• The ESA's X-ray Multi-mirror Mission (XMM-Newton) created a new high-quality version of the XMM-Newton ...
    the Sloan Digital Sky Survey (SDSS) DR12 photometric data base and the AllWISE data base; we then get X-ray ...
    sources with information from the X-ray, optical, and/or infrared bands and obtain the XMM-WISE, XMM-SDSS ...
    For the sample from the X-ray band, a rotation-forest classifier performs the best.
    Their membership of and membership probabilities for individual X-ray sources are assigned.
  • The ESA's X-ray Multi-mirror Mission (XMM-Newton) created a new high-quality version of the XMM-Newton ...
    the Sloan Digital Sky Survey (SDSS) DR12 photometric data base and the AllWISE data base; we then get X-ray ...
    sources with information from the X-ray, optical, and/or infrared bands and obtain the XMM-WISE, XMM-SDSS ...
    For the sample from the X-ray band, a rotation-forest classifier performs the best.
    Their membership of and membership probabilities for individual X-ray sources are assigned.
  • The ESA's X-ray Multi-mirror Mission (XMM-Newton) created a new high-quality version of the XMM-Newton ...
    the Sloan Digital Sky Survey (SDSS) DR12 photometric data base and the AllWISE data base; we then get X-ray ...
    sources with information from the X-ray, optical, and/or infrared bands and obtain the XMM-WISE, XMM-SDSS ...
    For the sample from the X-ray band, a rotation-forest classifier performs the best.
    Their membership of and membership probabilities for individual X-ray sources are assigned.
  • The ESA's X-ray Multi-mirror Mission (XMM-Newton) created a new high-quality version of the XMM-Newton ...
    the Sloan Digital Sky Survey (SDSS) DR12 photometric data base and the AllWISE data base; we then get X-ray ...
    sources with information from the X-ray, optical, and/or infrared bands and obtain the XMM-WISE, XMM-SDSS ...
    For the sample from the X-ray band, a rotation-forest classifier performs the best.
    Their membership of and membership probabilities for individual X-ray sources are assigned.
  • 最近,国家天文科学数据中心和新昌星空文化传媒合作,在万维望远镜(WWT)北京社区资源库里上线了一组360度×180度的新昌全景图,从鼓山公园、新昌体育场、翡翠山南复线、孝行路,还有孝行路十九峰路口等多个视角全方位地展现了如诗如画的新昌小城。 用户可以根据提示更新软件,或直接在万维望远镜北京社区(wwt.china-vo.org)下载最新版本欣赏这套全景图,领略新昌风景。 图1:万维望远镜中新加入的新昌风光全景图 一般来说,画面越大带给人的沉浸感就越强,通过逼真的细节展示,为我们呈现出更加震撼的视觉冲击力。巨幕、弧幕、环幕、球幕,随着画面在人可视范围中占 ...
  • This is code and data for the paper "Target Detection Framework for Lobster Eye X-Ray Telescopes with ...
  • This is code and data for the paper "Target Detection Framework for Lobster Eye X-Ray Telescopes with ...
  • IERS Bulletin A contains Earth orientation parameters x/y pole, UT1-UTC and their errors at daily intervals ...
  • This is code and data for the paper "Target Detection Framework for Lobster Eye X-Ray Telescopes with ...
  • This is code and data for the paper "Target Detection Framework for Lobster Eye X-Ray Telescopes with ...
  • 为了促进国内在X射线双星领域的学者之间的交流与合作,兹定于2023年11月22-25日在武汉市举办第五届“X射线双星的多波段研究”研讨会,主要交流X射线双星、致密天体物理及相关领域的研究进展,促进此领域的合作 ...
  • 基于当前主流的日冕极紫外波段成像数据,首次利用深度学习方法预测日冕软X射线波段辐射。
    论文链接:点击这里。 日冕作为太阳大气的最外层,由十分稀薄的、温度高达百万度甚至千万度的等离子体组成。
    这一物理过程是日冕极紫外波段和软X射线波段辐射的主要来源。人们因此可在极紫外波段和软X射线波段对日冕等离子体结构进行成像探测。
    而另外一台卫星Hinode的软X射线望远镜XRT每天只在几个固定的时刻对日冕进行少量的全日面软X射线波段成像。
    研究表明该模型能构造出与真实观测一致的软X射线数据,从而能够缓解当前关于日冕软X射线观测的缺失。
  • 该仪器采用了先进的微孔龙虾眼X射线聚焦成像技术,观测视场可达340 平方度(18.6度x18.6度),是国际上首个宽视场X射线聚焦成像望远镜。
    相比国际上其它X射线聚焦成像望远镜,其视场大小提高了100倍左右。截至目前,仪器已开展了为期4天的在轨测试观测,成功获得了一批天体的真实X 射线实测图像和能谱。
    图1:宽视场 X射线望远镜模块对银河系中心天区单次观测获得的X射线图像(视场18.6度x18.6度)。
    图2:对银河系中心天区单次观测获得的X射线图像(左图)和仿真图像(右图),左右图的观测时长同为800秒,视场18.6度x18.6度。
    结果显示,单次观测就能够同时探测到多个方向上的X 射线源,包含了恒星级质量黑洞和中子星。观测也捕捉到一个X射线辐射增亮数倍的中子星X射线双星(图2左)。
  • stellar spectra obtained by LAMOST low resolution survey during October 24th 2011 and June 8th 2019x.
  • type star spectra obtained by LAMOST low resolution survey during October 24th 2011 and June 8th 2019x.
  • stellar spectra obtained by LAMOST low resolution survey during October 24th 2011 and June 8th 2019x.
  • 近日,国家天文台张彦霞研究员、赵永恒研究员和北京大学吴学兵教授基于中国郭守敬望远镜(LAMOST)和美国斯隆数字巡天(SDSS)的光谱数据,结合欧洲航天局的X射线牛顿天文望远镜(XMM-Newton)数据 ...
    基于此,研究人员通过机器学习方法构建了适合不同波段样本的最优分类器,为X射线牛顿天文望远镜第九次发布数据(DR9)提供了分类预测和概率。
    论文链接:点击这里。 二十世纪以来,随着各类地基和空间大型天文观测设备的研制和运行,天文观测覆盖了从射电、红外、可见光、紫外至X射线和γ射线的全电磁波段。
    图1:XMM-Newton望远镜(图源:ESA) 欧洲航天局(ESA)于1999年发射的X射线牛顿天文望远镜(XMM-Newton),具有极高的光谱分辨能力,其目的是对宇宙天体进行高质量的X射线观测, ...
    3558颗恒星、21040个类星体的已知样本,该样本仅占X射线牛顿天文望远镜第九次发布总观测数据的5.78%,这就意味着X射线牛顿天文望远镜DR9数据集的绝大多数X射线观测数据仍为未知天体。
  • 计划中的x射线望远镜hub(热宇宙重子测量器)的任务是测量热气体的性质。为了讨论中心的科学目标,我们组织了一系列研讨会。第一届是2018年在上海举行的。
    涉及的主要主题: circumgalactic介质 星系际介质 AGN和恒星反馈 热星际介质 AGN 星系团 漫射x射线背景 超新星残骸 任务 | Aims and Scope ...
    Measuring the properties of hot gas is the task of the planned X-ray telescope HUBS (Hot Universe Baryons ...
    intergalactic medium AGN and stellar feedback Hot interstellar medium AGN Galaxy clusters The diffuse X-ray ...
  • 论文链接:点击这里。 宇宙中天体发出的电磁波携带着天体的活动信息,是人类与天体交流的信使。
    从信号发射模式上区分,当前主要有两类X射线源,一类是人类已知的长期发射信号的X射线源,例如天鹅座X-1等;另外一种是随机发射信号的X射线源,这类天体有可能在天空任意位置,任意时刻发射信号,因此又被称为暂现源 ...
    X射线光子能量较高,传统的光学系统无法实现有效成像,因此,EP-WXT采用了龙虾眼望远镜(LE)。
    图2 LEIA(爱因斯坦探测器任务的宽视场x射线望远镜的探路者)对银河系中心天区单次观测获得的X射线图像(左图)和模拟图像(右图),左右图的观测时长同为800秒,视场18.6度x18.6度。
    研究团队产生Level-1图像(256 x 256像素)用于极亮和明亮目标的检测,产生Level-2图像(512 x 512像素)用于普通目标的检测。
  • With the advent of eROSITA (launched in 2019), many many of galaxy groups will be be detected by X-ray ...
    , complementing and ongoing future X-ray (XMM-Newton, Chandra, XRISM, Athena) optical (Euclid, DES, Vera ...
    populations in optical and IR bands; revise the properties of the warm, hot intra-group medium gas with X-ray ...
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