Detection of Sub-TeV Gamma Rays from the Galactic Center Direction by CANGAROO-II

By K. Tsuchiya, R. Enomoto, L. Ksenofontov, M. Mori, T. Naito, A. Asahara, G. Bicknell, R. Clay, Y. Doi, P. Edwards and 41 more. 2004

157 citations recorded by the source corpus.

We have detected sub-TeV gamma-ray emission from the direction of the Galactic center (GC) using the CANGAROO-II Imaging Atmospheric Cerenkov Telescope. We detected a statistically significant excess at energies greater than 250 GeV. The flux was 1 order of magnitude lower than that of the Crab Nebula at 1 TeV with a soft spectrum proportional to E-4.6±0.5. The signal centroid is consistent with the GC direction, and the observed profile is consistent with a pointlike source. Our data suggest that the GeV source 3EG J1746-2851 is identical to this TeV source, and we study the combined spectra to determine the possible origin of the gamma-ray emission. We also obtain an upper limit on the cold dark matter density in the Galactic halo.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/e2d24e8d5da0b3d7b2fba9809dc50d8e634430f5

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In Astronomy and Astrophysics

1. H. C. Aharonian
2. et al
3. D. Schneider
4. Gordon Richards
5. N. Evans II
6. Luis C. Ho
7. M. Strauss
8. L. Hernquist

In Nuclear and High Energy Physics

1. H. C. Aharonian
2. et al
3. J. Vink
4. P. Serpico
5. Paul Romatschke
6. S. Gubser
7. Alice Collaboration
8. Cms Collaboration

Citations in the corpus

• Very high-energy gamma rays from the direction of Sagittarius A* (2004, methodology): “The CANGAROO collaboration recently reported the detection of sub-TeV gamma rays from within 0.1◦ of the GC based on 67 h of (on-source) data taken in July 2001 and July/August 2002 (Tsuchiya et al. 2004).”