A5055910822- Astronomical Observations and Instrumentation
- Astronomy and Astrophysical Research
- Advanced Computational Techniques and Applications
- Stellar, planetary, and galactic studies
- Galaxies: Formation, Evolution, Phenomena
- Gamma-ray bursts and supernovae
- Distributed and Parallel Computing Systems
- Advanced Data Storage Technologies
- Scientific Computing and Data Management
- Astrophysics and Cosmic Phenomena
- Adaptive optics and wavefront sensing
- Inertial Sensor and Navigation
- Advanced Database Systems and Queries
- Historical Astronomy and Related Studies
- Impact of Light on Environment and Health
- Astrophysical Phenomena and Observations
- Cloud Computing and Resource Management
- Optical Systems and Laser Technology
- Radio Astronomy Observations and Technology
- Scientific Research and Discoveries
- Infrared Target Detection Methodologies
- Bayesian Methods and Mixture Models
- Pulsars and Gravitational Waves Research
- Data Mining Algorithms and Applications
- Calibration and Measurement Techniques
National Astronomical Observatories
2014-2024
Chinese Academy of Sciences
2014-2024
University of Chinese Academy of Sciences
2020-2024
Beijing University of Technology
2015
The Large sky Area Multi-Object Spectroscopic Telescope (LAMOST) General Survey is a spectroscopic survey that will eventually cover approximately half of the celestial sphere and collect 10 million spectra stars, galaxies QSOs. Objects both in pilot first year general are included LAMOST First Data Release (DR1). started October 2011 ended June 2012, data have been released to public as Pilot August 2012. September completed its operation 2013. DR1 includes total 1202 plates containing...
The Beijing–Arizona Sky Survey (BASS) is a wide-field two-band photometric survey of the northern Galactic Cap using 90Prime imager on 2.3 m Bok telescope at Kitt Peak. It four-year collaboration between National Astronomical Observatory China and Steward Observatory, University Arizona, serving as one three imaging surveys to provide input catalogs for target selection Dark Energy Spectroscopic Instrument (DESI) project. BASS will take up 240 dark/gray nights cover an area about 5400 deg2...
Abstract Ancient stellar observations are a valuable cultural heritage, profoundly influencing both domains and modern astronomical research. The Shi's Star Catalog (石氏星经), the oldest extant star catalog in China, faces controversy regarding its observational epoch. Determining this epoch via precession assumes accurate ancient coordinates correspondence with contemporary stars, posing significant challenges. This study introduces novel method using Generalized Hough Transform to ascertain...
Ancient stellar observations are a valuable cultural heritage, profoundly influencing both domains and modern astronomical research. The \textit{Shi's Star Catalog}, the oldest extant star catalog in China, faces controversy regarding its observational epoch. Determining this epoch via precession assumes accurate ancient coordinates correspondence with contemporary stars, posing significant challenges. This study introduces novel method using Generalized Hough Transform to ascertain...
Abstract The Beijing–Arizona Sky Survey (BASS) is a wide and deep imaging survey that covers 5400 deg 2 area in the northern Galactic cap with 2.3 m Bok telescope using two filters ( g r bands). Mosaic z -band Legacy (MzLS) same band 4 Mayall telescope. These surveys will be used for spectroscopic targeting by Dark Energy Spectroscopic Instrument (DESI) northernmost portion of DESI footprint. This paper describes third data release (DR3) BASS, which contains photometric from all BASS MzLS...
We present preliminary results of the quasar survey in Large Sky Area Multi- Object Fiber Spectroscopic Telescope (LAMOST) first data release (DR1), which includes pilot and year regular survey. There are 3921 quasars identified with reliability, among 1180 new discovered These at low to median redshifts, highest z 4.83. compile emission line measurements around H{\alpha}, H{\beta}, Mg II, C IV regions for quasars. The continuum luminosities inferred from SDSS photo- metric model fitting as...
The SCUSS is a deep $u$-band imaging survey in the south Galactic cap using 2.3m Bok telescope. observations were completed end of 2013, covering an area about 5000 square degrees. We release data region with 4000 deg$^2$ that mostly covered by Sloan digital sky survey. products contain calibrated single-epoch images, stacked photometric catalogs, and catalog star proper motions derived Peng et al, 2015. median seeing magnitude limit ($5\sigma$) are 2".0 23.2 mag, respectively. There 8...
The Beijing-Arizona Sky Survey (BASS) Data Release 3 (DR3) catalogue was released in 2019, which contains the data from all BASS and Mosaic z-band Legacy (MzLS) observations during 2015 January 2019 March, about 200 million sources. We cross-match DR3 with spectral databases Sloan Digital (SDSS) Large Area Multi-object Fiber Spectroscopic Telescope (LAMOST) to obtain spectroscopic classes of known samples. Then, samples are cross-matched ALLWISE database. Based on optical infrared...
Correlating BASS DR3 catalogue with ALLWISE database, the data from optical and infrared information are obtained. The quasars SDSS taken as training test samples while those LAMOST considered external sample. We propose two schemes to construct redshift estimation models XGBoost, CatBoost Random forest. One scheme (namely one-step model) is predict photometric redshifts directly based on optimal created by these three algorithms; other two-step firstly classify into low- high- datasets,...
Abstract LAMOST Data Release 5, covering ∼17 000 deg 2 from –10° to 80° in declination, contains 9 million co-added low-resolution spectra of celestial objects, each spectrum combined repeat exposure two tens times during Oct 2011 Jun 2017. In this paper, we present the individual exposures for all objects 5. For spectrum, equivalent width 60 lines 11 different elements are calculated with a new method combining actual line core and fitted wings. stars earlier than F type, Balmer both...
The accurate estimation of photometric redshifts plays a crucial role in accomplishing science objectives the large survey projects. template-fitting and machine learning are two main types methods applied currently. Based on training set obtained by cross-correlating DESI Legacy Imaging Surveys DR9 galaxy catalogue SDSS DR16 catalogue, kinds used optimized, such as EAZY for approach CATBOOST learning. Then created models tested cross-matched samples SurveysDR9 with LAMOST DR7, GAMA DR3...
The Beijing-Arizona Sky Survey (BASS) is a new wide-field legacy imaging survey in the northern Galactic cap using 2.3m Bok telescope. will cover about 5400 deg$^2$ $g$ and $r$ bands, expected 5$\sigma$ depths (corrected for extinction) two bands are 24.0 23.4 mag, respectively. BASS started observations January 2015, has completed 41% of whole area as July 2016. first data release contains both calibrated images photometric catalogs obtained 2015 single-epoch 22.9 full three epochs 24.1 23.5
The South Galactic Cap u-band Sky Survey (SCUSS) is a deep imaging survey in the Southern Cap, using 90Prime wide-field imager on 2.3m Bok telescope at Kitt Peak. observations started 2010 and ended 2013. final area about 5000 deg2 with median 5-sigma point source limiting magnitude of 23.2. This paper describes data reduction process, which includes basic processing, astrometric photometric calibrations, image stacking, measurements. photometry performed objects detected both SCUSS images...
The three Antarctic Survey Telescopes (AST3) aim to carry out time domain imaging survey at Dome A, Antarctica. first of the telescopes (AST3-1) was successfully deployed on January 2012. AST3-1 is a 500\,mm aperture modified Schmidt telescope with 680\,mm diameter primary mirror. equipped SDSS $i$ filter and 10k $\times$ frame transfer CCD camera, reduced 5k by electronic shuttering, resulting in 4.3 deg$^2$ field-of-view. To verify capability for variety science goals, extensive...
We present seeing measurements of the Guoshoujing Telescope (formerly named Large Sky Area Multi-Object Fiber Spectroscopic Telescope- LAMOST) site at Xinglong station during period from 2007 March 12 to April 25. The were carried out with Differential Image Motion Monitor (DIMM), and a total 9259 data sets was obtained. median measured be 1.1'', 25% being better than 0.8''and 75% 1.5''. experiment shows that DIMM exposure time has significant effects on results measurements. An SBIG Polaris...
This paper describes the second data release (DR2) of Beijing–Arizona Sky Survey (BASS). BASS is an imaging survey covering a 5400 deg2 footprint in g and r bands using 2.3 m Bok telescope. DR2 includes observations through 2017 July obtained by Mayall z-band Legacy (MzLS), which used 4 telescope to observe same footprint. MzLS have completed 72% 76% their observations. The two surveys will be served for spectroscopic targeting upcoming Dark Energy Spectroscopic Instrument. Both are reduced...
ABSTRACT We study the integral Galactic extinction and reddening based on galaxy catalog of South Cap u -band Sky Survey (SCUSS), where number counts − r color distribution are used to derive respectively. compare these independent statistical measurements with map Schlegel et al. (SFD) find that both from in good agreement SFD results at low regions ( <?CDATA $E{(B-V)}^{\mathrm{SFD}}\lt 0.12$?> mag). However, for high $E{(B-V)}^{\mathrm{SFD}}\gt mag), overestimates systematically, which can...
The Large sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) is the largest optical telescope in China. In last four years, LAMOST has published editions data (pilot release, release 1, 2 and 3). To archive these (raw data, catalog, spectrum etc), we have set up a cycle management system, including transfer of archiving, backup. And through evolution software versions, mature established system.
Astronomy research has entered an increasingly data-intensive, or “big data” era. Exponential growth in the size of astronomical archives brings with it completely new requirements and challenges for data storage, computing power, networks, software, algorithms, even methods. Astronomers experts information computation technology (ICT) are working together to simplify knowledge discovery within these massive sets. Worldwide connected through virtual observatory (VO) framework, which provides...
Virtual Observatory (VO) is a data-intensively online astronomical research and education environment, which takes advantages of advanced information technologies to achieve seamless global access information.AstroCloud cyber-infrastructure for astronomy initiated by Chinese (China-VO) project, also kind physical distributed platform integrates lots tasks such as telescope proposal management, data archiving, quality control, release open access, cloud based processing analysis.It consists...
The search and follow-up observation of electromagnetic (EM) counterparts gravitational waves (GW) is a current hot topic GW cosmology. Due to the limitation accuracy facility at this stage, we can only get rough sky-localization region for event, typical area between 200 1500 square degrees. Since events occur in or near galaxies, limiting target galaxies significantly speedup searching EM counterparts. Therefore, how efficiently select host galaxy candidates such large localization region,...
AstroCloud is a cyber-Infrastructure for Astronomy Research initiated by Chinese Virtual Observatory (China-VO) under funding support from NDRC (National Development and Reform commission) CAS (Chinese Academy of Sciences){\url{http://astrocloud.china-vo.org}}\citep{O8-5_Cui_adassxxiv}. To archive the astronomical data in China, we present implementation archiving system (ADAS). Data quality control are infrastructure AstroCloud. Throughout entire life cycle, standardized data, transferring...