The three plots illustrate the X-ray and radio behavior of the March-October 1996 events in the X-ray transient (and black hole candidate) GRS1739-278. The top plot contains the X-ray fluxes, mostly as measured by the Rossi X-ray Timing Explorer ASM at 2-12 keV. The middle plot is X-ray hardness data from the RXTE ASM which shows the initial change from a hard X-ray state at the beginning of the X-ray flare to a softer X-ray state. The bottom plot shows the VLA light curve at 4.9 GHz, showing an exponential rise with an e-folding time of 8.5 days and an exponential decay with an e-folding time of 13.3 days, followed by radio fluctuations that roughly follow, with delays of the order of 10-20 days, the "glitches" in the X-ray light curve.
VLA Radio Data: R.M. Hjellming, M.P. Rupen, V. Dhawan, R. Remillard, J. Marti, F. Mirabel, and L.F. Rodriguez.