• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Astrophysical journal >MONITORING SUPERGIANT FAST X-RAY TRANSIENTS WITH SWIFT. II. RISE TO THE OUTBURST IN IGR J16479-4514
【24h】

MONITORING SUPERGIANT FAST X-RAY TRANSIENTS WITH SWIFT. II. RISE TO THE OUTBURST IN IGR J16479-4514

机译：使用SWIFT监控卓越的快速X射线瞬态。二。在IGR J16479-4514中崛起

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

IGR J16479-4514 is a supergiant fast X-ray transient (SFXT), a new class of high-mass X-ray binaries, whose number is rapidly growing thanks to the INTEGRAL observations of the Galactic plane. It has been regularly monitored with Swift XRT since 2007 November to study the quiescent emission, the outburst properties, and their recurrence. A new bright outburst, reaching fluxes above 10~(-9) erg cm~(-2) s~(-1) was caught by the Swift BAT. Swift immediately repointed at the target with the narrow-field instruments so that, for the first time, an outburst from an SFXT where a periodicity in the outburst recurrence is unknown could be observed simultaneously in the 0.2-150 keV energy band. The X-ray emission is highly variable and spans almost 4 orders of magnitude in count rate during the Swift XRT observations covering a few days before and after the bright peak. The X-ray spectrum in outburst is hard and highly absorbed. The power-law fit resulted in a photon index of 0.98 ± 0.07, and in an absorbing column density of ～5 × 10~(22)cm~(-2). These observations demonstrate that in this source (similarly to what was observed during the 2007 outburst from the periodic SFXT IGR J11215-5952), the accretion phase lasts much longer than a few hours.
机译：IGR J16479-4514是超快速X射线瞬变（SFXT），这是一类新型的高质量X射线双星，由于银河系平面的整体观测，其数量正在迅速增长。自2007年11月以来，已使用Swift XRT对其进行了定期监测，以研究静态辐射，爆发特性及其复发。 Swift BAT捕获到一个新的明亮爆发，其通量达到10〜（-9）erg cm〜（-2）s〜（-1）以上。斯威夫特立即用窄场仪器将目标对准目标，因此，第一次可以在0.2-150 keV的能带同时观察到SFXT的爆发，该爆发的复发周期是未知的。 X射线的发射变化很大，在Swift XRT观测期间，亮峰前后的几天，计数率的跨度几乎达到4个数量级。突出的X射线光谱坚硬且被高度吸收。幂律拟合的光子指数为0.98±0.07，吸收柱密度为〜5×10〜（22）cm〜（-2）。这些观察结果表明，在该震源中（类似于2007年SFXT IGR J11215-5952周期性爆发所观测到的），吸积阶段持续的时间长于几个小时。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号