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Sharp Chandra View of ROSAT All-Sky Survey Bright Sources I. Improvement of Positional Accuracy
Gao, Shuang1; Wang, Song2; Liu, Ji-Feng2,3
2016-12-01
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
Volume16Issue:12
AbstractThe ROSAT All-Sky Survey (RASS) represents one of the most complete and sensitive soft Xray all-sky surveys to date. However, the deficient positional accuracy of the RASS Bright Source Catalog (BSC) and subsequent lack of firm optical identifications affect multi-wavelength studies of X-ray sources. The widely used positional errors sigma(pos) based on the Tycho Reference Catalog (Tycho-1) have previously been applied for identifying objects in the optical band. The considerably sharper Chandra view covers a fraction of RASS sources, whose sigma(pos) could be improved by utilizing the sub-arcsec positional accuracy of Chandra observations. We cross-match X-ray objects between the BSC and Chandra sources extracted from the Advanced CCD Imaging Spectrometer (ACIS) archival observations. A combined list of counterparts (BSCxACIS) with Chandra spatial positions weighted by the X-ray flux of multiple counterparts is employed to evaluate and improve the former identifications of BSC when used with other surveys. Based on these identification evaluations, we suggest that the point-source likeness of BSC sources and INS (isolated neutron star) candidates should be carefully reconsidered.
SubtypeArticle
KeywordCatalogs Surveys X-rays: General X-rays: Stars
WOS HeadingsScience & Technology ; Physical Sciences
Funding OrganizationNational Natural Science Foundation of China (NSFC)(11503002 ; National Natural Science Foundation of China (NSFC)(11503002 ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; 11533002) ; 11533002) ; National Natural Science Foundation of China (NSFC)(11503002 ; National Natural Science Foundation of China (NSFC)(11503002 ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; 11533002) ; 11533002)
DOI10.1088/16711-1527/16/12/187
WOS KeywordISOLATED NEUTRON-STARS ; X-RAY ; SOURCE CATALOG ; XMM-NEWTON ; NUMBER
Indexed BySCI
Language英语
Funding OrganizationNational Natural Science Foundation of China (NSFC)(11503002 ; National Natural Science Foundation of China (NSFC)(11503002 ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; 11533002) ; 11533002) ; National Natural Science Foundation of China (NSFC)(11503002 ; National Natural Science Foundation of China (NSFC)(11503002 ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; 11533002) ; 11533002)
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000391647000009
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8288
Collection光学天文研究部
Affiliation1.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China
3.Univ Chinese Acad Sci, Coll Astron & Space Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Gao, Shuang,Wang, Song,Liu, Ji-Feng. Sharp Chandra View of ROSAT All-Sky Survey Bright Sources I. Improvement of Positional Accuracy[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2016,16(12).
APA Gao, Shuang,Wang, Song,&Liu, Ji-Feng.(2016).Sharp Chandra View of ROSAT All-Sky Survey Bright Sources I. Improvement of Positional Accuracy.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,16(12).
MLA Gao, Shuang,et al."Sharp Chandra View of ROSAT All-Sky Survey Bright Sources I. Improvement of Positional Accuracy".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 16.12(2016).
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