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

C. Kouveliotou | Zendy; Allyn F. Tennant | Zendy; Peter Woods | Zendy; Martin C. Weisskopf | Zendy; K. Hurley | Zendy; R. P. Fender | Zendy; S. T. Garrington | Zendy; S. Patel | Zendy; E. Göğüş | Zendy

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

Author(s) -

C. Kouveliotou,

Allyn F. Tennant,

Peter Woods,

Martin C. Weisskopf,

K. Hurley,

R. P. Fender,

S. T. Garrington,

S. Patel,

E. Göğüş

Publication year - 2001

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/323496

Subject(s) - physics , astrophysics , merlin (protein) , gamma ray , astronomy , halo , black body radiation , neutron star , interstellar medium , radiation , nuclear physics , galaxy , medicine , cancer , suppressor

The soft-gamma repeater SGR 1900+14 became active on 18 April 2001 afterabout two years of quiescence; it had remained at a very low state of activitysince the fall of 1998, when it exhibited extraordinary flaring. We haveobserved the source in the gamma and X rays with Ulysses and Chandra, and inthe radio with MERLIN. We report here the confirmation of a two component X-rayspectrum (power law + blackbody), indicating emission from the neutron starsurface. We have determined that there is a dust halo surrounding the sourcethat extends up to >~ 100'' from the center of SGR 1900+14, due to scatteringin the interstellar medium.Comment: 13 pages 3 figures, accepted for publication in the ApJ

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