首页> 外文会议>Optical modeling and performance predictions VI >The REgolith X-Ray Imaging Spectrometer (REXIS) for OSIRIS-REx: Identifying Regional Elemental Enrichment on Asteroids
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The REgolith X-Ray Imaging Spectrometer (REXIS) for OSIRIS-REx: Identifying Regional Elemental Enrichment on Asteroids

机译:用于OSIRIS-REx的REgolith X射线成像光谱仪(REXIS):识别小行星上的区域元素富集

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摘要

The OSIRIS-REx Mission was selected under the NASA New Frontiers program and is scheduled for launch in September of 2016 for a rendezvous with, and collection of a sample from the surface of asteroid Bennu in 2019. 101955 Bennu (previously 1999 RQ_(36)) is an Apollo (near-Earth) asteroid originally discovered by the LINEAR project in 1999 which has since been classified as a potentially hazardous near-Earth object. The REgolith X-Ray Imaging Spectrometer (REXIS) was proposed jointly by MIT and Harvard and was subsequently accepted as a student led instrument for the determination of the elemental composition of the asteroid's surface as well as the surface distribution of select elements through solar induced X-ray fluorescence. REXIS consists of a detector plane that contains 4 X-ray CCDs integrated into a wide field coded aperture telescope with a focal length of 20 cm for the detection of regions with enhanced abundance in key elements at 50 m scales. Elemental surface distributions of approximately 50-200 m scales can be detected using the instrument as a simple collimator. An overview of the observation strategy of the REXIS instrument and expected performance are presented here.
机译:OSIRIS-REx任务是根据NASA新疆界计划选定的,计划于2016年9月发射,以便在2019年与小行星Bennu会合并收集样品。101955 Bennu(之前为1999 RQ_(36)) )是阿波罗(近地)小行星,最初是由LINEAR项目于1999年发现的,此后被归类为潜在危险的近地天体。麻省理工学院和哈佛大学共同提出了REgolith X射线成像光谱仪(REXIS),并随后被接受为学生主导的仪器,用于确定小行星表面的元素组成以及通过太阳诱导X射线测定某些元素的表面分布射线荧光。 REXIS由一个探测器平面组成,该探测器平面包含4个X射线CCD,这些CCD集成到焦距为20 cm的广域编码孔径望远镜中,用于以50 m的尺度检测关键元素中丰度较高的区域。使用该仪器作为简单的准直仪,可以检测到大约50-200 m刻度的元素表面分布。此处概述了REXIS仪器的观测策略和预期性能。

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  • 来源
    《Optical modeling and performance predictions VI》|2013年|88400M.1-88400M.17|共17页
  • 会议地点 San Diego CA(US)
  • 作者单位

    Harvard College Observatory, 60 Garden Street, Cambridge, MA 02138, USA;

    Harvard College Observatory, 60 Garden Street, Cambridge, MA 02138, USA;

    Harvard College Observatory, 60 Garden Street, Cambridge, MA 02138, USA;

    Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA;

    Space Systems Lab, Massachusetts Institute of Technology, Cambridge, MA 02139, USA;

    Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA,Space Systems Lab, Massachusetts Institute of Technology, Cambridge, MA 02139, USA;

    Space Systems Lab, Massachusetts Institute of Technology, Cambridge, MA 02139, USA;

    Space Systems Lab, Massachusetts Institute of Technology, Cambridge, MA 02139, USA;

    Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA;

    Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA;

    Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA;

    Harvard College Observatory, 60 Garden Street, Cambridge, MA 02138, USA;

    Harvard College Observatory, 60 Garden Street, Cambridge, MA 02138, USA;

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