Discovery of 101-s Pulsations from AX J0057.4–7325 in the SMC with ASCA

The results from two ASCA observations of AX J0057.4 7325 = RX J0057.3 7325 are presented. Coherent pulsations with a barycentric period of 101.45±0.07 s were discovered in the second observation. The X-ray spectrum was found to be hard (photon index � 0.9) and unchanged through these observations, except for the flux. The ROSAT archival data show that AX J0057.4 7325 exhibits a flux variation with a factor > � 10. A discussion on a possible optical counterpart is given.