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The Soft Gamma-ray Repeaters (hereafter SGRs) are typically
too soft to trigger the SWTCs, especially the HR condition
; nevertheless, it seldom happens that the
HR, as it automatically estimated, could overcome the above
cited HR condition. Apart from the two giant flares come from
the SGR1900+14 (August 27, 1998, and April 18, 2001), the typical
burst activity from these sources consists of brief and soft
pulses with durations
1 s; therefore, provided that such
events have triggered the GRBM on-board logic, so that their
HTR profiles could be available. Our results have been cross-checked
with SGR activity reports from other missions, particularly
from the recent one from Konus/WIND ([Aptekar, et al., 2001]).
In particular, in common with Konus/WIND
we discovered that the GRBM units triggered SGR bursts from
three out of the four known SGRs: 1900+14, 1627-41 and 1806-20
(chapter 6).
Cristiano Guidorzi
2003-07-31