Dark Energy Survey Year 3 Results: Point-Spread Function Modeling

宜居世界天文台暗物质次晕探测的点扩散函数要求

Point spread function requirements for dark matter subhalo detection with the Habitable Worlds Observatory

该研究模拟HWO观测强透镜星系，发现利用弧信噪比预选透镜可显著降低暗物质次晕探测质量阈值，且PSF建模误差对灵敏度影响有限，表明HWO后续观测有望揭示暗物质本质。

The five largest satellites of Uranus: astrometric observations spread over 29 years at the Pico dos Dias Observatory

We present the astrometry of the five largest satellites of Uranus from observations spread over almost three decades with photographic plates and CCDs (mainly), taken at the Pico dos Dias Observatory - Brazil. All positions presented here are obtained from the reanalysis of measurements and images used in previous publications. Reference stars are those from the Gaia Early Data Release 3 (Gaia EDR3) allowing, in addition to a higher accuracy, a larger number of positions of the largest satellites as compared to our previous works. From 1982 to 1987, positions were obtained from photographic p…

暗能量巡天第6年结果：点扩散函数建模

Dark Energy Survey Year 6 Results: Point-spread Function Modeling

本研究基于暗能量巡天第6年数据，通过改进PIFF软件的恒星样本纯度、颜色依赖建模和四阶矩诊断提升PSF建模精度，首次纳入g波段用于弱引力透镜分析，为下一代巡天项目奠定基础。

暗物质粒子探测卫星：十年在轨运行表现与科学成果

Dark Matter Particle Explorer: Ten-Year On-Orbit Performance and Scientific Outcomes

本文介绍了中国科学院空间科学先导专项的首颗空间科学卫星DAMPE（悟空），概述其在轨十年表现，重点阐述其测量全电子与原子核能谱、搜索高能伽马射线线等核心科学成果。

Dark Hole Maintenance and A Posteriori Intensity Estimation in the Presence of Speckle Drift in a High-Contrast Space Coronagraph

Direct exoplanet imaging via coronagraphy requires maintenance of high contrast in a dark hole for lengthy integration periods. Wavefront errors that change slowly over that time accumulate and cause systematic errors in the star's Point Spread Function (PSF) which limit the achievable signal-to-noise ratio of the planet. In this paper we show that estimating the speckle drift can be achieved via intensity measurements in the dark hole together with dithering of the deformable mirrors to increase phase diversity. A scheme based on an Extended Kalman Filter and Electric Field Conjugation is pro…

The cross-correlation search for a hot spot of gravitational waves : Numerical study for point spread function

The cross-correlation search for gravitational wave, which is known as 'radiometry', has been previously applied to map of the gravitational wave stochastic background in the sky and also to target on gravitational wave from rotating neutron stars/pulsars. We consider the Virgo cluster where may be appear as `hot spot' spanning few pixels in the sky in radiometry analysis. Our results show that sufficient signal to noise ratio can be accumulated with integration times of the order of a year. We also construct numerical simulation of radiometry analysis, assuming current constructing/upgrading …