Physics
Scientific paper
Feb 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ycat..74061583w&link_type=abstract
VizieR On-line Data Catalog: J/MNRAS/406/1583. Originally published in: 2010MNRAS.406.1583W
Physics
Surveys, Qsos, Redshifts, Photometry: Sdss, Photometry: Infrared
Scientific paper
We cross-identify all quasars in SDSS Data Release 7 (DR7) with the UKIDSS DR3, by finding the closest counterparts within 3-arcsec between the positions in two surveys and requesting all detections in both SDSS ugriz and UKIDSS YJHK bands for each quasar. To do the cross-identifications, we use the CrossID form available at the UKIDSS WFCAM Science Archive web site (http://surveys.roe.ac.uk:8080/wsa/crossID_form.jsp/) and use only the data in UKIDSS Large Area Survey (LAS) in order to avoid the misidentifications in the crowded fields with lower Galactic latitudes. This results in a sample of 8498 quasars with both SDSS and UKIDSS data.
(1 data file).
Jia Zhongxiao
Wu Xue-Bing
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