X-Ray flux from Centaurus X-2 in the energy range 2-20 KE V

Abstract

Two rocket flights carrying X-ray payloads were conducted from Thumba Equatorial Rocket Launching Station (TERLS), Trivandrum, India, on November 3, 1968, and November 7, 1968, respectively. The first evidence for the existence of low-energy X-ray flux in the energy range 2-20 keV from the Cen X-2 source since its reported extinction in May 1967 is presented. The observed flux has the same energy spectrum as that observed in the high-energy range by Lewin et al. in October 1967.