Computer Science
Scientific paper
Apr 1967
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1967natur.214...41e&link_type=abstract
Nature, Volume 214, Issue 5083, pp. 41-42 (1967).
Computer Science
10
Scientific paper
Two slitless Bragg spectrometers were successfully used on a Sun-pointed Skylark rocket flight (SL 304) on May 5, 1966, to measure the solar X-ray emission below 25 Å. The crystals were of potassium acid phthallate (KAP), with a lattice constant of 13.3 Å, and photons were detected with thin plastic window proportional counters. The rocket launch took place at 0414 h (U.T.) during a period of relatively quiet solar activity. In particular, no solar flares have been reported in a period of several hours around the time of launching. Solar pointing was achieved approximately 100 sec after launch and was maintained until re-entry 274 sec later. The apogee of the rocket was 181 km, giving a negligible atmospheric attenuation, for the X-ray wavelengths being measured, throughout most of the controlled flight. Four spectral scans over the wavelength band 11-25 Å were obtained. The data have been reduced by computer. A full analysis is still proceeding, but this communication reports the emission line identifications so far obtained, several not having previously been seen in the solar spectrum.
Evans Kenneth
Pounds Kenneth A.
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