GRBM observations and spectral analysis of
SGR1900+14

The GRBM detection of the August 27, 1998 giant outburst of the soft gamma-repeater SGR1900+14 has given us the oportunity of testing the LS1 response outside the WFC field of view ($\theta$=48$\rm ^{\circ}$, $\phi$=29$\rm ^{\circ}$) and to obtain very interesting astrophysical results. Also, as anticipated in section 4.8, due the extremely high flux, dead time and recycle corrections were extremely important in the analysis of this source.

In this section, after giving a briefly resuming soft gamma-ray repeaters properties, we outline the specific data analysis steps followed dor this source and the assumptions made, and finally show the results of the spectral analysis.