Crab pulsar interpulse X-ray counts match the Skellam distribution expected from two independent Poisson processes, while the main pulse shows excess variance that disappears upon averaging over rotations with no detected pulse-to-pulse memory.
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The Guitar Nebula requires extreme acceleration with η_acc ≳ 3/4 and traverses a dense low-ionization shell from an old supernova remnant in the pressure-driven snowplow regime.
citing papers explorer
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Photon-Count Statistics of Crab X-ray Pulses: Skellam Behavior and Excess Variance in the Main Pulse
Crab pulsar interpulse X-ray counts match the Skellam distribution expected from two independent Poisson processes, while the main pulse shows excess variance that disappears upon averaging over rotations with no detected pulse-to-pulse memory.
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Guitar Nebula: extreme accelerator in extreme environment
The Guitar Nebula requires extreme acceleration with η_acc ≳ 3/4 and traverses a dense low-ionization shell from an old supernova remnant in the pressure-driven snowplow regime.