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arXiv 1208.0231astro-ph.HE
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小麦哲伦云的XMM-牛顿巡天

The XMM-Newton survey of the Small Magellanic Cloud

F. Haberl, R. Sturm, J. Ballet, D. J. Bomans, D. A. H. Buckley, M. J. Coe, R. Corbet, M. Ehle, M. D. Filipovic, M. Gilfanov, D. Hatzidimitriou, N. La Palombara,… 展开作者

F. Haberl, R. Sturm, J. Ballet, D. J. Bomans, D. A. H. Buckley, M. J. Coe, R. Corbet, M. Ehle, M. D. Filipovic, M. Gilfanov, D. Hatzidimitriou, N. La Palombara, S. Mereghetti, W. Pietsch, S. Snowden, A. Tiengo

摘要:

虽然在2009年之前,有许多XMM-牛顿观测档案对小麦哲伦云(SMC)进行了观测,但只覆盖了整个星系的一小部分。在2009年5月至2010年3月期间,我们对SMC进行了XMM-牛顿测量,以获得其杆和机翼的完整过剩。30个不同领域的33个观测结果,总曝光量约为ne Ms,填补了缺失的部分。我们系统地处理了所有来自欧洲光子成像相机的SMC数据。在拒绝具有非常高背景的观察结果后,我们包括53个档案和33个调查观察结果。我们在五个不同的能量带产生图像。我们应用了天体测量的bohmos校正,使用安全的X射线源识别,并结合所有的图像,以产生一个马赛克,它涵盖了SMC的主体。我们提出了一个概述的XMM-牛顿观测,描述他们的分析和总结的第一个结果,将在后续论文中详细介绍。在这里,我们主要关注扩展的X射线源,如超新星遗迹(SNRs)和星系团,这些都可以在我们的X射线图像中看到。XMM-Newton调查代表了SMC在0.15-12.0 keV X射线波段的最深完整调查。我们提出了三个新的信噪比,它们的表面亮度很低,只有几个10^-14 erg·s^-1·cm^-2·arcmin^-2,范围很大。此外,几个已知的残留物似乎比以前从X射线或其他波长测量的更大,将SMC SNR的尺寸分布扩展到更大的值。

英文摘要:

Although numerous archival XMM-Newton observations existed towards the Small Magellanic Cloud (SMC) before 2009, only a fraction of the whole galaxy was covered. Between May 2009 and March 2010 we carried out an XMM-Newton survey of the SMC, in order to obtain a complete overage of both its bar and wing. Thirty-three observations of 30 different fields with a total exposure of about ne Ms filled the missing parts. We systematically processed all available SMC data from the European Photon Imaging Camera. After rejecting observations with very high background we included 53 archival and the 33 survey observations. We produced images in five different energy bands. We applied astrometric boresight corrections using secure identifications of X-ray sources and combine all the images to produce a mosaic, which covers the main body of the SMC. We present an overview of the XMM-Newton observations, describe their analysis and summarise first results which will be presented in follow-up papers in detail. Here, we mainly focus on extended X-ray sources like supernova remnants (SNRs) and clusters of galaxies which are seen in our X-ray images. The XMM-Newton survey represents the deepest complete survey of the SMC in the 0.15-12.0 keV X-ray band. We propose three new SNRs with low surface brightness of a few 10^-14 erg s^-1 cm^-2 arcmin^-2 and large extent. Also several known remnants appear larger than previously measured from X-rays or other wavelengths extending the size distribution of SMC SNRs to larger values.

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