Variability of the symbiotic X-ray binary GX 1+4: Enhanced activity near periastron passage
Variability of the symbiotic X-ray binary GX 1+4: Enhanced activity near periastron passage
Context. GX 1+4 belongs to a rare class of X-ray binaries with red giant donors, symbiotic X-ray binaries. The system has a history of complicated variability on multiple timescales in the optical light and X-rays. The nature of this variability remains poorly understood. Aims. We study variability of GX 1+4 …