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CHANDRA ACIS SURVEY OF X-RAY POINT SOURCES: THE SOURCE CATALOG
Wang, Song; Liu, Jifeng; Qiu, Yanli; Bai, Yu; Yang, Huiqin; Guo, Jincheng; Zhang, Peng
2016
Source PublicationASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
Volume224Issue:2Pages:64
AbstractThe Chandra archival data is a valuable resource for various studies on different X-ray astronomy topics. In this paper, we utilize this wealth of information and present a uniformly processed data set, which can be used to address a wide range of scientific questions. The data analysis procedures are applied to 10,029 Advanced CCD Imaging Spectrometer observations, which produces 363,530 source detections belonging to 217,828 distinct X-ray sources. This number is twice the size of the Chandra Source Catalog (Version 1.1). The catalogs in this paper provide abundant estimates of the detected X-ray source properties, including source positions, counts, colors, fluxes, luminosities, variability statistics, etc. Cross-correlation of these objects with galaxies shows that 17,828 sources are located within the D-25 isophotes of 1110 galaxies, and 7504 sources are located between the D-25 and 2D(25) isophotes of 910 galaxies. Contamination analysis with the log N-log S relation indicates that 51.3% of objects within 2D(25) isophotes are truly relevant to galaxies, and the "net" source fraction increases to 58.9%, 67.3%, and 69.1% for sources with luminosities above 10(37), 10(38), and 10(39) erg s(-1), respectively. Among the possible scientific uses of this catalog, we discuss the possibility of studying intra-observation variability, inter-observation variability, and supersoft sources (SSSs). About 17,092 detected sources above 10 counts are classified as variable in individual observation with the Kolmogorov-Smirnov (K-S) criterion (PK-S < 0.01). There are 99,647 sources observed more than once and 11,843 sources observed 10 times or more, offering us a wealth of data with which to explore the long-term variability. There are 1638 individual objects (similar to 2350 detections) classified as SSSs. As a quite interesting subclass, detailed studies on X-ray spectra and optical spectroscopic follow-up are needed to categorize these SSSs and pinpoint their properties. In addition, this survey can enable a wide range of statistical studies, such as X-ray activity in different types of stars, X-ray luminosity functions in different types of galaxies, and multi-wavelength identification and classification of different X-ray populations.
DOI10.3847/0067-0049/224/2/40
Citation statistics
Cited Times:20[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/16813
Collection暗物质和空间天文实验室
Recommended Citation
GB/T 7714
Wang, Song,Liu, Jifeng,Qiu, Yanli,et al. CHANDRA ACIS SURVEY OF X-RAY POINT SOURCES: THE SOURCE CATALOG[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2016,224(2):64.
APA Wang, Song.,Liu, Jifeng.,Qiu, Yanli.,Bai, Yu.,Yang, Huiqin.,...&Zhang, Peng.(2016).CHANDRA ACIS SURVEY OF X-RAY POINT SOURCES: THE SOURCE CATALOG.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,224(2),64.
MLA Wang, Song,et al."CHANDRA ACIS SURVEY OF X-RAY POINT SOURCES: THE SOURCE CATALOG".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 224.2(2016):64.
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