Journal
SCIENCE
Volume 334, Issue 6052, Pages 69-72Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1208192
Keywords
-
Categories
Funding
- U.S. Department of Energy
- NSF
- Smithsonian Institution
- Natural Sciences and Engineering Research Council of Canada
- Science Foundation Ireland (SFI) [10/RFP/AST2748]
- Science and Technology Facilities Council in the United Kingdom
- Alexander von Humboldt Foundation
- Direct For Mathematical & Physical Scien
- Division Of Physics [855627] Funding Source: National Science Foundation
- Direct For Mathematical & Physical Scien
- Division Of Physics [900928, 0854911, 0970134] Funding Source: National Science Foundation
- Science Foundation Ireland (SFI) [10/RFP/AST2748] Funding Source: Science Foundation Ireland (SFI)
Ask authors/readers for more resources
We report the detection of pulsed gamma rays from the Crab pulsar at energies above 100 giga-electron volts (GeV) with the Very Energetic Radiation Imaging Telescope Array System (VERITAS) array of atmospheric Cherenkov telescopes. The detection cannot be explained on the basis of current pulsar models. The photon spectrum of pulsed emission between 100 mega-electron volts and 400 GeV is described by a broken power law that is statistically preferred over a power law with an exponential cutoff. It is unlikely that the observation can be explained by invoking curvature radiation as the origin of the observed gamma rays above 100 GeV. Our findings require that these gamma rays be produced more than 10 stellar radii from the neutron star.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available