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Type Ia supernovae (SNe~Ia) in the nearby Hubble flow are excellent distance indicators in cosmology. The Zwicky Transient Facility (ZTF) has observed a large sample of supernovae from an untargeted, rolling survey, reaching $20.8, 20.6,…

The spectroscopic survey of China's Space Survey Telescope (CSST) is expected to obtain a huge number of slitless spectra, including more than one hundred million galaxy spectra and millions of active galactic nuclei (AGN) spectra. By…

Cosmology and Nongalactic Astrophysics · Physics 2024-07-02 Haitao Miao , Yan Gong , Xuelei Chen , Zhiqi Huang , Xiao-Dong Li , Hu Zhan

Stray light significantly influences the detection capabilities of astronomical telescopes. The actual stray-light level during observations depends not only on the telescope's inherent stray-light suppression capability but also on its…

Instrumentation and Methods for Astrophysics · Physics 2025-11-11 Xian Jing-Tian , Lin Lin , Fang Yue-Dong , Zhang Xin , Xu You-Hua , Meng Xian-Min , Tian Hao , Zhang Tian-Yi , Ban Zhang , Li Guo-Liang , Xu Shu-Yan , Wang Wei

The Chinese Space Station Optical Survey (CSS-OS) is a planned full sky survey operated by the Chinese Space Station Telescope (CSST). It can simultaneously perform the photometric imaging and spectroscopic slitless surveys, and will probe…

Cosmology and Nongalactic Astrophysics · Physics 2019-10-08 Yan Gong , Xiangkun Liu , Ye Cao , Xuelei Chen , Zuhui Fan , Ran Li , Xiao-Dong Li , Zhigang Li , Xin Zhang , Hu Zhan

The upcoming Vera C. Rubin Observatory's Legacy Survey of Space and Time (LSST) is expected to discover nearly a million Type Ia supernovae (SNeIa), offering an unprecedented opportunity to constrain dark energy. The vast majority of these…

We propose a new strategy of finding strongly-lensed supernovae (SNe) by monitoring known galaxy-scale strong-lens systems. Strongly lensed SNe are potentially powerful tools for the study of cosmology, galaxy evolution, and stellar…

Astrophysics of Galaxies · Physics 2018-09-19 Yiping Shu , Adam S. Bolton , Shude Mao , Xi Kang , Guoliang Li , Monika Soraisam

The Tsinghua University-National Astronomical Observatories of China (NAOC) Transient Survey (TNTS) is an automatic survey for a systematic exploration of optical transients (OTs), conducted with a 60/90 cm Schmidt telescope at Xinglong…

This paper describes the aims, objectives and first results of the observational program for the study of distant core-collapse supernovae (SNe) with redshifts z < 0.3. This work is done within the framework of an international cooperation…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-19 A. S. Moskvitin , T. A. Fatkhullin , V. V. Sokolov , V. N. Komarova , A. J. Drake , R. Roy , D. Yu. Tsvetkov

As a space telescope, the China Space Station Survey Telescope (CSST) will face significant challenges from cosmic ray (CR) contamination. These CRs will severely degrade image quality and further influence scientific analysis. Due to the…

Instrumentation and Methods for Astrophysics · Physics 2025-11-04 Yan Yu , Bin Ma , Tianmeng Zhang , Yi Hu , Yajie Zhang

The China Space Station Telescope (CSST) is a two-meter space telescope with multiple back-end instruments. The Fine Guidance Sensor (FGS) is an essential subsystem of the CSST Precision Image Stability System to ensure the required…

Anisotropies of the cosmic optical background (COB) and cosmic near-IR background (CNIRB) are capable of addressing some of the key questions in cosmology and astrophysics. In this work, we measure and analyze the angular power spectra of…

Cosmology and Nongalactic Astrophysics · Physics 2022-02-09 Ye Cao , Yan Gong , Dezi Liu , Asantha Cooray , Chang Feng , Xuelei Chen

The Large Synoptic Survey Telescope (LSST), the next-generation optical imaging survey sited at Cerro Pachon in Chile, will provide an unprecedented database of astronomical measurements. The LSST design, with an 8.4m (6.7m effective)…

Instrumentation and Methods for Astrophysics · Physics 2017-06-14 Željko Ivezić , Andrew J. Connolly , Mario Jurić

The measurement of atmospheric parameters is fundamental for scientific research using stellar spectra. The Chinese Space Station Telescope (CSST), scheduled to be launched in 2024, will provide researchers with hundreds of millions of…

Solar and Stellar Astrophysics · Physics 2024-08-21 JiaRui Rao , HaiLiang Chen , JianPing Xiong , LuQian Wang , YanJun Guo , JiaJia Li , Chao Liu , ZhanWen Han , XueFei Chen

The China Space Station Telescope (CSST) is a forthcoming Stage IV galaxy survey. It will simultaneously undertake the photometric redshift (photo-z) and slitless spectroscopic redshift (spec-z) surveys mainly for weak lensing and galaxy…

Cosmology and Nongalactic Astrophysics · Physics 2023-11-27 Zhejie Ding , Yu Yu , Pengjie Zhang

We present a forward-modeling framework to forecast the galaxies detected in the Chinese Space Station Survey Telescope (CSST) spectroscopic survey and the Square Kilometre Array (SKA) HI survey. Starting from the L-Galaxies 2020…

Astrophysics of Galaxies · Physics 2026-05-05 Yingfeng Liu , Furen Deng , Wenxiang Pei , Haitao Miao , Qi Xiong , Shuanghao Shu , Xingchen Zhou , Qi Guo , Yan Gong , Yougang Wang , Xuelei Chen

The cross-correlation of optical galaxies with the neutral hydrogen (HI) radiation intensity can enhance the signal-to-noise ratio (SNR) of the HI intensity measurement. In this paper, we investigate the cross-correlation of the galaxy…

Cosmology and Nongalactic Astrophysics · Physics 2022-09-21 Furen Deng , Yan Gong , Yougang Wang , Shuting Dong , Ye Cao , Xuelei Chen

Gravitationally lensed supernovae (glSNe) are a powerful tool for exploring the realms of astronomy and cosmology. Time-delay measurements and lens modeling of glSNe can provide a robust and independent method for constraining the expansion…

High Energy Astrophysical Phenomena · Physics 2025-06-25 Elahe Khalouei , Arman Shafieloo , Alex G. Kim , Ryan E. Keeley , William Sheu , Gregory S. H. Paek , Myungshin Im , Xiaosheng Huang , Hyung Mok Lee

The internal structure of dark matter halos on sub-galactic scales remains a key open question, particularly in the context of the core-cusp problem. Ultra-faint dwarf galaxies (UFDs), owing to their extreme dark matter dominance, provide a…

Astrophysics of Galaxies · Physics 2026-04-24 Yixi Tao , Haijun Tian , Bin Yue , Jorge Peñarrubia

Double source plane strong lensing (DSPL) systems offer a robust, independent probe of cosmological parameters. The Chinese Space Station Telescope (CSST) is expected to discover hundreds of DSPLs, yet the survey modes and system…

Cosmology and Nongalactic Astrophysics · Physics 2026-01-22 Bei-Chen Wu , Xiaoyue Cao , Nan Li , Yan Gong , Shenzhe Cui , Di Wu , Tong Zhao , Junhui Yan

We present forecasts for the $E_G$ statistic using redshift distributions of realistic mock galaxy samples from the upcoming Chinese Space Station Survey Telescope (CSST). The dominant uncertainty in $E_G$ stems from the redshift space…

Cosmology and Nongalactic Astrophysics · Physics 2026-01-27 Yu Song , Yi Zheng