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Science 2 October 1987:
Vol. 238. no. 4823, pp. 61 - 64
DOI: 10.1126/science.238.4823.61
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Articles

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

J. H. UNDERWOOD 1, M. E. BRUNER 2, B. M. HAISCH 2, W. A. BROWN 2, and L. W. ACTON 2

1 Lawrence Berkeley Laboratory, Berkeley, CA 94720.
2 Lockheed Palo Alto Research Laboratory, Palo Alto, CA 94304.

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.

Submitted on May 15, 1987
Accepted on July 7, 1987


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Soft X-ray Images of the Solar Corona with a Normal-Incidence Cassegrain Multilayer Telescope.
A. B. C. WALKER JR., J. F. LINDBLOM, T. W. BARBEE JR., and R. B. HOOVER (1988)
Science 241, 1781-1787
   Abstract »    PDF »


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Science. ISSN 0036-8075 (print), 1095-9203 (online)