RXTE Observations of the SGR 1806-20 Steady Emission
  We discuss observations of the quiescent emission from the soft gamma repeater SGR 1806-20 by the Rossi X-ray Timing Explorer. We find that the 2-20 keV RXTE data is consistent with a constant spectral shape during both active bursting periods and periods of relative quiescence, and is best described by a nonthermal (power law) spectral shape. Using archival ASCA data we find that the quiescent spectrum of SGR 1806-20 is well fit over the energy range 1-30 keV by a power law of photon index 2.31 +/- 0.04, with thermal bremsstrahlung and Raymond-Smith models producing much worse fits to the data. 
D. Marsden (1), R. E. Rothschild (1), C. Kouveliotou (2 and 3), S.   Dieters (2 and 4), and J. van Paradijs (4 and 5) ((1) C...