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Spatially Resolved X-Ray Spectra of Coronal Active Regions

Published online by Cambridge University Press:  14 August 2015

R. C. Catura ,
L. W. Acton ,
E. G. Joki ,
C. G. Rapley  and
J. L. Culhane
R. C. Catura
Affiliation:
Lockheed Palo Alto Laboratories, U.S.A.
L. W. Acton
Affiliation:
Lockheed Palo Alto Laboratories, U.S.A.
E. G. Joki
Affiliation:
Lockheed Palo Alto Laboratories, U.S.A.
C. G. Rapley
Affiliation:
Mullard Space Science Laboratory, University College London, England
J. L. Culhane
Affiliation:
Mullard Space Science Laboratory, University College London, England

Summary

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X-ray spectra from a number of coronal active regions were obtained during ATM support rocket flights carried out by the Lockheed group on June 11 and December 19, 1973. Multi-grid collimators were used to provide fields of view of 40″ diameter and 90″ diameter for a number of scanning crystal spectrometers and a bent crystal spectrometer which employed a position sensitive proportional counter to register the diffracted spectrum. A solar image was produced on film and on a TV camera on board the rocket with the aid of a 1 Å Hα filter. A small part of the X-ray collimator was used to generate a multiple spot diffraction pattern which was superimposed on the Hα image and the composite picture was transmitted to the ground. Pre-launch calibrations allowed the spot corresponding to the X-ray collimator axis to be identified and so the collimator pointing direction on the solar disc was controlled from the ground by means of commands sent to the rocket.

Type
Part 2: Active Regions
Information
Symposium - International Astronomical Union , Volume 68: Solar X, Gamma, and EUV Radiation , 1975 , pp. 67
Copyright
Copyright © Reidel 1975 

References

Catura, R. C., Joki, E. G., Bakka, J. C., Rapley, C. G., and Culhane, J. L.: 1974, Monthly Notices Roy. Astron. Soc. 168, 217.Google Scholar