Publications (41)
Efficient Catalog Matching with Dropout Detection
Dongwei Fan, Tamás Budavári, Alexander S. Szalay +2
Not only source catalogs are extracted from astronomy observations. Their sky coverage is always carefully recorded and used in statistical analyses, such as correlation and lumino…
A Highly Efficient Cross-matching Scheme using Learned Index Structure
Phu-Minh Lam, Dongwei Fan, Hongbo Wei +6
Spatial data fusion is a bottleneck when it meets the scale of 10 billion records. Cross-matching celestial catalogs is just one example of this. To challenge this, we present a fr…
The Galactic extinction and reddening from the South Galactic Cap U-band Sky Survey: u band galaxy number counts and color distribution
Linlin Li, Shiyin Shen, Jinliang Hou +19
We study the integral Galactic extinction and reddening based on the galaxy catalog of the South Galactic Cap U-band Sky Survey (SCUSS), where band galaxy number counts and $u-…
CSST WL preparation I: forecast the impact from non-Gaussian covariances and requirements on systematics-control
Ji Yao, Huanyuan Shan, Ran Li +11
The precise estimation of the statistical errors and accurate removal of the systematical errors are the two major challenges for the stage IV cosmic shear surveys. We explore thei…
AstroCloud, a Cyber-Infrastructure for Astronomy Research: Architecture
Jian Xiao, Ce Yu, Chenzhou Cui +13
AstroCloud is a cyber-Infrastructure for Astronomy Research initiated by Chinese Virtual Observatory (China-VO) under funding support from NDRC (National Development and Reform com…
Einstein Probe discovery of EP240408a: a peculiar X-ray transient with an intermediate timescale
Wenda Zhang, Weimin Yuan, Zhixing Ling +136
We report the discovery of a peculiar X-ray transient, EP240408a, by Einstein Probe (EP) and follow-up studies made with EP, Swift, NICER, GROND, ATCA and other ground-based multi-…
Enhanced Management of Personal Astronomical Data with FITSManager
Chenzhou Cui, Dongwei Fan, Yongheng Zhao +5
Although the roles of data centers and computing centers are becoming more and more important, and on-line research is becoming the mainstream for astronomy, individual research ba…
Identification of a dwarf galaxy stream in Gaia, and its possible association with the VPOS structure
Hao Tian, Chao Liu, Xiang-Xiang Xue +6
Low surface density streams are important tracers to study the formation and evolution of the Milky Way. Using the accurate astrometric measurements from Gaia mission, we discover…
The Second Data Release of the Beijing-Arizona Sky Survey
Hu Zou, Tianmeng Zhang, Zhimin Zhou +28
This paper presents the second data release (DR2) of the Beijing-Arizona Sky Survey (BASS). BASS is an imaging survey of about 5400 deg in and bands using the 2.3 m Bok…
AstroCloud, a Cyber-Infrastructure for Astronomy Research: Data Archiving and Quality Control
Boliang He, Chenzhou Cui, Dongwei Fan +10
AstroCloud is a cyber-Infrastructure for Astronomy Research initiated by Chinese Virtual Observatory (China-VO) under funding support from NDRC (National Development and Reform com…
Photometric redshift estimation for emission line galaxies of DESI Legacy Imaging Surveys by CNN-MLP
Shirui Wei, Changhua Li, Yanxia Zhang +13
Emission Line Galaxies (ELGs) are crucial for cosmological studies, particularly in understanding the large-scale structure of the Universe and the role of dark energy. ELGs form a…
Matching Radio Catalogs with Realistic Geometry: Application to SWIRE and ATLAS
Dongwei Fan, Tamás Budavári, Ray P. Norris +1
Crossmatching catalogs at different wavelengths is a difficult problem in astronomy, especially when the objects are not point-like. At radio wavelengths an object can have several…
Efficient Selection of Quasar Candidates Based on Optical and Infrared Photometric Data Using Machine Learning
Xin Jin, Yanxia Zhang, Jingyi Zhang +3
We aim to select quasar candidates based on the two large survey databases, Pan-STARRS and AllWISE. Exploring the distribution of quasars and stars in the color spaces, we find tha…
Deep learning-based astronomical multimodal data fusion: A comprehensive review
Wujun Shao, Dongwei Fan, Chenzhou Cui +3
With the rapid advancements in observational technologies and the widespread implementation of large-scale sky surveys, diverse electromagnetic wave data (e.g., optical and infrare…
The Third Data Release of the Beijing-Arizona Sky Survey
Hu Zou, Xu Zhou, Xiaohui Fan +45
The Beijing-Arizona Sky Survey (BASS) is a wide and deep imaging survey to cover a 5400 deg area in the Northern Galactic Cap with the 2.3m Bok telescope using two filters (…
Optimal Probabilistic Catalogue Matching for Radio Sources
Dongwei Fan, Tamás Budavári, Ray P. Norris +1
Cross-matching catalogues from radio surveys to catalogues of sources at other wavelengths is extremely hard, because radio sources are often extended, often consist of several spa…
Photometric Redshift Estimation of BASS DR3 Quasars by Machine Learning
Changhua Li, Yanxia Zhang, Chenzhou Cui +9
Correlating BASS DR3 catalogue with ALLWISE database, the data from optical and infrared information are obtained. The quasars from SDSS are taken as training and test samples whil…
AstroCloud: A Distributed Cloud Computing and Application Platform for Astronomy
Chenzhou Cui, Boliang He, Ce Yu +28
Virtual Observatory (VO) is a data-intensively online astronomical research and education environment, which takes advantages of advanced information technologies to achieve seamle…
IVOA HiPS Implementation in the Framework of WorldWide Telescope
Yunfei Xu, Chenzhou Cui, Dongwei Fan +9
The WorldWide Telescope(WWT) is a scientific visualization platform which can browse deep space images, star catalogs, and planetary remote sensing data from different observation…
A Conception of Engineering Design for Remote Unattended Operation Public Observatory
Jun Han, Dongwei Fan, Chenzhou Cui +9
Public observatory project is playing more and more important role in science popularization education and scientific research, and many amateur astronomers also have began to buil…
Data-driven stellar intrinsic colors and dust reddenings for spectro-photometric data: From the blue-edge method to a machine-learning approach
He Zhao, Shu Wang, Biwei Jiang +4
Intrinsic colors (ICs) of stars are essential for the studies on both stellar physics and dust reddening. In this work, we developed an XGBoost model to predict the ICs with the at…
Update of the China-VO AstroCloud
Chenzhou Cui, Ce Yu, Jian Xiao +19
As the cyber-infrastructure for Astronomical research from Chinese Virtual Observatory (China-VO) project, AstroCloud has been archived solid progresses during the last one year. P…
Photometric redshift estimation of galaxies in the DESI Legacy Imaging Surveys
Changhua Li, Yanxia Zhang, Chenzhou Cui +14
The accurate estimation of photometric redshifts plays a crucial role in accomplishing science objectives of the large survey projects. The template-fitting and machine learning ar…
A Large and Precise All-Sky Photometric Standard Star Dataset Across More Than 200 Passbands
Kai Xiao, Yang Huang, Haibo Yuan +12
High-precision photometric standard stars play a key role in enabling accurate photometric calibration and advancing various fields of astronomy. However, due to limitations in cal…
South Galactic Cap u-band Sky Survey (SCUSS): Data Release
Hu Zou, Xu Zhou, Zhaoji Jiang +15
The SCUSS is a deep -band imaging survey in the south Galactic cap using the 2.3m Bok telescope. The survey observations were completed in the end of 2013, covering an area of a…
The First Data Release of the Beijing-Arizona Sky Survey
Hu Zou, Tianmeng Zhang, Zhimin Zhou +25
The Beijing-Arizona Sky Survey (BASS) is a new wide-field legacy imaging survey in the northern Galactic cap using the 2.3m Bok telescope. The survey will cover about 5400 deg…
GSED: The Galactic Stellar Extinction Database
Baisong Zhang, Bingqiu Chen, Dongwei Fan +9
Reliable extinction correction is essential for nearly all astrophysical studies within the Galaxy. We present the Galactic Stellar Extinction Database (GSED, https://nadc.china-vo…
A Gaia-linked High-purity QSO Candidate Catalog in Selected Fields with Extinction-binned Calibration and Spectrum-informed Training
Zi-Huang Cao, Zhao-Xiang Qi, Juan-Juan Ren +11
We present an extinction-calibrated, Gaia-source-level QSO candidate catalog for selected fields, designed as a high-purity input catalog for fiber-spectroscopic follow-up rather t…
The LAMOST Data Archive and Data Release
Boliang He, Dongwei Fan, Chenzhou Cui +3
The Large sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) is the largest optical telescope in China. In last four years, the LAMOST telescope has published four editio…
Project Overview of the Beijing-Arizona Sky Survey
Hu Zou, Xu Zhou, Xiaohui Fan +16
The Beijing-Arizona Sky Survey (BASS) is a wide-field two-band photometric survey of the Northern Galactic Cap using the 90Prime imager on the 2.3 m Bok telescope at Kitt Peak. It…
GWOPS: A VO-technology Driven Tool to Search for the Electromagnetic Counterpart of Gravitational Wave Event
Yunfei Xu, Dong Xu, Chenzhou Cui +11
The search and follow-up observation of electromagnetic (EM) counterparts of gravitational waves (GW) is a current hot topic of GW cosmology. Due to the limitation of the accuracy…
Astronomical Knowledge Entity Extraction in Astrophysics Journal Articles via Large Language Models
Wujun Shao, Pengli Ji, Dongwei Fan +6
Astronomical knowledge entities, such as celestial object identifiers, are crucial for literature retrieval and knowledge graph construction, and other research and applications in…
Homogenization of the Stetson Photometry with the BEST Database
Zhirui Li, Bowen Huang, Kai Xiao +5
As one of the most widely recognized high-quality standard stars, the Stetson standards have been extensively used as a photometric reference for calibrating other surveys. In this…
Identification of BASS DR3 Sources as Stars, Galaxies and Quasars by XGBoost
Changhua Li, Yanxia Zhang, Chenzhou Cui +11
The Beijing-Arizona Sky Survey (BASS) Data Release 3 (DR3) catalogue was released in 2019, which contains the data from all BASS and the Mosaic z-band Legacy Survey (MzLS) observat…
Towards an Astronomical Science Platform: Experiences and Lessons Learned from Chinese Virtual Observatory
Chenzhou Cui, Yihan Tao, Changhua Li +16
In the era of big data astronomy, next generation telescopes and large sky surveys produce data sets at the TB or even PB level. Due to their large data volumes, these astronomical…
FALCO: a Foundation model of Astronomical Light Curves for time dOmain astronomy
Xiaoxiong Zuo, Yihan Tao, Yang Huang +13
Time-domain surveys have advanced astronomical research by revealing diverse variable phenomena, from stellar flares to transient events. The scale and complexity of survey data, a…
Mock Observations for the CSST Mission: Main Surveys -- the Mock Catalogue
Cheng-Liang Wei, Yu Luo, Hao Tian +17
The Chinese Space Station Survey Telescope (CSST) is a flagship space mission, designed to carry out a large-area sky survey to explore the nature of dark matter and dark energy in…
AstroCloud, a Cyber-Infrastructure for Astronomy Research: Data Access and Interoperability
Dongwei Fan, Boliang He, Jian Xiao +12
Data access and interoperability module connects the observation proposals, data, virtual machines and software. According to the unique identifier of PI (principal investigator),…
A hybrid architecture for astronomical computing
Changhua Li, Chenzhou Cui, Boliang He +17
With many large science equipment constructing and putting into use, astronomy has stepped into the big data era. The new method and infrastructure of big data processing has becom…
The first comprehensive Milky Way stellar mock catalogue for the Chinese Space Station Telescope Survey Camera
Yang Chen, Xiaoting Fu, Chao Liu +9
The Chinese Space Station Telescope (CSST) is a cutting-edge two-meter astronomical space telescope currently under construction. Its primary Survey Camera (SC) is designed to cond…
The First Release of the AST3-1 Point Source Catalogue from Dome A, Antarctica
Bin Ma, Zhaohui Shang, Yi Hu +35
The three Antarctic Survey Telescopes (AST3) aim to carry out time domain imaging survey at Dome A, Antarctica. The first of the three telescopes (AST3-1) was successfully deployed…