Chitnis, V. R; Agrawal, P. C; Manchanda, R. K; Rao, A. R
(Astronomical Society of India, 1993)
We have studied X-ray binaries 4U1907 + 09, GX1 + 4 and Cygnus X-1 in the energy range 20-100 keV, using balloon-borne xenon-filled multilayer proportional counters flown from Hyderabad, India. Results of these observations ...