Title: Episodic Torque-Luminosity Correlations and Anticorrelations of GX 1+4,
Abstract: We analyse archival CGRO-BATSE X-ray flux and spin frequency measurements of
GX 1+4 over a time span of 3000 days. We systematically search for time
dependent variations of torque luminosity correlation. Our preliminary results
indicate that the correlation shifts from being positive to negative on time
scales of few 100 days.