Multiwavelength Observations of the Soft Gamma Repeater SGR 1900+14 during Its 2001 April Activation
The Astrophysical Journal2001Vol. 558(1), pp. L47–L50
Citations Over TimeTop 10% of 2001 papers
C. Kouveliotou, Allyn F. Tennant, Peter Woods, Martin C. Weisskopf, K. Hurley, R. P. Fender, S. T. Garrington, S. Patel, Ersin Göğüş
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.
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