New upper limits on Jovian X rays |
| |
Authors: | L.E. Peterson H.S. Hudson V. Tsikoudi |
| |
Affiliation: | Department of Physics, C-011, University of California, San Diego, La Jolla, California 92093, USA |
| |
Abstract: | The UCSD X-ray telescope on OSO-3 scanned Jupiter for 33 days during February and March 1968. We have searched the data for a steady Jovian flux, and for a burst component at times of decametric radio bursts. Neither component was detected at a sensitivity of ~0.1 photon (cm2sec)?1 for hv > 7.7 keV. At 4.4AU, the 3σ upper limits correspond to X-ray luminosities of 7.4 × 1019 ergs sec?1 for the steady component, and 2 × 1020 ergs sec?1 for the burst component. The observations occurred during a period of high solar activity, during which three sudden-commencement magnetic storms were observed at Earth. We compare the upper limits with several different calculations of the expected flux levels, and conclude that major improvements in X-ray detection techniques will be required before Jovian X rays can be detected with near-Earth observations. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|