An EXOSAT Observation of CTB 80

Abstract

The results of an EXOSAT observation of the Crab-like supernova remnant CTB 80 are presented. The 0.05-6 keV X-ray spectrum is well fitted by a power law with an energy index of 0.9, similar to that of other Crab-like remnants. This spectral measurement differs from an earlier result from an Einstein observation where a much steeper index was reported. This discrepancy results from the fact that the Einstein result is sensitive to the assumed line-of-sight absorption, whereas the EXOSAT result is not. A search for an X-ray counterpart to the 39.5 ms radio pulsations is reported; however, the X-ray source is too faint to usefully constrain the pulse amplitude.