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DEEP CFHT Y-BAND IMAGING OF VVDS-F22 FIELD. I. DATA PRODUCTS AND PHOTOMETRIC REDSHIFTS
Liu, Dezi1; Yang, Jinyi1; Yuan, Shuo1; Wu, Xue-Bing1,2; Fan, Zuhui1; Shan, Huanyuan3; Yan, Haojing4; Zheng, Xianzhong5
2017-02-01
Source PublicationASTRONOMICAL JOURNAL
ISSN0004-6256
Volume153Issue:2Pages:14
Corresponding AuthorLiu, Dezi(adzliu@pku.edu.cn)
AbstractWe present our deep Y-band imaging data of a two square degree field within the F22 region of the VIMOS VLT Deep Survey. The observations were conducted using the WIRCam instrument mounted at the Canada-France-Hawaii Telescope (CFHT). The total on-sky time was 9 hours, distributed uniformly over 18 tiles. The scientific goals of the project are to select faint quasar candidates at redshift z > 2.2, and constrain the photometric redshifts for quasars and galaxies. In this paper, we present the observation and the image reduction, as well as the photometric redshifts that we derived by combining our Y-band data with the CFHTLenS u*g'r'i'z' optical data and UKIDSS DXS JHK near-infrared data. With J-band image as reference total similar to 80,000 galaxies are detected in the final mosaic down to Y-band 5 sigma point source limiting depth of 22.86 mag. Compared with the similar to 3500 spectroscopic redshifts, our photometric redshifts for galaxies with z < 1.5 and i'less than or similar to 24.0 mag have a small systematic offset of vertical bar Delta z vertical bar less than or similar to 0.2, 1 sigma scatter 0.03< (sigma)Delta(z) < 0.06, and less than 4.0% of catastrophic failures. We also compare to the CFHTLenS photometric redshifts, and find that ours are more reliable at z greater than or similar to 0.6 because of the inclusion of the near-infrared bands. In particular, including the Y-band data can improve the accuracy at z similar to 1.0-2.0 because the location of the 4000 angstrom-break is better constrained. The Y-band images, the multi-band photometry catalog and the photometric redshifts are released at http://astro.pku.edu.cn/astro/data/DYI.html.
Keywordcatalogs galaxies: distances and redshifts galaxies: photometry surveys
DOI10.3847/1538-3881/153/2/53
WOS KeywordDIGITAL SKY SURVEY ; YALE-CHILE MUSYC ; FRANCE-HAWAII TELESCOPE ; SPECTROSCOPIC TARGET SELECTION ; MULTIWAVELENGTH SURVEY ; DATA RELEASE ; LENSING SURVEY ; SDSS-III ; GALAXIES ; CATALOG
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000405781100003
PublisherIOP PUBLISHING LTD
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/22893
Collection中国科学院紫金山天文台
Corresponding AuthorLiu, Dezi
Affiliation1.Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China
2.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China
3.EPFL, Lab Astrophys LASTRO, Observ Sauverny, CH-1290 Versoix, Switzerland
4.Univ Missouri, Dept Phys & Astron, Columbia, MO 65211 USA
5.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Liu, Dezi,Yang, Jinyi,Yuan, Shuo,et al. DEEP CFHT Y-BAND IMAGING OF VVDS-F22 FIELD. I. DATA PRODUCTS AND PHOTOMETRIC REDSHIFTS[J]. ASTRONOMICAL JOURNAL,2017,153(2):14.
APA Liu, Dezi.,Yang, Jinyi.,Yuan, Shuo.,Wu, Xue-Bing.,Fan, Zuhui.,...&Zheng, Xianzhong.(2017).DEEP CFHT Y-BAND IMAGING OF VVDS-F22 FIELD. I. DATA PRODUCTS AND PHOTOMETRIC REDSHIFTS.ASTRONOMICAL JOURNAL,153(2),14.
MLA Liu, Dezi,et al."DEEP CFHT Y-BAND IMAGING OF VVDS-F22 FIELD. I. DATA PRODUCTS AND PHOTOMETRIC REDSHIFTS".ASTRONOMICAL JOURNAL 153.2(2017):14.
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