  We analyzed RXTE data of GRS 1915+105 of X-ray low states between 1996 and
1998. The X-ray spectrum is dominated by the power law component. We found (i)
that the power law is pivoting at 10-30 keV, (ii) that the power law slope
correlates with radio flux, (iii) three different groups of 3-10 keV residuals,
(iv) that one of these residual groups correlates with the power law slope.
