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High Energy Astrophysics Data/X-ray Data
82
X-ray Astronomy
51
X-ray astronomy
31
Earth Sciences
2
Physical Geography and Environmental Geoscience
2
Physical Geography and Environmental Geoscience not elsewhere classified
2
Gamma rays: theory
1
Pulsars: individual (Crab)
1
Radiation mechanisms: nonthermal
1
Stars: neutron
1
X-rays: individual (Crab)
1
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