Physics
Scientific paper
Dec 1970
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1970natur.228.1077s&link_type=abstract
Nature, Volume 228, Issue 5276, pp. 1077-1079 (1970).
Physics
3
Scientific paper
IN a recent flight of a Black Brant rocket, AKF-IIIB-51, we have observed a new intense source of X-radiation with a photon flux of 16.9 cm-2 s-1 in the 1.5-5.0 keV range. The rocket was launched on October 26, 1969, from Resolute Bay, Canada, at 0640 h GMT and reached an apogee of 196 km. It carried two proportional counters nested in a plastic scintillator mould, with their fields of view (~20° × 20°) in opposite radial directions. The detailed experimental configuration was similar to that used in earlier University of Calgary flights1. The detectors had windows of 3.0 × 10-3 inch beryllium arid 2.5 × 10-4 inch mylar so that together they covered the range of energies 0.2-12.5 keV. Above the atmosphere the rocket spun with a period of 3.34 s and processed very slowly (period ~52 min) about a cone of half angle 18°, consequently scanning almost the same region of sky on each sweep. The aspect was determined, using the data collected by three on-board magnetometers and a system of lunar sensors, to less than 2° uncertainty. At the time of the flight the Sun was 28° below the horizon with a shadow height of 750 km.
Shukla P. G.
Wilson Brian G.
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