Discovery of Spatial and Spectral Structure in the X-Ray Emission from the Crab Nebula

@article{Weisskopf2000DiscoveryOS,
  title={Discovery of Spatial and Spectral Structure in the X-Ray Emission from the Crab Nebula},
  author={Martin. C. Weisskopf and J. Jeff Hester and Allyn F. Tennant and Ronald F. Elsner and Norbert S. Schulz and Herman L. Marshall and Margarita Karovska and Joy S. Nichols and Douglas A. Swartz and Jeffery J. Kolodziejczak and Stephen L. O’Dell},
  journal={The Astrophysical Journal Letters},
  year={2000},
  volume={536},
  pages={L81 - L84}
}
The Chandra X-Ray Observatory observed the Crab Nebula and pulsar during orbital calibration. Zeroth-order images with the High-Energy Transmission Grating (HETG) readout by the Advanced CCD Imaging Spectrometer spectroscopy array (ACIS-S) show a striking richness of X-ray structure at a resolution comparable to that of the best ground-based visible-light observations. The HETG-ACIS-S images reveal, for the first time, an X-ray inner ring within the X-ray torus, the suggestion of a hollow-tube… 

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