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arXiv 0811.0247astro-ph
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INTEGRAL/IBIS观测到的硬X射线源及其科学

Hard X-Ray sources observed by INTEGRAL/IBIS and their science

Pietro Ubertini

摘要:

在超过5.5年的飞行寿命之后,欧空局空间观测站INTEGRAL正在描绘软伽马射线领域的新情景。随着对400多个硬X射线源的观测和发现,我们已经改变了对一个中等拥挤和黑暗的天空的看法,这个天空基本上是由“奇特的”和不稳定的源组成的。新的高能量天空也是由各种各样的“正常”,但非常强大的对象,其特征是新的吸积和加速过程。在能量范围17-100 keV的421个源中,第三INTEGRAL/IBIS目录包括41%的星系吸积系统,29%的河外天体,8%的其他类型,26%未分类,即来源不明。如果与以前的IBIS/ISGRI调查相比,很明显,HMXB的发现率持续增加,活动星系核的发现数量增加,包括各种遥远的类星体,基本上是由于远离银河系平面的曝光增加,而没有识别的来源的百分比保持不变。到2006年底,INTEGRAL将完成核心方案的观测,因为它将提供对整个银河系平面的几乎恒定的曝光,并将从2009年初开始向科学界完全开放,供开放时间和关键方案观测。在本文中,我们简要地回顾了第三次INTEGRAL/IBIS星表(cat 3)的主要成果,包括INTEGRAL高能量天空的概要,特别是关于高能量发射源,包括低和高质量X射线双星(LMXB和HMXB),超巨星快速X射线瞬变(SFXT),脉冲星风星云(PWN)和活动星系核(AGN)。

英文摘要:

After more than 5.5 years of in flight lifetime, the ESA space observatory INTEGRAL is depicting a new scenario in the soft gamma Ray domain. With the observation and discovery of more than 400 hard X-Ray sources has changed our view of a moderately crowded and dark sky basically populated by "peculiar" and erratic sources. The new high energy sky is also composed by a large variety of "normal" though very powerful objects, characterized by new accretion and acceleration processes. Among the 421 sources detected in the energy range 17-100 keV the 3rd INTEGRAL/IBIS catalogue includes 41% galactic accreting system, 29% extragalactic objects, 8% of other types, and 26% not classified i.e. of unknown origin. If compared to to previous IBIS/ISGRI surveys it is clear that there is a continuous increase of the rate of discovery of HMXB, an increase in the number of AGN discovered, including a variety of distant QSOs, basically due to the increased exposure away from the Galaxy Plane, while the percentage of sources without an identification has remained constant. INTEGRAL, by the end of Y6, will complete the Core Programme observation due to provide an almost constant exposure of the whole Galaxy Plane and will be fully open to the scientific community for Open Time and Key Programme observations from the beginning of 2009. In this paper we shortly review the main outcome of the 3rd INTEGRAL/IBIS catalogue (cat3) including an excursus of the INTEGRAL high energy sky with particular regard to sources emitting at high energy, including Low and High Mass X-Ray Binaries (LMXB & HMXB), Supergiant Fast X-Ray Transients (SFXT), Pulsar Wind Nebulae (PWN) and Active Galactic Nuclei (AGN).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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