Multi-wavelength observations of the Soft Gamma Repeater SGR 1900+14 during its April 2001 activation

C. Kouveliotou, A. Tennant, P. M. Woods +6

The soft-gamma repeater SGR 1900+14 became active on 18 April 2001 after about two years of quiescence; it had remained at a very low state of activity since the fall of 1998, when…