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

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

2001-07-10

arxiv.org/abs/astro-ph/0107170v1

Astronomy and Astrophysics

Astrophysics

13 pages 3 figures, accepted for publication in the ApJL

Scientific paper

10.1086/323496

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.

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