SDSS quasars in the WISE preliminary data release and quasar candidate selection with optical/infrared colors

Xue-Bing Wu, Guoqiang Hao, Zhendong Jia +2

We present a catalog of 37,842 quasars in the SDSS Data Release 7, which have counterparts within 6" in the WISE Preliminary Data Release. The overall WISE detection rate of the SD…