1998A&A...338L..59S

We report on the result of a BeppoSAX Target of Opportunity Observation of the hard pulsating X-ray source XTE J0055-724=1SAX J0054.9-7226, in the Small Magellanic Cloud (SMC). The source was detected by BeppoSAX at a flux level of ∼2x10^–11erg/cm²/s (2-10keV) and its position is consistent with that of the ROSAT PSPC source 1WGA J0054.9-7226 and the Einstein source 2E 0053.2-7242. Both these sources were known to possess a marked variability, on timescales ranging from months to years. The BeppoSAX energy spectrum of 1SAX J0054.0-7226 is hard and well modelled by an absorbed hard power-law model with a photon index ∼0.81. BeppoSAX detected up to 40keV the ∼59s pulsations originally discovered with by RXTE (Marshall & Lochner, 1998IAUC.6818Q...1M; Santangelo et al., 1998IAUC.6818R...1S).