Multiwavelength Observations of the Soft Gamma Repeater SGR 1900+14 during Its 2001 April Activation

Open Access
Authors
  • C. Kouveliotou
  • A. Tennant
  • P.M. Woods
  • M.C. Weisskopf
  • K. Hurley
  • R.P. Fender
  • S.T. Garrington
  • S.K. Patel
  • E. Göğüş
Publication date 2001
Journal Astrophysical Journal Letters
Volume | Issue number 558 | 1
Pages (from-to) L47-L50
Organisations
  • Faculty of Science (FNWI) - Anton Pannekoek Institute for Astronomy (API)
Abstract
The soft gamma repeater SGR 1900+14 became active on 2001 April 18 after about 2 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-rays 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, due to scattering in the interstellar medium, surrounding the source that extends up to 100 from the center of SGR 1900+14.
Document type Article
Language English
Published at https://doi.org/10.1086/323496
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