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Rossi X-ray Timing Explorer All Sky Monitor observations of SMC X-2 show thatthe source experienced an outburst in January to April 2000 reaching a peakluminosity of greater than ~10^38 ergs s^-1. RXTE Proportional Counter Arrayobservations during this outburst reveal the presence of pulsations with a2.37s period. However, optical photometry of the optical counterpart showed thesource to be still significantly fainter than it was more than half a yearafter the outburst in the 1970s when SMC X-2 was discovered.Comment: Accepted for publication in Astrophysical Journal Letter

The Discovery of an Outburst and Pulsed X-Ray Flux from SMC X-2 Using the [ITAL]Rossi X-Ray Timing Explorer[/ITAL]