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We present a catalog of 99,203 wide binary systems, initially identified ascommon proper motion (CPM) pairs from a subset of ~5.2 million stars withproper motions $\mu > 40$ mas/year, selected from Gaia data release 2 (DR2) andthe SUPERBLINK high proper motion catalog. CPM pairs are found by searching forpairs of stars with angular separations $< 1$ degree and proper motiondifferences $\Delta\mu < 40$ mas/year. A Bayesian analysis is then applied intwo steps. In a first pass, we use proper motion differences and angularseparations to distinguish between binaries and chance alignments. In a secondpass, we use parallax data from Gaia DR2 to refine our Bayesian probabilityestimates. We present a table of 119,390 pairs which went through the fullanalysis, 99,203 of which have probabilities $>95\%$ of being real binaries. Ofthose 99,203 high probability pairs, we estimate that only about 364 pairs aremost likely to be false positives. In addition, we identify 57,506 pairs whichhave probabilities $>10\%$ from the first pass but have high parallax errorsand therefore were not vetted in the second pass. We examine the projectedphysical separation distribution of our highest probability pairs and note thatthe distribution is a simple exponential tail and shows no evidence of beingbi-modal. Among pairs with lower probability, wide binaries are detected atlarger separations ($>10^{4-5}$ AU) consistent with the very wide populationsuggested in previous studies, however our analysis suggests that these do notrepresent a distinct population. We examine the HR diagram of this set of highprobability wide binaries and find evidence for 980 over-luminous componentsamong 2,227 K+K wide binaries; assuming these represent unresolved sub-systems,we determine that the higher order multiplicity fraction for K+K wide systemsis at least 39.6\%.

The SUPERWIDE Catalog: A Catalog of 99,203 Wide Binaries Found in Gaia and Supplemented by the SUPERBLINK High Proper Motion Catalog