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18 February 2025

» arxiv » astro-ph/0107170

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Multi-wavelength observations of the Soft Gamma Repeater SGR 1900+14 during its April 2001 activation
C. Kouveliotou ; A. Tennant ; P. M. Woods ; M. C. Weisskopf ; K. Hurley ; R. P. Fender ; S.T. Garrington ; S. K. Patel & E. Gogus ;
Date:	10 Jul 2001
Subject:	astro-ph
Abstract:	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 it exhibited extraordinary flaring. We have observed the source in the gamma and X rays with Ulysses and Chandra, and in the radio with MERLIN. We report here the confirmation of a two component X-ray spectrum (power law + blackbody), indicating emission from the neutron star surface. We have determined that there is a dust halo surrounding the source that extends up to >~ 100’’ from the center of SGR 1900+14, due to scattering in the interstellar medium.
Source:	arXiv, astro-ph/0107170
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