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Black widows and redbacks are binary systems consisting of a millisecondpulsar in a close binary with a companion having matter driven off of itssurface by the pulsar wind. X-rays due to an intra-binary shock have beenobserved from many of these systems, as well as orbital variations in theoptical emission from the companion due to heating and tidal distortion. Wehave been systematically studying these systems in radio, optical and X-rays.Here we will present an overview of X-ray and optical studies of these systems,including new XMM-Newton and NuStar data obtained from several of them, alongwith new optical photometry.

X-Ray and Optical Properties of Black Widows and Redbacks