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All Outputs (86)

H.E.S.S. observations of PKS 2155-304 (2005)
Journal Article
Aharonian, F., Akhperjanian, A., Aye, K., Bazer-Bachi, A., Beilicke, M., Benbow, W., …Wagner, S. (2005). H.E.S.S. observations of PKS 2155-304. Astronomy & Astrophysics, 430(3), 865-875. https://doi.org/10.1051/0004-6361%3A20041853

The high-frequency peaked BL Lac PKS 2155-304 at redshift z=0.117 has been detected with high significance (~45sigma) at energies greater than 160 GeV, using the H.E.S.S. stereoscopic array of imaging air-Cherenkov telescopes in Namibia. A strong sig... Read More about H.E.S.S. observations of PKS 2155-304.

High-energy particle acceleration in the shell of a supernova remnant (2004)
Journal Article
Aharonian, F., Akhperjanian, A., Aye, K., Bazer-Bachi, A., Beilicke, M., Benbow, W., …Wagner, S. (2004). High-energy particle acceleration in the shell of a supernova remnant. Nature, 432(7013), 75-77. https://doi.org/10.1038/nature02960

A significant fraction of the energy density of the interstellar medium is in the form of high-energy charged particles (cosmic rays)1. The origin of these particles remains uncertain. Although it is generally accepted that the only sources capable o... Read More about High-energy particle acceleration in the shell of a supernova remnant.

Calibration of cameras of the H.E.S.S. detector (2004)
Journal Article
Aharonian, F., Akhperjanian, A., Aye, K., Bazer-Bachi, A., Beilicke, M., Benbow, W., …Wagner, S. (2004). Calibration of cameras of the H.E.S.S. detector. Astroparticle Physics, 22(2), 109-125. https://doi.org/10.1016/j.astropartphys.2004.06.006

H.E.S.S.—the high energy stereoscopic system—is a new system of large atmospheric Cherenkov telescopes for GeV/TeV astronomy. Each of the four telescopes of 107 m2 mirror area is equipped with a 960-pixel photomultiplier-tube camera. This paper descr... Read More about Calibration of cameras of the H.E.S.S. detector.

Very high energy gamma rays from the direction of Sagittarius A<SUP>*</SUP> (2004)
Journal Article
Aharonian, F., Akhperjanian, A., Aye, K., Bazer-Bachi, A., Beilicke, M., Benbow, W., …Wagner, S. (2004). Very high energy gamma rays from the direction of Sagittarius A*. Astronomy & Astrophysics, 425(1), L13-L17. https://doi.org/10.1051/0004-6361%3A200400055

We report the detection of a point-like source of very high energy (VHE) -rays coincident within 1' of Sgr A *, obtained with the HESS array of Cherenkov telescopes. The -rays exhibit a power-law energy spectrum with a spectral index of and a flux ab... Read More about Very high energy gamma rays from the direction of Sagittarius A<SUP>*</SUP>.

Measuring σ₈ with Cluster Lensing: Biases from Unrelaxed Clusters. (2003)
Journal Article
Smith, G. P., Edge, A. C., Eke, V. R., Nichol, R. C., Smail, I., & Kneib, J. (2003). Measuring σ₈ with Cluster Lensing: Biases from Unrelaxed Clusters. Astrophysical Journal, 590(2), L79-L82. https://doi.org/10.1086/376747

We use gravitational lens models and X-ray spectral analysis of 10 X-ray-luminous galaxy clusters at z sime 0.2 to study the impact of cluster substructure on attempts to normalize the matter power spectrum. We estimate that unrelaxed clusters are 30... Read More about Measuring σ₈ with Cluster Lensing: Biases from Unrelaxed Clusters..

Very high energy gamma-rays from Centaurus X-3: indications and implications (2002)
Journal Article
Atoyan, A., Aye, K., Chadwick, P., Daniel, M., Lyons, K., McComb, T., …Rayner, S. (2002). Very high energy gamma-rays from Centaurus X-3: indications and implications. Astronomy & Astrophysics, 383(3), 864-880. https://doi.org/10.1051/0004-6361%3A20011732

We present the results of a detailed timing analysis of observations of Cen X-3 taken by the University of Durham Mark 6 imaging atmospheric Cherenkov telescope in 1997-1999. The presence of a TeV gamma -ray signal at the overall >= 4.5sigma signific... Read More about Very high energy gamma-rays from Centaurus X-3: indications and implications.

Very high energy gamma rays from Cen X-3 (2001)
Journal Article
Chadwick, P., Lyons, K., McComb, T., Orford, K., Osborne, J., Rayner, S., …Turver, K. (2001). Very high energy gamma rays from Cen X-3

VHE gamma rays from binary systems (2001)
Conference Proceeding
Chadwick, P., Chaty, S., Daniel, M., Haswell, C., Kolb, U., McComb, T., …Rayner, S. (2001). VHE gamma rays from binary systems. In F. Aharonian, & H. Volk (Eds.),

VHE gamma ray observations of Centaurus X-3 (2000)
Journal Article
Chadwick, P., Daniel, M., Lyons, K., McComb, T., McKenny, J., Nolan, S., …Turver, K. (2000). VHE gamma ray observations of Centaurus X-3. Astronomy and Astrophysics, 364, 165-169

Geomagnetic effects on atmospheric Cerenkov images (1999)
Journal Article
Chadwick, P., Lyons, K., McComb, T., Orford, K., Osborne, J., Rayner, S., …Turver, K. (1999). Geomagnetic effects on atmospheric Cerenkov images. Journal of Physics G: Nuclear and Particle Physics, 25, 1223-1233