0 v 1 1 0 Ju l 2 00 1 Multi - wavelength observations of the Soft Gamma Repeater SGR 1900 + 14 during its April 2001 activation
نویسندگان
چکیده
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.
منابع مشابه
The first XMM - Newton observations of the Soft Gamma - ray Repeater SGR 1900 + 14 1
A ∼50 ks XMM-Newton observation of SGR 1900+14 has been carried out in September 2005, after almost three years during which no bursts were detected from this soft gamma-ray repeater. The 0.8-10 keV spectrum was well fit by a power law plus blackbody model with photon index Γ=1.9±0.
متن کاملar X iv : a st ro - p h / 03 06 09 1 v 1 4 J un 2 00 3 The 2001 April Burst Activation of SGR 1900 + 14 : X - ray afterglow emission
After nearly two years of quiescence, the soft gamma-ray repeater SGR 1900+14 again became burst-active on April 18 2001, when it emitted a large flare, preceded by few weak and soft short bursts. After having detected the X and gamma prompt emission of the flare, BeppoSAX pointed its narrow field X-ray telescopes to the source in less than 8 hours. In this paper we present an analysis of the d...
متن کاملar X iv : a st ro - p h / 02 01 09 3 v 1 7 J an 2 00 2 Mid - infrared observations of the SGR 1900 + 14 error box
We report on mid-infrared observations of the compact stellar cluster located in the proximity of SGR 1900+14, and the radio/X-ray position of this soft-gamma repeater. Observations were performed in May and June of 2001 when the bursting source was in an active state. At the known radio and X-ray position of the SGR we did not detect transient mid-IR activity, although the observations were pe...
متن کاملar X iv : a st ro - p h / 99 04 24 4 v 2 3 J un 1 99 9 Is SGR 1900 + 14 a Magnetar ?
We present RXTE observations of the soft gamma–ray repeater SGR
متن کاملar X iv : a st ro - p h / 99 04 24 4 v 1 1 9 A pr 1 99 9 Is SGR 1900 + 14 a Magnetar ?
We present RXTE observations of the soft gamma–ray repeater SGR
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