TeV gamma ray flux and spectrum from the X-ray binary LS 5039 (2007)
Journal Article
Aharonian, F., Akhperjanian, A., Bazer-Bachi, A., Beilicke, M., Benbow, W., Berge, D., …Ward, M. (2007). 3.9 day orbital modulation in the TeV gamma ray flux and spectrum from the X-ray binary LS 5039. Astronomy & Astrophysics, 460(3), 743-749. https://doi.org/10.1051/0004-6361%3A20065940

Aims. LS 5039 is a High Mass X-ray Binary (HMXRB) comprising a compact object in an eccentric 3.9 day orbit around a massive O6.5V star. Observations at energies above 0.1 TeV (1011 eV) by the High Energy Stereoscopic System (HESS) in 2004 revealed t... Read More about 3.9 day orbital modulation in the TeV gamma ray flux and spectrum from the X-ray binary LS 5039.

Very high-energy gamma rays from gamma-ray bursts (2007)
Journal Article
Chadwick, P. (2007). Very high-energy gamma rays from gamma-ray bursts. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 365(1854), 1343-1356. https://doi.org/10.1098/rsta.2006.1971

Very high-energy (VHE) gamma-ray astronomy has undergone a transformation in the last few years, with telescopes of unprecedented sensitivity having greatly expanded the source catalogue. Such progress makes the detection of a gamma-ray burst at the... Read More about Very high-energy gamma rays from gamma-ray bursts.

Fast variability of tera-electron volt gamma rays from the radio galaxy M87 (2006)
Journal Article
Aharonian, F., Akhperjanian, A., Bazer-Bachi, A., Beilicke, M., Benbow, W., Berge, D., …Ward, M. (2006). Fast variability of tera-electron volt gamma rays from the radio galaxy M87. Science, 314(5804), 1424-1427. https://doi.org/10.1126/science.1134408

The detection of fast variations of the tera–electron volt (TeV) (1012 eV) -ray flux, on time scales of days, from the nearby radio galaxy M87 is reported. These variations are about 10 times as fast as those observed in any other wave band and imply... Read More about Fast variability of tera-electron volt gamma rays from the radio galaxy M87.

Observations of the crab nebula with HESS (2006)
Journal Article
Aharonian, F., Akhperjanian, A., Bazer-Bachi, A., Beilicke, M., Benbow, W., Berge, D., …Ward, M. (2006). Observations of the crab nebula with HESS. Astronomy & Astrophysics, 457(3), 899-915

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.