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十字臂是龙虾眼望远镜点扩散函数（PSF）的主要特征。由于所有由龙虾眼望远镜观测的目标都会受十字臂PSF的调制，因此给目标检测算法研发带来了困难。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。1200秒变化时，检测纯度都能保持在90%以上）。关于智能光学成像实验室 智能光学成像实验室由贾鹏博士建立，面向国家基础科学装置和战略需求，开展光电系统数字孪生及智能信号处理研究，研究成果服务我国空间站巡天望远镜、欧洲极大光学望远镜、大光学红外望远镜 ...近年来，在国家自然科学基金、载人航天工程和平方公里阵专项项目支持下，融合天文仪器数字孪生和智能数据处理技术开展天文目标信息自动提取和未知天文目标发现研究，助力我国科学实现从0到1的突破。
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same profile belong to the same manifold space, we propose a nonparametric point-spread function -- PSF-NET ...The PSF-NET has a cycle convolutional neural network structure and is a statistical representation of ...Testing the PSF-NET with simulated and real observation data, we find that a well trained PSF-NET can ...Besides, we further use the impulse response of the PSF-NET, which can be viewed as the statistical mean ...PSF, to analyze interpretation properties of the PSF-NET.
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same profile belong to the same manifold space, we propose a nonparametric point-spread function -- PSF-NET ...The PSF-NET has a cycle convolutional neural network structure and is a statistical representation of ...Testing the PSF-NET with simulated and real observation data, we find that a well trained PSF-NET can ...Besides, we further use the impulse response of the PSF-NET, which can be viewed as the statistical mean ...PSF, to analyze interpretation properties of the PSF-NET.
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same profile belong to the same manifold space, we propose a nonparametric point-spread function -- PSF-NET ...The PSF-NET has a cycle convolutional neural network structure and is a statistical representation of ...Testing the PSF-NET with simulated and real observation data, we find that a well trained PSF-NET can ...Besides, we further use the impulse response of the PSF-NET, which can be viewed as the statistical mean ...PSF, to analyze interpretation properties of the PSF-NET.
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same profile belong to the same manifold space, we propose a nonparametric point-spread function -- PSF-NET ...The PSF-NET has a cycle convolutional neural network structure and is a statistical representation of ...Testing the PSF-NET with simulated and real observation data, we find that a well trained PSF-NET can ...Besides, we further use the impulse response of the PSF-NET, which can be viewed as the statistical mean ...PSF, to analyze interpretation properties of the PSF-NET.
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科学家通过国际合作方式，使用横跨亚欧大陆8个国家的12台射电望远镜开展了长期观测，精准定位了快速射电暴的天空位置。此次测量结果显示，这个FRB具有重复爆发性，它起源于漩涡星系M81中的一个大量年老恒星构成的球状星团，距离地球大约1200万光年。www.nature.com/articles/s41550-021-01569-9 图 1 艺术想象图：极其快速、极其明亮的射电信号来自于意料之外位置，也就是图片左部的靠近漩涡星系M81的年老恒星星团 ...蓝白色脉冲显示“闪电”在几十毫秒过程的亮度变化。版权 D. Futselaar/ASTRON, artsource.nl 。
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The point spread function (PSF) reflects states of a telescope and plays an important role in the development ...of data-processing methods, such as PSF-based astrometry, photometry, and image restoration.However, for wide field small aperture telescopes (WFSATs), estimating PSF in any position of the whole ...optical system are quite complex and the signal-to-noise ratio of star images is often too low for PSF ...applications in PSF estimation.
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The point spread function (PSF) reflects states of a telescope and plays an important role in the development ...of data-processing methods, such as PSF-based astrometry, photometry, and image restoration.However, for wide field small aperture telescopes (WFSATs), estimating PSF in any position of the whole ...optical system are quite complex and the signal-to-noise ratio of star images is often too low for PSF ...applications in PSF estimation.
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The point spread function (PSF) reflects states of a telescope and plays an important role in the development ...of data-processing methods, such as PSF-based astrometry, photometry, and image restoration.However, for wide field small aperture telescopes (WFSATs), estimating PSF in any position of the whole ...optical system are quite complex and the signal-to-noise ratio of star images is often too low for PSF ...applications in PSF estimation.
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The point spread function (PSF) reflects states of a telescope and plays an important role in the development ...of data-processing methods, such as PSF-based astrometry, photometry, and image restoration.However, for wide field small aperture telescopes (WFSATs), estimating PSF in any position of the whole ...optical system are quite complex and the signal-to-noise ratio of star images is often too low for PSF ...applications in PSF estimation.
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近期，国际数据委员会（CODATA）、世界数据系统（WDS）以及研究数据联盟（RDA）联合宣布，2025年国际数据周（IDW2025）现已开放早鸟注册。即刻报名，可享早鸟优惠价格！会议注册费涵盖IDW 2025期间所有报告讨论、参观展览，以及日常餐饮，您还可根据个人需要购买晚宴门票。
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在进一步查验后，管理员张宓将其上报至天文电报中央局（CBAT）和暂现源名称服务网（TNS），该候选体获得编号AT 2024ryu、PNV J00435777+4113357，内部编号PSP24T。发现者：麦梓阳、赵经远、徐建林、张宓、唐磊明、李言蹊、严小畅、周文杰、孙国佑、阮建高、高兴及PSP团队 发现亮度：19.84星等（无滤镜） 发现时间：2024年8月12日03时11分47.904秒 ...followups/J00435777+4113357.html 图2 CBAT页面 8月13日凌晨，捷克科学院天文研究所昂德列约夫天文台Kamil Hornoch等人发布了第16768号天文学家电报 ...
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在管理员徐建林、张宓等人进一步查验后，确认这是一颗真实目标，于是张宓将其上报至天文电报中央局（CBAT）和暂现源名称服务网（TNS）“占坑”，待稍后其他参与者从PSP项目网站提交后 ...刘行、梁弘志、徐建林、张宓、唐磊明、李言蹊、严小畅、周文杰、赵经远、孙国佑、阮建高、高兴，以及PSP团队 发现亮度：17.72等（无滤镜） 发现时间：2024年10月20日20时52分32.736秒 ...CBAT（上）和TNS（下）页面 当晚约23时和次日凌晨3时许，拉古纳大学Guillermo Villa等人和昂德列约夫天文台Kamil Hornoch等人分别发布了第16869号和第16870号天文学家电报 ...我们在世界时10月24日0时43分，使用俄罗斯6米大型地平装置望远镜 (BTA) 上的SCORPIO多模焦距缩减器，获得了三张曝光时间为10秒的V波段图像和两张曝光时间为 600 秒的光谱（光谱分辨率约 ...光谱观测期间天空条件不佳（有密集的卷云），视宁度约为1.5角秒。 测量的星等为V = 17.26 ± 0.04。
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在等待补拍图像的同时，管理员张宓已将该候选体上报至天文电报中央局暂现天体证认页（CBAT TOCP）“占坑”，该候选体获得编号PNV J00473256+3938102。3938102（= AT 2021aceg= PSP21ac） 发现者：唐磊明、李言蹊、周文杰、徐建林、丁乙、阮建高、赵经远、孙国佑、张宓、高兴 发现时间：2021年10月25日21时40分41.088秒 ...2021aceg与M31的角距离约为1.8度，使用Aladin和stellarium测量，AT 2021aceg位于M31东南方向，分别测得距离M31星系核心1.857度（Aladin测量）、1度51角分15角秒（ ...两三天过去了，Steven博士仍然没有回复，也没有发布天文学家电报（ATel）或将光谱及分类上报到TNS。大家猜测要么天气不好，要么受火山影响无法观测。抛开这些不说， AT 2021aceg的发现应当也有助于我们认识了解星流、认识星系和暗物质，具有非常大的科研意义，让我们期待对它的后续研究。
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这里是处理后的多频道数据文件。数据发表在 Shao et al. 2017, ApJ, 845, 138; Wang et al. 2019, ApJ, 887, 40 ...
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the left column shows the radial profile of the surface brightness (open circles with error bars), PSF ...component (blue), Se ́rsic (red) component, and total model (purple; PSF + Se ́rsic).left to right, the original data, best-fit total model, data with the nucleus component modeled by a PSF ...The best-fit Se ́rsic index, half-light radius (Re), and host fraction fhost ≡ Se ́rsic / (PSF + Se ́ ...
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the left column shows the radial profile of the surface brightness (open circles with error bars), PSF ...component (blue), Se ́rsic (red) component, and total model (purple; PSF + Se ́rsic).left to right, the original data, best-fit total model, data with the nucleus component modeled by a PSF ...The best-fit Se ́rsic index, half-light radius (Re), and host fraction fhost ≡ Se ́rsic / (PSF + Se ́ ...
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the left column shows the radial profile of the surface brightness (open circles with error bars), PSF ...component (blue), Se ́rsic (red) component, and total model (purple; PSF + Se ́rsic).left to right, the original data, best-fit total model, data with the nucleus component modeled by a PSF ...The best-fit Se ́rsic index, half-light radius (Re), and host fraction fhost ≡ Se ́rsic / (PSF + Se ́ ...