X-ray Photographs of a Solar Active Region with a Multilayer Telescope at Normal Incidence

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Science  02 Oct 1987:
Vol. 238, Issue 4823, pp. 61-64
DOI: 10.1126/science.238.4823.61


An astronomical photograph was obtained with a multilayer x-ray telescope. A 4-centimeter tungsten-carbon multilayer mirror was flown as part of an experimental solar rocket payload, and successful images were taken of the sun at normal incidence at a wavelength of 44 angstroms. Coronal Si-XII emission from an active region was recorded on film; as expected, the structure is very similar to that observed at O-VIII wavelengths by the Solar Maximum Mission flat crystal spectrometer at the same time. The small, simple optical system used in this experiment appears to have achieved a resolution of 5 to 10 arc seconds.