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We have developed the "S_IX" statistic to identify bright, highly-likelyActive Galactic Nucleus (AGN) candidates solely on the basis of WISE, 2MASS andRosat all-sky survey data. This statistic was optimized with data from thepreliminary WISE survey and the SDSS, and tested with Lick 3-m Kastspectroscopy. We find that sources with S_IX < 0 have a <~95% likelihood ofbeing an AGN (defined in this paper as a Seyfert 1, quasar or blazar). Thisstatistic was then applied to the full WISE/2MASS/RASS dataset, including thefinal WISE data release, to yield the "W2R" sample of 4,316 sources with S_IX <0. Only 2,209 of these sources are currently in the Veron-Cetty and Veron (VCV)catalog of spectroscopically confirmed AGN, indicating that the W2R samplecontains nearly 2,000 new, relatively bright (J <~ 16) AGN.  We utilize the W2R sample to quantify biases and incompleteness in the VCVcatalog. We find it is highly complete for bright (J < 14), northern AGN, butthe completeness drops below 50% for fainter, southern samples and for sourcesnear the Galactic plane. This approach also led to the spectroscopicidentification of 10 new AGN in the Kepler field, more than doubling the numberof AGN being monitored by Kepler. This has identified ~1 bright AGN every 10square degrees, permitting construction of AGN samples in any sufficientlylarge region of sky.

Reliable Identifications of AGN from the WISE, 2MASS and Rosat all-sky surveys